材料科学
极化(电化学)
指向性
光电子学
时域有限差分法
量子
光学
电信
计算机科学
物理
化学
物理化学
天线(收音机)
量子力学
作者
Larry K. Heki,Yahya Mohtashami,Robin Chao,Jacob J. Ewing,Alejandro Quevedo,Shuji Nakamura,Steven P. DenBaars,Jon A. Schuller
标识
DOI:10.1002/adom.202303186
摘要
Abstract Metasurface‐based optical elements offer a wide design space for miniature and lightweight optical applications. Typically, metasurface optical elements transform an incident light beam into a desired output waveform. Recent demonstrations of light‐emitting metasurfaces highlight the potential for directly producing desired output waveforms via metasurface‐mediated spontaneous emission. In this work, reciprocal finite‐difference time‐domain (FDTD) simulations and machine learning are used to enable the inverse design of highly unidirectional photoluminescent III‐Nitride quantum well metasurfaces capable of directive p ‐, s ‐, or combined p ‐ and s ‐ polarized emission at arbitrary angles. In comparison with previous intuition‐guided designs using the same quantum well architectures, the inverse design approach enables new polarization capabilities and experimentally demonstrated improvements in directivity of 54%. An analysis of ways in which the inverse design both validates and contradicts previous intuition‐guided design heuristics is presented. Ultimately, the combination of reciprocal simulations and efficient global optimization (EGO) grants remarkable improvements in emission directivity and results in full control over the polarization and momentum of emitted light, including simultaneous directional emission of s ‐ and p ‐polarized light.
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