@article{21641, abstract = {Spectral filters are widely used in sensing and communicating with light, such as for separating wavelength channels in communications or sensing the specific spectra of some object or material of interest. The filter function is, however, often fixed, and precise filtering can require precise manufacturing. We propose an approach to integrated optical spectral filtering that allows arbitrary programmability, can compensate automatically for imperfections in filter fabrication, allows multiple simultaneous and separately programmable filter functions on the same input, and can configure itself automatically to the problem of interest, for example, to filter or reject multiple arbitrarily chosen frequencies. The approach exploits splitting the input light into an array of multiple waveguides of different lengths that then feed a programmable interferometer array that can also self-configure. It can give a spectral response similar to arrayed waveguide gratings but offers many other filtering functions, as well as supporting other structures based on non-redundant arrays for precise spectral filtering. Simultaneous filtering also allows an automatic measurement of the temporal coherency matrix and physical separation into the Karhunen–Loève expansion of temporally partially coherent light fields. With this approach, a wide range of spectral operations can be controllably, automatically, and precisely performed by an integrated photonic device with simple programmability.}, author = {Miller, David A. B. and Roques-Carmes, Charles and Valdez, Carson G. and Kroo, Anne R. and Vlk, Marek and Fan, Shanhui and Solgaard, Olav}, issn = {2334-2536}, journal = {Optica}, number = {9}, pages = {1417--1426}, publisher = {Optica Publishing Group}, title = {{Universal programmable and self-configuring optical filter}}, doi = {10.1364/optica.557630}, volume = {12}, year = {2025}, } @article{21541, abstract = {Scintillators convert X-ray energy into visible light and are critical for imaging technologies. Their widespread use relies on scalable, high-quality manufacturing methods. Nanophotonic scintillators, featuring wavelength-scale nanostructures, can offer improved emission properties such as higher light yield, shorter decay times, and enhanced directionality. However, achieving scalable fabrication of these structures remains challenging. Here, we present a scalable fabrication method for large-area nanophotonic scintillators based on the self-assembly of chalcogenide glass photonic crystals. This technique enables the production of nanophotonic scintillators over wafer-scale areas, achieving a six-fold enhancement in light yield compared to unpatterned scintillators. By studying surface nanofabrication disorder, we show its impact on imaging performance and provide a route towards scintillation enhancements without compromising resolution. We demonstrate the practical applicability of our nanophotonic scintillators through X-ray imaging of biological and inorganic specimens. Our results could enable the industrial implementation of a new generation of nanophotonic-enhanced scintillators.}, author = {Martin-Monier, Louis and Pajovic, Simo and Abebe, Muluneh G. and Chen, Joshua and Vaidya, Sachin and Min, Seokhwan and Choi, Seou and Kooi, Steven E. and Maes, Bjorn and Hu, Juejun and Soljačić, Marin and Roques-Carmes, Charles}, issn = {2041-1723}, journal = {Nature Communications}, publisher = {Springer Nature}, title = {{Large-scale self-assembled nanophotonic scintillators for X-ray imaging}}, doi = {10.1038/s41467-025-60953-5}, volume = {16}, year = {2025}, } @article{21530, abstract = {Metasurfaces, ultrathin structures composed of subwavelength optical elements, have revolutionized light manipulation by enabling precise control over electromagnetic waves’ amplitude, phase, polarization, and spectral properties. Concurrently, computational imaging leverages algorithms to reconstruct images from optically processed signals, overcoming the limitations of traditional imaging systems. This Perspective explores the synergistic integration of metaoptics and computational imaging, “metaoptic computational imaging”, which combines the physical wavefront shaping ability of metasurfaces with advanced computational algorithms to enhance imaging performance beyond conventional limits. We discuss how metaoptic computational imaging addresses the inherent limitations of single-layer metasurfaces in achieving multifunctionality without compromising efficiency. By treating metasurfaces as physical preconditioners and codesigning them with reconstruction algorithms through end-to-end (inverse) design, it is possible to jointly optimize the optical hardware and computational software. Advanced applications and new frontiers in the field enabled by metaoptic computational imaging are highlighted, including phase imaging and quantum state measurement.