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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 2 — Jan. 15, 2014
  • pp: 189–192

Rolled-up TiO2 optical microcavities for telecom and visible photonics

Abbas Madani, Stefan Böttner, Matthew R. Jorgensen, and Oliver G. Schmidt  »View Author Affiliations


Optics Letters, Vol. 39, Issue 2, pp. 189-192 (2014)
http://dx.doi.org/10.1364/OL.39.000189


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Abstract

The fabrication of high-quality-factor polycrystalline TiO2 vertically rolled-up microcavities (VRUMs) by the controlled release of differentially strained TiO2 bilayered nanomembranes, operating at both telecom and visible wavelengths, is reported. Optical characterization of these resonators reveals quality factors as high as 3.8×103 in the telecom wavelength range (1520–1570 nm) by interfacing a TiO2 VRUMs with a tapered optical fiber. In addition, a splitting in the fundamental modes is experimentally observed due to the broken rotational symmetry in our resonators. This mode splitting indicates coupling between clockwise and counterclockwise traveling whispering gallery modes of the VRUMs. Moreover, we show that our biocompatible rolled-up TiO2 resonators function at several positions along the tube, making them promising candidates for multiplexing and biosensing applications.

© 2014 Optical Society of America

OCIS Codes
(130.1750) Integrated optics : Components
(230.4000) Optical devices : Microstructure fabrication
(230.5750) Optical devices : Resonators
(260.5740) Physical optics : Resonance
(140.3945) Lasers and laser optics : Microcavities
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Optical Devices

History
Original Manuscript: October 17, 2013
Revised Manuscript: November 29, 2013
Manuscript Accepted: November 29, 2013
Published: January 3, 2014

Citation
Abbas Madani, Stefan Böttner, Matthew R. Jorgensen, and Oliver G. Schmidt, "Rolled-up TiO2 optical microcavities for telecom and visible photonics," Opt. Lett. 39, 189-192 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-2-189


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