2 papers
physics.optics2026
Piezoelectric MEMS Phase Modulator for Silicon Nitride Platform in the Visible Spectrum
Firehun T. Dullo, Paul C. Thrane, Nikhil Jayakumar +4
Active photonic integrated circuits (PICs) in the visible spectrum are essential for on-chip applications, requiring low-loss waveguides with broad transparency and efficient, low-…
physics.optics2024
Metasurface lens that is converging or diverging depending on transmission direction enables ultra-compact MEMS tunable reflective lens
Firehun Dullo, Jesil Jose, Gregory Bouquet +2
A conventional refractive lens surface can act as a positive (converging) or negative (diverging) lens, but the same surface cannot act as both. We show that a geometric phase meta…