纳米光子学
材料科学
光电子学
六方氮化硼
可见光谱
紫外线
氮化硼
六方晶系
硼
纳米技术
结晶学
石墨烯
化学
有机化学
作者
Dmitriy V Grudinin,Georgy A. Ermolaev,Denis G. Baranov,Adilet N. Toksumakov,К. В. Воронин,Aleksandr S. Slavich,Andrey A. Vyshnevyy,Arslan Mazitov,Ivan A. Kruglov,Davit Ghazaryan,Aleksey V. Arsenin,Kostya S. Novoselov,Valentyn S. Volkov
出处
期刊:Materials horizons
[The Royal Society of Chemistry]
日期:2023-01-01
卷期号:10 (7): 2427-2435
被引量:9
摘要
A global trend towards miniaturization and multiwavelength performance of nanophotonic devices drives research on novel phenomena, such as bound states in the continuum and Mietronics, as well as surveys for high-refractive index and strongly anisotropic materials and metasurfaces. Hexagonal boron nitride (hBN) is one of the promising materials for future nanophotonics owing to its inherent anisotropy and prospects of high-quality monocrystal growth with an atomically flat surface. Here, we present highly accurate optical constants of hBN in the broad wavelength range of 250-1700 nm combining imaging ellipsometry measurements, scanning near-field optical microscopy and first-principles quantum mechanical computations. hBN's high refractive index, up to 2.75 in the ultraviolet (UV) and visible range, broadband birefringence of ∼0.7, and negligible optical losses make it an outstanding material for UV and visible range photonics. Based on our measurement results, we propose and design novel optical elements: handedness-preserving mirrors and subwavelength waveguides with dimensions of 40 nm operating in the visible and UV ranges, respectively. Remarkably, our results offer a unique opportunity to bridge the size gap between photonics and electronics.
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