Ultrasensitive and compact tunable electro-optic filter in a 2D silicon photonic-crystal cavity

作者：Ebrahimy Mehdi N^*; Naziri Mohammad; Andalib Alireza; Kuzekanani Ziaddin Daie

来源：Laser Physics, 2016, 26(6): 066202.

DOI：10.1088/1054-660X/26/6/066202

• electro-optic filter
• modal volume
• silicon photonic

In this work, we designed and simulated a high Q-factor photonic crystal cavity with a PN junction to demonstrate a high-sensitivity and high tunable electro-optic filter (EOF). For this purpose, we used a cavity based on 2D photonic crystal structures and created a PN junction with 1 mu m width in the center of the cavity to change the refractive index of it. The electro-optic sensitivity of the cavity was improved by reducing modal volume and scattering power. Reverse bias in the range of (-3.88 V-0.288 V) is applied to the PN junction and the output spectrum is investigated for various bias voltages. The output wavelengths of designed EOF can be tuned by manipulating cavity cells. In final response of EOF the maximum transmission efficiency is more than 93%, the overall Q-factor is more than 14 500. The whole device fits in a compact 102.6 mu m(2) (17.4 mu m x 5.9 mu m) footprint.

• 出版日期2016-6