All optical reconfiguration of optomechanical filters

Parag B. Deotare, Irfan Bulu, Ian W. Frank, Qimin Quan, Yinan Zhang, Rob Ilic and Marko Loncar ()
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Parag B. Deotare: School of Engineering and Applied Sciences, Harvard University
Irfan Bulu: School of Engineering and Applied Sciences, Harvard University
Ian W. Frank: School of Engineering and Applied Sciences, Harvard University
Qimin Quan: School of Engineering and Applied Sciences, Harvard University
Yinan Zhang: School of Engineering and Applied Sciences, Harvard University
Rob Ilic: Cornell University
Marko Loncar: School of Engineering and Applied Sciences, Harvard University

Nature Communications, 2012, vol. 3, issue 1, 1-8

Abstract: Abstract Reconfigurable optical filters are of great importance for applications in optical communication and information processing. Of particular interest are tuning techniques that take advantage of mechanical deformation of the devices, as they offer wider tuning range. Here we demonstrate reconfiguration of coupled photonic crystal nanobeam cavities by using optical gradient force induced mechanical actuation. Propagating waveguide modes that exist over a wide wavelength range are used to actuate the structures and control the resonance of localized cavity modes. Using this all-optical approach, more than 18 linewidths of tuning range is demonstrated. Using an on-chip temperature self-referencing method, we determine that 20% of the total tuning was due to optomechanical reconfiguration and the rest due to thermo-optic effects. By operating the device at frequencies higher than the thermal cutoff, we show high-speed operation dominated by just optomechanical effects. Independent control of mechanical and optical resonances of our structures is also demonstrated.

Date: 2012
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms1830

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DOI: 10.1038/ncomms1830

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