}, author = {Roques-Carmes, Charles and Wang, Kai and Yang, Yuanmu and Majumdar, Arka and Lin, Zin}, issn = {2330-4022}, journal = {ACS Photonics}, keywords = {nanophotonics, metasurfaces, computational imaging, inverse design}, number = {4}, pages = {1722--1733}, publisher = {American Chemical Society}, title = {{Metaoptic computational imaging}}, doi = {10.1021/acsphotonics.4c02266}, volume = {12}, year = {2025}, } @article{21549, abstract = {Integrated photonics, particularly silicon photonics, have emerged as cutting-edge technology driven by promising applications such as short-reach communications, autonomous driving, biosensing and photonic computing1,2,3,4. As advances in AI lead to growing computing demands, photonic computing has gained considerable attention as an appealing candidate. Nonetheless, there are substantial technical challenges in the scaling up of integrated photonics systems to realize these advantages, such as ensuring consistent performance gains in upscaled integrated device clusters, establishing standard designs and verification processes for complex circuits, as well as packaging large-scale systems. These obstacles arise primarily because of the relative immaturity of integrated photonics manufacturing and the scarcity of advanced packaging solutions involving photonics. Here we report a large-scale integrated photonic accelerator comprising more than 16,000 photonic components. The accelerator is designed to deliver standard linear matrix multiply–accumulate (MAC) functions, enabling computing with high speed up to 1 GHz frequency and low latency as small as 3 ns per cycle. Logic, memory and control functions that support photonic matrix MAC operations were designed into a cointegrated electronics chip. To seamlessly integrate the electronics and photonics chips at the commercial scale, we have made use of an innovative 2.5D hybrid advanced packaging approach. Through the development of this accelerator system, we demonstrate an ultralow computation latency for heuristic solvers of computationally hard Ising problems whose performance greatly relies on the computing latency.}, author = {Hua, Shiyue and Divita, Erwan and Yu, Shanshan and Peng, Bo and Roques-Carmes, Charles and Su, Zhan and Chen, Zhang and Bai, Yanfei and Zou, Jinghui and Zhu, Yunpeng and Xu, Yelong and Lu, Cheng-kuan and Di, Yuemiao and Chen, Hui and Jiang, Lushan and Wang, Lijie and Ou, Longwu and Zhang, Chaohong and Chen, Junjie and Zhang, Wen and Zhu, Hongyan and Kuang, Weijun and Wang, Long and Meng, Huaiyu and Steinman, Maurice and Shen, Yichen}, issn = {1476-4687}, journal = {Nature}, pages = {361--367}, publisher = {Springer Nature}, title = {{An integrated large-scale photonic accelerator with ultralow latency}}, doi = {10.1038/s41586-025-08786-6}, volume = {640}, year = {2025}, } @article{21543, abstract = {Observing non-classical properties of light is a long-standing interest to advance a wide range of quantum applications. Optical cavities are essential to generate and manipulate non-classical light. However, detecting changes in cavity properties induced by the quantum state remains a critical challenge in the optical domain due to the weak material nonlinearity. Here, we propose a framework for observing the dynamics of quantum states generated inside nonlinear optical cavities. We leverage the symmetry-breaking process of a bistable system, which is highly sensitive to the initial state, enabling detection of quantum state displacement through an asymmetric equilibrium of a macroscopic observable. With a nonlinear response at the single photon level, our approach directly imprints the cavity field distribution onto the statistics of bistable cavity steady-states. We experimentally demonstrate our approach in a degenerate optical parametric oscillator, generating and reconstructing different quantum states. As a validation, we reconstruct the Husimi Q function of the cavity squeezed vacuum state. In addition, we observe the evolution of the quantum vacuum state inside the cavity as it undergoes phase-sensitive amplification. By enabling generation and measurement of quantum states in a single nonlinear optical cavity, our method paves a way for studying exotic dynamics of quantum optical states in nonlinear driven-dissipative systems.