We tune optical resonances in rolled-up microtube cavities by gradually modifying the tube structure through asymmetrical postdeposition of . Spectral blueshifts followed by redshifts of the resonant modes are observed in a thin-walled microtube (tube-I), which is attributed to a competition between shape deformation and effective increase of tube wall thickness. In contrast, only a monotonic redshift is detected when asymmetrical deposition is performed on a thick-walled microtube (tube-II). Distinct wavelength-dependent tuning was revealed in both kinds of tubes. Numerical calculations based on perturbation theory are carried out to explain and confirm the experimental results.
© 2011 Optical Society of AmericaFull Article | PDF Article
OSA Recommended Articles
Vladimir A. Bolaños Quiñones, Libo Ma, Shilong Li, Matthew Jorgensen, Suwit Kiravittaya, and Oliver G. Schmidt
Opt. Lett. 37(20) 4284-4286 (2012)
Adv. Opt. Photon. 3(4) 366-387 (2011)
Vladimir A. Bolaños Quiñones, Gaoshan Huang, Johannes D. Plumhof, Suwit Kiravittaya, Armando Rastelli, Yongfeng Mei, and Oliver G. Schmidt
Opt. Lett. 34(15) 2345-2347 (2009)