3 papers
physics.optics2026
Dispersion Control in Micromechanical Evanescent Optical Modulators
Karl Johnson, John Hong, Tallis Chang +8
Efficient, low-loss, and versatile optical modulators are a critical ingredient for practical integrated photonic systems. Modulators based on micro-electromechanical systems (MEMS…
physics.optics2025
Interferometric modal splitting enables a broadband, dual-polarization on-chip spectrometer
Karl Johnson, Vladimir Fedorov, Dmitrii Belogolovskii +3
The modal dispersion of waveguides often limits integrated photonic devices to operation with a single polarization state. This presents a challenge for sensing and spectroscopy ap…
physics.optics2025
Large Bidirectional Refractive Index Change in Silicon-rich Nitride via Visible Light Trimming
Dmitrii Belogolovskii, Md Masudur Rahman, Karl Johnson +6
Phase-sensitive integrated photonic devices are highly susceptible to minor manufacturing deviations, resulting in significant performance inconsistencies. This variability has lim…