}, author = {Choi, Seou and Salamin, Yannick and Roques-Carmes, Charles and Sloan, Jamison and Horodynski, Michael and Soljačić, Marin}, issn = {2041-1723}, journal = {Nature Communications}, publisher = {Springer Nature}, title = {{Observing the dynamics of quantum states generated inside nonlinear optical cavities}}, doi = {10.1038/s41467-025-63035-8}, volume = {16}, year = {2025}, } @article{21531, abstract = {Entanglement is a unique feature of quantum mechanics. In coupled systems of light and matter, entanglement manifests itself in the linear superposition of multipartite quantum states (e.g., parametrized by the multiple spatial, spectral, or temporal degrees of freedom of a light field). In bipartite systems, the Schmidt decomposition provides a modal decomposition of the entanglement structure over independent, separable states. Although ubiquitous as a mathematical tool to describe and measure entanglement, there exists no general efficient experimental method to decompose a bipartite quantum state onto its Schmidt modes. Here, we propose a method that relies on bipartite self-configuring optics that automatically ``learns'' the Schmidt decomposition of an arbitrary pure quantum state. Our method is agnostic to the degrees of freedom over which quantum entanglement is distributed and can reconstruct the Schmidt modes and values by variational optimization of the network's output powers or coincidences. We illustrate our method with numerical examples of spectral entanglement analysis for biphotons generated via spontaneous parametric down conversion and provide experimental guidelines for its realization, including the influence of losses and impurities. Our method provides a versatile and scalable way of analyzing entanglement in bipartite integrated quantum photonic systems. }, author = {Roques-Carmes, Charles and Karnieli, Aviv and Miller, David A. B. and Fan, Shanhui}, issn = {2330-4022}, journal = {ACS Photonics}, keywords = {integrated photonics, spontaneous parametric down conversion, entanglement, quantum teleportation, reconfigurable optics}, number = {6}, pages = {3285--3294}, publisher = {American Chemical Society}, title = {{Automated modal analysis of entanglement with bipartite self-configuring optics}}, doi = {10.1021/acsphotonics.5c00813}, volume = {12}, year = {2025}, } @article{21536, abstract = {Scintillators have been widely used in X-ray imaging due to their ability to convert high-energy radiation into visible light, making them essential for applications such as medical imaging and high-energy physics. Recent advances in the artificial structuring of scintillators offer new opportunities for improving the energy resolution of scintillator-based X-ray detectors. Here, we present a three-bin energy-resolved X-ray imaging framework based on a three-layer multicolor scintillator used in conjunction with a physics-aware image postprocessing algorithm. The multicolor scintillator is able to preserve X-ray energy information through the combination of emission wavelength multiplexing and energy-dependent isolation of X-ray absorption in specific layers. The dominant emission color and the radius of the spot measured by the detector are used to infer the incident X-ray energy based on prior knowledge of the energy-dependent absorption profiles of the scintillator stack. Through ab initio Monte Carlo simulations, we show that our approach can achieve an energy reconstruction accuracy of 49.7%, which is only 2% below the maximum accuracy achievable with realistic scintillators. We apply our framework to medical phantom imaging simulations where we demonstrate that it can effectively differentiate iodine and gadolinium-based contrast agents from bone, muscle, and soft tissue.