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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 15 — Aug. 1, 2014
  • pp: 4431–4434

All-optical switching of silicon disk resonator based on photothermal effect in metal–insulator–metal absorber

Yuechun Shi, Xi Chen, Fei Lou, Yiting Chen, Min Yan, Lech Wosinski, and Min Qiu  »View Author Affiliations

Optics Letters, Vol. 39, Issue 15, pp. 4431-4434 (2014)

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Efficient narrowband light absorption by a metal–insulator–metal (MIM) structure can lead to high-speed light-to-heat conversion at a micro- or nanoscale. Such a MIM structure can serve as a heater for achieving all-optical light control based on the thermo-optical (TO) effect. Here we experimentally fabricated and characterized a novel all-optical switch based on a silicon microdisk integrated with a MIM light absorber. Direct integration of the absorber on top of the microdisk reduces the thermal capacity of the whole device, leading to high-speed TO switching of the microdisk resonance. The measurement result exhibits a rise time of 2.0 μs and a fall time of 2.6 μs with switching power as low as 0.5 mW; the product of switching power and response time is only about 1.3mW·μs. Since no auxiliary elements are required for the heater, the switch is structurally compact, and its fabrication is rather easy. The device potentially can be deployed for new kinds of all-optical applications.

© 2014 Optical Society of America

OCIS Codes
(130.3120) Integrated optics : Integrated optics devices
(190.4870) Nonlinear optics : Photothermal effects
(130.4815) Integrated optics : Optical switching devices
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Integrated Optics

Original Manuscript: May 6, 2014
Revised Manuscript: June 7, 2014
Manuscript Accepted: June 16, 2014
Published: July 23, 2014

Yuechun Shi, Xi Chen, Fei Lou, Yiting Chen, Min Yan, Lech Wosinski, and Min Qiu, "All-optical switching of silicon disk resonator based on photothermal effect in metal–insulator–metal absorber," Opt. Lett. 39, 4431-4434 (2014)

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