Micron-scale, efficient, and robust phase modulators at visible wavelengths

Nanfang Yu; Guozhen Liang; Heqing Huang; Aseema Mohanty; Xingchen Ji; Min Chul Shin; Michael Carter; Sajan Shrestha; Michal Lipson

doi:10.1117/12.2589481

8 March 2021 Micron-scale, efficient, and robust phase modulators at visible wavelengths

Nanfang Yu, Guozhen Liang, Heqing Huang, Aseema Mohanty, Xingchen Ji, Min Chul Shin, Michael Carter, Sajan Shrestha, Michal Lipson

Author Affiliations +

Proceedings Volume 11694, Photonic and Phononic Properties of Engineered Nanostructures XI; 1169407 (2021) https://doi.org/10.1117/12.2589481
Event: SPIE OPTO, 2021, Online Only

Abstract

Optical phase modulators are essential to large-scale integrated photonic systems at visible wavelengths, promising for many emerging applications. However, current technologies require large device footprints and either high power consumption or high drive voltage, limiting the number of active elements in a visible integrated photonic circuit. Here, we demonstrate visible silicon-nitride thermo-optical phase modulators based on adiabatic micro-ring resonators that offer at least a one-order-of-magnitude reduction in both device footprint and power consumption compared to waveguide phase modulators. Designed to operate in the strongly over-coupled regime, the micro-resonators provide 2 pi phase modulation with minimal amplitude variations, corresponding to less than 1 dB device insertion losses. By delocalizing the resonant mode, the adiabatic micro-rings also exhibit substantially improved robustness against fabrication variations.

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Nanfang Yu, Guozhen Liang, Heqing Huang, Aseema Mohanty, Xingchen Ji, Min Chul Shin, Michael Carter, Sajan Shrestha, and Michal Lipson "Micron-scale, efficient, and robust phase modulators at visible wavelengths", Proc. SPIE 11694, Photonic and Phononic Properties of Engineered Nanostructures XI, 1169407 (8 March 2021); https://doi.org/10.1117/12.2589481

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