}, author = {Min, Seokhwan and Choi, Seou and Pajovic, Simo and Vaidya, Sachin and Rivera, Nicholas and Fan, Shanhui and Soljačić, Marin and Roques-Carmes, Charles}, issn = {2047-7538}, journal = {Light: Science & Applications}, publisher = {Springer Nature}, title = {{End-to-end design of multicolor scintillators for enhanced energy resolution in X-ray imaging}}, doi = {10.1038/s41377-025-01836-8}, volume = {14}, year = {2025}, } @article{21524, abstract = {In X-ray tubes, more than 99% of the kilowatts of power supplied to generate X-rays via bremsstrahlung is lost as heat in the anode. Therefore, thermal management is a critical barrier to the development of more powerful X-ray tubes with higher brightness and spatial coherence, which are needed to translate imaging modalities such as phase-contrast imaging to the clinic. In rotating anode X-ray tubes, the most common design, thermal radiation is a bottleneck that prevents efficient cooling of the anode─the hottest part of the device by far. We predict that nanophotonic patterning of the anode of an X-ray tube enhances heat dissipation via thermal radiation, enabling it to operate at higher powers without an increase in temperature. The focal spot size, which is related to the spatial coherence of generated X-rays, can also be reduced at a constant temperature. A major advantage of our “nanophotonic thermal management” approach is that in principle, it allows complete control over the spectrum and direction of thermal radiation, which can lead to optimal thermal routing and improved performance.}, author = {Pajovic, Simo and Roques-Carmes, Charles and Choi, Seou and Kooi, Steven E. and Gupta, Rajiv and Zalis, Michael E. and Čelanović, Ivan and Soljačić, Marin}, issn = {1936-086X}, journal = {ACS Nano}, keywords = {X-ray tubes, thermal management, nanophotonics, thermal radiation, X-ray imaging, high-temperature}, number = {35}, pages = {31363--31370}, publisher = {American Chemical Society}, title = {{Nanophotonic thermal management in X-ray tubes}}, doi = {10.1021/acsnano.5c05186}, volume = {19}, year = {2025}, } @article{21550, abstract = {Optical computing often employs tailor-made hardware to implement specific algorithms, trading generality for improved performance in key aspects like speed and power efficiency. An important computing approach that is still missing its corresponding optical hardware is probabilistic computing, used e.g. for solving difficult combinatorial optimization problems. In this study, we propose an experimentally viable photonic approach to solve arbitrary probabilistic computing problems. Our method relies on the insight that coherent Ising machines composed of coupled and biased optical parametric oscillators can emulate stochastic logic. We demonstrate the feasibility of our approach by using numerical simulations equivalent to the full density matrix formulation of coupled optical parametric oscillators.}, author = {Horodynski, Michael and Roques-Carmes, Charles and Salamin, Yannick and Choi, Seou and Sloan, Jamison and Luo, Di and Soljačić, Marin}, issn = {2399-3650}, journal = {Communications Physics}, publisher = {Springer Nature}, title = {{Stochastic logic in biased coupled photonic probabilistic bits}}, doi = {10.1038/s42005-025-01953-1}, volume = {8}, year = {2025}, } @article{21515, abstract = {The property of a physical system is highly dependent on its dimensionality. Topological physics in three or more dimensions exhibits rich phenomena without lower-dimensional counterparts. In this paper, the authors propose a scheme to implement such high-dimensional topological physics in a single photonic ring resonator, where the model of interest can be arbitrarily high dimensional and arbitrarily multi-band. The frequency modes in the resonator, coupled via electro-optic modulation, are used to create a high-dimensional lattice, and the spatial modes are used as the pseudo-spin degree of freedom within each lattice site. The band structure of the model can be measured from the transmission spectrum of the ring resonator. The authors numerically demonstrate as examples a three-dimensional, two-band model and a five-dimensional, four-band model. This paper establishes a versatile and programmable platform for high-dimensional topological physics, paving the way for its experimental studies and future applications.