Robust and Flexible Free-Standing All-Dielectric Omnidirectional Reflectors


  • The authors thank Ying Tsui and Rik Tykwinski for assistance with fabrication processes. The work was supported by the Natural Sciences and Engineering Research Council of Canada. Devices were fabricated at the Nanofab of the University of Alberta.


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A chalcogenide glass and a polyamideimide polymer are used to fabricate freestanding membranes (see figure). The membranes are less than 3 μm thick but provide a near-unity omnidirectional reflection band in the near infrared. Optomechanical tuning of the filter response and manual construction of microcavities are demonstrated.