conference paper published yes Sachin Vaidya author Seou Choi author Charles Roques-Carmes author e2e68fc9-6505-11ef-a541-eb4e72cc3e82 Marin Soljačić author OPTO We demonstrate that nanophotonic scintillators based on three-dimensional (3D) photonic crystals can overcome the longstanding tradeoff between spatial resolution and light yield in X-ray imaging. By engineering supercollimation, which is light propagation without angular spreading, within the emission spectrum, we strongly shape the angular emission profile of the scintillator, dramatically reducing blurring at large thicknesses. Our theoretical and numerical results, using realistic scintillator and photonic crystal parameters, show that this improves the Detector Quantum Efficiency (DQE) by up to several orders of magnitude at high spatial frequencies, enabling sharper images and reduced X-ray dosages. This approach offers a new path toward high-resolution, low-dose X-ray imaging systems. SPIE2026San Francisco, CA, United States eng 10.1117/12.3079431 PC13910 yes Vaidya, S., Choi, S., Roques-Carmes, C., &#38; Soljačić, M. (2026). Supercollimating photonic crystal scintillators. In <i>High Contrast Metastructures XV</i> (Vol. PC13910). San Francisco, CA, United States: SPIE. <a href="https://doi.org/10.1117/12.3079431">https://doi.org/10.1117/12.3079431</a> Vaidya S, Choi S, Roques-Carmes C, Soljačić M. Supercollimating photonic crystal scintillators. In: <i>High Contrast Metastructures XV</i>. Vol PC13910. SPIE; 2026. doi:<a href="https://doi.org/10.1117/12.3079431">10.1117/12.3079431</a> S. Vaidya, S. Choi, C. Roques-Carmes, M. Soljačić, in:, High Contrast Metastructures XV, SPIE, 2026. Vaidya, Sachin, et al. “Supercollimating Photonic Crystal Scintillators.” <i>High Contrast Metastructures XV</i>, vol. PC13910, PC1391008, SPIE, 2026, doi:<a href="https://doi.org/10.1117/12.3079431">10.1117/12.3079431</a>. Vaidya S, Choi S, Roques-Carmes C, Soljačić M. 2026. Supercollimating photonic crystal scintillators. High Contrast Metastructures XV. OPTO vol. PC13910, PC1391008. Vaidya, Sachin, Seou Choi, Charles Roques-Carmes, and Marin Soljačić. “Supercollimating Photonic Crystal Scintillators.” In <i>High Contrast Metastructures XV</i>, Vol. PC13910. SPIE, 2026. <a href="https://doi.org/10.1117/12.3079431">https://doi.org/10.1117/12.3079431</a>. S. Vaidya, S. Choi, C. Roques-Carmes, and M. Soljačić, “Supercollimating photonic crystal scintillators,” in <i>High Contrast Metastructures XV</i>, San Francisco, CA, United States, 2026, vol. PC13910. 215812026-03-30T12:22:48Z2026-05-05T10:53:00Z