User login

Michelson Interferometer Thermo-optic Switch on SOI with a 50 Microwatt Power Consumption

Publication Type:

Journal Article


IEEE Photonics Technology Letters (2015)



We demonstrate photonic ultra-efficient thermooptic switches on a 220 nm silicon-on-insulator (SOI) platform. We used several approaches to increase the tuning efficiency of the switches. We used folded waveguides in a Michelson interferometer configuration to increase the optical interaction length of the light with the heated region, and used a suspended structure to improve thermal isolation. An ultra-low switching power of 50 uW is realized with an extinction ratio of over 26 dB for the transverse electric (TE) mode at 1550 nm. The 10%-90% response time of the switch is 1.28 ms, including a 780 us rise time and a 500 us fall time. As compared to the best thermooptic switch in the literature, our device shows approximately an order of magnitude reduction in power consumption.

Full Text:

Faculty Member(s): 
Research Area(s): 
Photonics and Optics