Details

Autor(en) / Beteiligte

• Briggs, Ryan M
• Pryce, Imogen M
• Atwater, Harry A

Titel

Compact silicon photonic waveguide modulator based on the vanadium dioxide metal-insulator phase transition

Ist Teil von

• Optics express, 2010-05, Vol.18 (11), p.11192-11201

Ort / Verlag

United States

Erscheinungsjahr

2010

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• We have integrated lithographically patterned VO2 thin films grown by pulsed laser deposition with silicon-on-insulator photonic waveguides to demonstrate a compact in-line absorption modulator for use in photonic circuits. Using single-mode waveguides at lambda=1550 nm, we show optical modulation of the guided transverse-electric mode of more than 6.5 dB with 2 dB insertion loss over a 2-microm active device length. Loss is determined for devices fabricated on waveguide ring resonators by measuring the resonator spectral response, and a sharp decrease in resonator quality factor is observed above 70 degrees C, consistent with switching of VO2 to its metallic phase. A computational study of device geometry is also presented, and we show that it is possible to more than double the modulation depth with modified device structures.