@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{13991,
  abstract     = {The prediction and realization of topological insulators have sparked great interest in experimental approaches to the classification of materials1,2,3. The phase transition between non-trivial and trivial topological states is important, not only for basic materials science but also for next-generation technology, such as dissipation-free electronics4. It is therefore crucial to develop advanced probes that are suitable for a wide range of samples and environments. Here we demonstrate that circularly polarized laser-field-driven high-harmonic generation is distinctly sensitive to the non-trivial and trivial topological phases in the prototypical three-dimensional topological insulator bismuth selenide5. The phase transition is chemically initiated by reducing the spin–orbit interaction strength through the substitution of bismuth with indium atoms6,7. We find strikingly different high-harmonic responses of trivial and non-trivial topological surface states that manifest themselves as a conversion efficiency and elliptical dichroism that depend both on the driving laser ellipticity and the crystal orientation. The origins of the anomalous high-harmonic response are corroborated by calculations using the semiconductor optical Bloch equations with pairs of surface and bulk bands. As a purely optical approach, this method offers sensitivity to the electronic structure of the material, including its nonlinear response, and is compatible with a wide range of samples and sample environments.},
  author       = {Heide, Christian and Kobayashi, Yuki and Baykusheva, Denitsa Rangelova and Jain, Deepti and Sobota, Jonathan A. and Hashimoto, Makoto and Kirchmann, Patrick S. and Oh, Seongshik and Heinz, Tony F. and Reis, David A. and Ghimire, Shambhu},
  issn         = {1749-4893},
  journal      = {Nature Photonics},
  keywords     = {Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials},
  number       = {9},
  pages        = {620--624},
  publisher    = {Springer Nature},
  title        = {{Probing topological phase transitions using high-harmonic generation}},
  doi          = {10.1038/s41566-022-01050-7},
  volume       = {16},
  year         = {2022},
}

@article{1057,
  abstract     = {Far-field super-resolution fluorescence microscopy discerns fluorophores residing closer than the diffraction barrier by briefly transferring them in different (typically ON and OFF) states before detection. In coordinate-targeted super-resolution variants, such as stimulated emission depletion (STED) microscopy, this state difference is created by the intensity minima and maxima of an optical pattern, causing all fluorophores to assume the off state, for instance, except at the minima. Although strong spatial confinement of the on state enables high resolution, it also subjects the fluorophores to excess intensities and state cycles at the maxima. Here, we address these issues by driving the fluorophores into a second off state that is inert to the excess light. By using reversibly switchable fluorescent proteins as labels, our approach reduces bleaching and enhances resolution and contrast in live-cell STED microscopy. Using two or more transitions to off states is a useful strategy for augmenting the power of coordinate-targeted super-resolution microscopy.},
  author       = {Danzl, Johann G and Sidenstein, Sven and Gregor, Carola and Urban, Nicolai and Ilgen, Peter and Jakobs, Stefan and Hell, Stefan},
  issn         = {1749-4893},
  journal      = {Nature Photonics},
  pages        = {122 -- 128},
  publisher    = {Springer Nature},
  title        = {{Coordinate-targeted fluorescence nanoscopy with multiple off states}},
  doi          = {10.1038/nphoton.2015.266},
  volume       = {10},
  year         = {2016},
}