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Title: A Brewster route to Cherenkov detectors
Authors: Lin, Xiao
Hu, Hao
Easo, Sajan
Yang, Yi
Shen, Yichen
Yin, Kezhen
Blago, Michele Piero
Kaminer, Ido
Zhang, Baile
Chen, Hongsheng
Joannopoulos, John
Soljačić, Marin
Luo, Yu
Keywords: Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
Issue Date: 2021
Source: Lin, X., Hu, H., Easo, S., Yang, Y., Shen, Y., Yin, K., Blago, M. P., Kaminer, I., Zhang, B., Chen, H., Joannopoulos, J., Soljačić, M. & Luo, Y. (2021). A Brewster route to Cherenkov detectors. Nature Communications, 12, 5554-.
Project: MOE2018- T2-2-189 (S)
MOE2018-T2-1-022 (S)
Journal: Nature Communications 
Abstract: Cherenkov detectors enable a valuable tool to identify high-energy particles. However, their sensitivity and momentum coverage are limited by the refractive index of host materials. Especially, identifying particles with energy above multiple gigaelectronvolts requires host materials with a near-unity refractive index, which are limited to bulky gas chambers. Overcoming this fundamental material limit is important for future particle detectors yet remains a long-standing challenge. Here, we propose a different paradigm for Cherenkov detectors that utilizes the broadband angular filter made from stacks of variable onedimensional photonic crystals. Owing to the Brewster effect, the angular filter is transparent only to Cherenkov photons from a precise incident angle. Particle identification is achieved by mapping each Cherenkov angle to the peak-intensity position of transmitted photons in the detection plane. Such angular filtering effect, although decreases the photon number collected in the detection plane, enables the realization of a non-dispersive pseudo refractive index over the entire visible spectrum. Moreover, the pseudo refractive index can be flexibly designed to different values close to unity. Our angular-selective Brewster paradigm offers a feasible solution to implement compact and highly sensitive Cherenkov detectors especially in beam lines with a small angular divergence using regular dielectrics.
ISSN: 2041-1723
DOI: 10.1038/s41467-021-25822-x
DOI (Related Dataset): 10.21979/N9/4WB7AF
Rights: © 2021 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit licenses/by/4.0/.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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