3 papers
physics.optics2026
Many-mode grating couplers by avoiding undesired couplings
Nazar Pyvovar, Hao Li, Zhaowei Dai +1
To couple many independent modes from free space to on chip, the key challenge is not enhancing the many necessary coupling rates (scattering-matrix elements) between targeted mode…
physics.optics2026
Multimode grating couplers via foundry-compliant inverse design
Hao Li, Nazar Pyvovar, Zhaowei Dai +1
We apply a systematic inverse design approach to discover foundry-compliant, multilayer grating couplers that can efficiently couple a number of independent waves from free space t…
physics.optics2026
Dispersion Engineered Metastructures Enabling Broadband Angular Selectivity
Phillippe Pearson, Zhaowei Dai, Yiran Gu +2
Angle-selective optical devices are of importance to several applications such as photovoltaics, high-sensitivity photodetectors and displays. There are several approaches to reali…