Terahertz tuning of whispering gallery modes in a PDMS stand-alone, stretchable microsphere

Year: 2012

Authors: Madugani R., Yang Y., Ward JM., Riordan JD., Coppola S., Vespini V., Grilli S., Finizio A., Ferraro P., Chormaic SN.

Autors Affiliation: Univ Coll Cork, Dept Phys, Cork, Ireland; Tyndall Natl Inst, Photon Ctr, Cork, Ireland; CNR, Ist Nazl Ott Sez Napoli, I-80078 Pozzuoli, Napoli, Italy; OIST Grad Univ, Light Matter Interact Unit, Okinawa 9040495, Japan

Abstract: We report on tuning the optical whispering gallery modes (WGMs) in a poly dimethyl siloxane-based (PDMS) microsphere resonator by more than 1 THz. The PDMS microsphere system consists of a solid spherical resonator directly formed with double stems on either side. The stems act like tie-rods for simple mechanical stretching of the micro-resonator, resulting in tuning of the WGMs by one free spectral range. Further investigations demonstrate that the WGM shift has a higher sensitivity (0.13 nm/mu N) to an applied force when the resonator is in its maximally stretched state compared to its relaxed state. (C) 2012 Optical Society of America

Journal/Review: OPTICS LETTERS

Volume: 37 (22)      Pages from: 4762  to: 4764

More Information: Jonathan Ward acknowledges funding from the Irish Research Council for Science, Engineering and Technology (IRCSET) under the INSPIRE University, Japan.
DOI: 10.1364/OL.37.004762

Citations: 32
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