Department of Physics2024-11-0920080003-695110.1063/1.29273732-s2.0-44049103491https://hdl.handle.net/20.500.14288/2403Using electrowetting, we demonstrate reversible spectral tuning of the whispering gallery modes of glycerol/water microdroplets standing on a superhydrophobic surface by up to 4.7 nm at 400 V. Our results can inspire electrically tunable optical switches and filters based on microdroplets on a superhydrophobic surface. The sensitivity of the observed spectral drift to the contact angle can also be used to measure the contact angles of microdroplets on a superhydrophobic surface. (C) 2008 American Institute of Physics.pdfApplied physicsJournal Articlehttps://doi.org/10.1063/1.2927373256564200004Q2NOIR00471