}, author = {Cheng, Dali and Wang, Heming and Roques-Carmes, Charles and Zhong, Janet and Fan, Shanhui}, issn = {2950-6360}, journal = {Newton}, number = {7}, publisher = {Elsevier}, title = {{Creating high-dimensional topological physics using a single ring resonator}}, doi = {10.1016/j.newton.2025.100163}, volume = {1}, year = {2025}, } @article{21544, abstract = {Lasers with high intensity generally exhibit strong intensity fluctuations far above the shot-noise level. Taming this noise is pivotal to a wide range of applications, both classical and quantum. Here we demonstrate the creation of intense light with quantum levels of noise even when starting from inputs with large amounts of excess noise. In particular, we demonstrate how intense squeezed light with intensities approaching 0.1 TW cm−2, but noise at or below the shot-noise level, can be produced from noisy inputs associated with high-power amplified laser sources (an overall noise reduction of 30-fold). On the basis of a new theory of quantum noise in multimode systems, we show that the ability to generate quantum light from noisy inputs results from multimode quantum correlations, which maximally decouple the output light from the dominant noise channels in the input light. As an example, we demonstrate this effect for femtosecond pulses in nonlinear fibres, but the noise-immune correlations that enable our results are generic to many other nonlinear systems in optics and beyond.}, author = {Zia Uddin, Shiekh and Rivera, Nicholas and Seyler, Devin and Sloan, Jamison and Salamin, Yannick and Roques-Carmes, Charles and Xu, Shutao and Sander, Michelle Y. and Kaminer, Ido and Soljačić, Marin}, issn = {1749-4893}, journal = {Nature Photonics}, pages = {751--757}, publisher = {Springer Nature}, title = {{Noise-immune quantum correlations of intense light}}, doi = {10.1038/s41566-025-01677-2}, volume = {19}, year = {2025}, } @article{21521, abstract = {Fast-emitting scintillators are essential for advanced diagnostic techniques, yet many suffer from low radiation attenuation. This trade-off is particularly pronounced in polymer scintillators, which, despite their fast emission, exhibit low density and low atomic numbers, limiting the radiation attenuation factor, resulting in low detection efficiency. Here, we overcome this limitation by creating a heterostructure scintillator of alternating nanometric layers, combining fast light-emitting polymer scintillator layers and transparent stopping layers with a high radiation attenuation factor. The nanolayer thicknesses are tuned to optimize the penetration depth of recoil electrons in active emissive layers, maximizing the conversion of X-rays to visible light. This design increases light output by up to 1.5 times and enhances imaging resolution by a factor of 2 compared to homogeneous polymer scintillators due to the ability to use thinner samples. These results demonstrate the potential of heterostructure scintillators as next-generation detector materials, overcoming the limitations of homogeneous scintillators.}, author = {Be’er, Orr and Shultzman, Avner and Strassberg, Rotem and Dosovitskiy, Georgy and Veber, Noam and Schuetz, Roman and Roques-Carmes, Charles and Kaminer, Ido and Bekenstein, Yehonadav}, issn = {1530-6992}, journal = {Nano Letters}, keywords = {Scintillator, Heterostructure, Thin film, X-ray imaging, X-ray detector}, number = {9}, pages = {3422--3429}, publisher = {American Chemical Society}, title = {{Heterostructure nanoscintillator for matching radiation absorbing layers with fast light-emitting layers}}, doi = {10.1021/acs.nanolett.4c05353}, volume = {25}, year = {2025}, } @article{21561, abstract = {Enhancing interactions in many-body quantum systems, while protecting them from environmental decoherence, is at the heart of many quantum technologies. Waveguide quantum electrodynamics is a promising platform for achieving this, as it hosts infinite-range interactions and decoherence-free subspaces of quantum emitters. However, as coherent interactions between emitters are typically washed out in the wavelength-spacing regime hosting decoherence-free states, coherent control over the latter becomes limited, and many-body Hamiltonians in this important regime remain out of reach. Here we show that by incorporating emitter arrays with nonlinear waveguides hosting parametric gain, we obtain a unique class of many-body interaction Hamiltonians with coupling strengths that increase with emitter spacing, and persist even for wavelength-spaced arrays. We then propose to use these Hamiltonians to coherently generate decoherence-free states directly from the ground state, using only global squeezing drives, without the need for local addressing of individual emitters. Interestingly, we find that the dynamics approaches a unitary evolution in the limit of weak intrawaveguide squeezing, and we discuss potential experimental realizations of this effect. Our results pave the way towards coherent control protocols in waveguide quantum electrodynamics, with applications including quantum computing, simulation, memory, and nonclassical light generation.