Optical resonance tuning and polarization of thin-walled tubular microcavities

We present experimental and finite-difference time-domain simulation results on the tunability of optical resonant modes of spiral microtube cavities, rolled-up from square patterned SiO/SiO(2) thin nanomembranes on glass substrates. The peak positions of resonant TM modes shift to lower energies by...

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Bibliographic Details
Published in:Optics letters 2009-08, Vol.34 (15), p.2345-2347
Main Authors: BOLANOS QUINONES, Vladimir A, GAOSHAN HUANG, PLUMHOF, Johannes D, KIRAVITTAYA, Suwit, RASTELLI, Armando, YONGFENG MEI, SCHMIDT, Oliver G
Format: Article
Language:English
Subjects:
Computer-Aided Design
Equipment Design
Equipment Failure Analysis
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Micro- and nanooptical devices
Miniaturization
Models, Theoretical
Optical Devices
Optics
Physics
Refractometry - instrumentation
Reproducibility of Results
Sensitivity and Specificity
Transducers
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Summary:We present experimental and finite-difference time-domain simulation results on the tunability of optical resonant modes of spiral microtube cavities, rolled-up from square patterned SiO/SiO(2) thin nanomembranes on glass substrates. The peak positions of resonant TM modes shift to lower energies by coating the microtube wall with Al(2)O(3) monolayers, which is well described by simulations. Moreover, a second group of tunable resonant modes appears beyond a certain critical thickness of the coated Al(2)O(3). The polarization of this group of modes is TE, as we find out by a detailed analysis of the polarization-dependent photoluminescence spectra.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.34.002345