}, author = {Karnieli, Aviv and Tziperman, Offek and Roques-Carmes, Charles and Fan, Shanhui}, issn = {2643-1564}, journal = {Physical Review Research}, number = {1}, publisher = {American Physical Society }, title = {{Decoherence-free many-body Hamiltonians in nonlinear waveguide quantum electrodynamics}}, doi = {10.1103/physrevresearch.7.l012014}, volume = {7}, year = {2025}, } @article{21542, abstract = {Nonlinear optics has become the workhorse for countless applications in classical and quantum optics, from optical bistability to single photon pair generation. However, the intrinsic weakness of optical nonlinearity and reciprocity of nonlinear interactions generally places stringent limits on the efficiency of nonlinear optical processes and their ability to be tailored for advanced applications in multimode systems. Here, motivated by recent advances in using non-Hermitian photonics and gain/loss engineering to enable non-reciprocal light transport, we explore how the interplay between non-Hermiticity and optical nonlinearity leads to a fundamentally new regime of nonlinear frequency conversion. We show how non-Hermitian coupling between discrete frequency modes can result in non-reciprocal flow of energy in a frequency dimension, closely resembling the non-Hermitian skin effect (NHSE). Applying our theory to a multimode nonlinear cavity supporting cascaded nonlinear processes, we demonstrate chiral energy flow in a frequency dimension, leading to long-range frequency shifts of quasi-continuous wave sources, shaped frequency combs robust to defects and disorder, terahertz (THz) generation far exceeding the Manley-Rowe limit, and nonlinear multimodal limit cycles for multi-frequency pump-probe spectroscopy.}, author = {Pontula, Sahil and Vaidya, Sachin and Roques-Carmes, Charles and Uddin, Shiekh Zia and Soljačić, Marin and Salamin, Yannick}, issn = {2041-1723}, journal = {Nature Communications}, publisher = {Springer Nature}, title = {{Non-reciprocal frequency conversion in a non-Hermitian multimode nonlinear system}}, doi = {10.1038/s41467-025-62853-0}, volume = {16}, year = {2025}, } @article{21556, abstract = {Light-matter interaction with a squeezed vacuum has received much interest for the ability to increase the native interaction strength between an atom and a photon with a reservoir assumed to have an infinite bandwidth. Here we study a model of parametrically driven cavity quantum electrodynamics (QED) for enhancing light-matter interaction while subjected to a finite-bandwidth squeezed vacuum drive. Our method is capable of unveiling the effect of relative bandwidth as well as squeezing required to observe the anticipated anticrossing spectrum and enhanced cooperativity without the ideal squeezed bath assumption. Furthermore, we analyze the practicality of said models when including intrinsic photon loss due to resonator imperfection. With these results, we outline the requirements for experimentally implementing an effectively squeezed bath in solid-state platforms such as In⁢As quantum dot cavity QED such that in situ control and enhancement of light-matter interaction could be realized.}, author = {Lê, Trung Kiên and Lukin, Daniil M. and Roques-Carmes, Charles and Karnieli, Aviv and Lustig, Eran and Guidry, Melissa A. and Fan, Shanhui and Vučković, Jelena}, issn = {2331-7019}, journal = {Physical Review Applied}, number = {3}, publisher = {American Physical Society}, title = {{Cavity quantum electrodynamics in a finite-bandwidth squeezed reservoir}}, doi = {10.1103/8qtt-symt}, volume = {24}, year = {2025}, } @article{21562, abstract = {Many quantum systems exhibit high sensitivity to their initial conditions, where microscopic quantum fluctuations can significantly influence macroscopic observables. Understanding how quantum states may influence the behavior of nonlinear dynamic systems may open new avenues in controlling light-matter interactions. To explore this issue, we analyze the sensitivity of a fundamental quantum optical process – parametric oscillation – to quantum initializations. Focusing on optical parametric oscillators (OPOs), we demonstrate that the quantum statistics of arbitrary initial states are imprinted in the early-stage dynamics and can persist in the steady-state probabilities. We derive the “quantum sensitivity” of parametric oscillators, linking the initial quantum state to the system's steady-state outcomes, highlighting how losses and parametric gain govern the system's quantum sensitivity. Moreover, we show that these findings extend beyond OPOs to a broader class of nonlinear systems, including Josephson junction based superconducting circuits. Our work opens the way to a new class of experiments that can test the sensitivity of macroscopic systems to quantum initial conditions and offers a pathway for controlling systems with quantum degrees of freedom.}, author = {Gu, Alex and Sloan, Jamison and Roques-Carmes, Charles and Choi, Seou and Rosenthal, Eric I. and Horodynski, Michael and Salamin, Yannick and Vučković, Jelena and Soljačić, Marin}, issn = {2643-1564}, journal = {Physical Review Research}, number = {2}, publisher = {American Physical Society}, title = {{Quantum sensitivity of parametric oscillators}}, doi = {10.1103/physrevresearch.7.l022056}, volume = {7}, year = {2025}, } @article{21572, abstract = {This study focuses on advancing metascintillators to break the 100 ps barrier and approach the 10 ps target. We exploitnanophotonic features, specifically the Purcell effect, to shape and enhance the scintillation properties of the first-generation metascintillator. We demonstrate that a faster emission is achievable along with a more efficient conversionefficiency. This results in a coincidence time resolution improved by a factor of 1.3, crucial for TOF-PET applications.}, author = {Shultzman, A. and Schütz, R. and Kurman, Y. and Lahav, N. and Dosovitskiy, G. and Roques-Carmes, Charles and Bekenstein, Y. and Konstantinou, G. and Latella, R. and Zhang, L. and Loignon-Houle, F. and Gonzalez, A. J. and Benlloch, J. M. and Kaminer, I. and Lecoq, P.}, issn = {2469-7303}, journal = {IEEE Transactions on Radiation and Plasma Medical Sciences}, keywords = {Nanophotonics, Positron emission tomography, scintillators}, number = {2}, pages = {141--147}, publisher = {Institute of Electrical and Electronics Engineers}, title = {{Toward a second generation of metascintillators using the Purcell effect}}, doi = {10.1109/trpms.2024.3471251}, volume = {9}, year = {2025}, } @inproceedings{21570, abstract = {Nanophotonic scintillators, which feature nanostructures at the scale of their emission wavelength, provide a promising approach to enhancing light yield with a substantially reduced thickness. Here, we demonstrate a six-fold emission enhancement over a wafer scale area of 4 cm x 4 cm and 0.5 mm thickness. This facilitates the development of brighter and thinner X-ray scintillators, which could lead to low-dose and high-resolution X-ray imaging with promising applications in medical imaging and nondestructive inspection.}, author = {Martin-Monier, Louis and Pajovic, Simo and Abebe, Muluneh G. and Chen, Joshua and Vaidya, Sachin and Min, Seokhwan and Choi, Seou and Kooi, Steven E. and Maes, Bjorn and Hu, Juejun and Soljačić, Marin and Roques-Carmes, Charles}, booktitle = {19th International Congress on Artificial Materials for Novel Wave Phenomena}, issn = {2573-2706 }, location = {Amsterdam, Netherlands }, publisher = {IEEE}, title = {{Large-area nanophotonic scintillators for X-ray imaging}}, doi = {10.1109/metamaterials65622.2025.11174194}, year = {2025}, } @article{21768, abstract = {Let F∈Z[x1,…,xn] be a homogeneous form of degree d≥2, and V∗F the singular locus of the hypersurface {x∈AnC:F(x)=0}. A longstanding result of Birch states that there is a non-trivial integral solution to the equation F(x1,…,xn)=0 provided n>dimV∗F+(d−1)2d, and there is a non-singular solution in R and Qp for all primes p. We give a different formulation of this result. More precisely, we replace dimV∗F with a quantity HF defined in terms of the Hessian matrix of F. This quantity satisfies 0≤HF≤dimV∗F; therefore, we improve on the aforementioned result of Birch if HF