Share Email Print

Proceedings Paper

Spontaneous emission enhancement in a microtube cavity with highly confined optical modes
Author(s): Y. P. Rakovich; S. Balakrishnan; Y. Gun'ko; T. S. Perova; A. Moore; J. F. Donegan
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

A detailed study of the photonic modes in microtube cavity of ~ 7-8 μm outer diameter is presented. We demonstrate a new route to the fabrication of individual microtubes with the maximum length of 200 μm, using a vacuum assisted wetting and filtration through a microchannel glass matrix. The microtubes were studied using micro-photoluminescence spectroscopy and luminescence lifetime imaging confocal microscopy. In the emission spectra of the microresonators we find periodic very narrow peaks corresponding to the whispering gallery modes of two orthogonal polarizations with quality factors upto 3200 at room temperature. In order to identify the peaks in the observed mode structure, we have adopted the boundary-value solution to the problem of scattering of electromagnetic waves by a dielectric microcylinder. A strong enhancement in photoluminescence decay rates at high excitation power suggest the occurrence of amplified spontaneous emission from a single microtube. The evanescent field in these photonic structures extends a couple of micrometers into the surroundings providing the possibility for efficient coupling to an external photonic device.

Paper Details

Date Published: 31 July 2007
PDF: 12 pages
Proc. SPIE 6728, ICONO 2007: Novel Photonics Materials; Optics and Optical Diagnostics of Nanostructures, 672806 (31 July 2007); doi: 10.1117/12.752145
Show Author Affiliations
Y. P. Rakovich, Trinity College Dublin (Ireland)
S. Balakrishnan, Trinity College Dublin (Ireland)
Y. Gun'ko, Trinity College Dublin (Ireland)
T. S. Perova, Trinity College Dublin (Ireland)
A. Moore, Trinity College Dublin (Ireland)
J. F. Donegan, Trinity College Dublin (Ireland)
CRANN Research Ctr., Trinity College Dublin (Ireland)

Published in SPIE Proceedings Vol. 6728:
ICONO 2007: Novel Photonics Materials; Optics and Optical Diagnostics of Nanostructures

© SPIE. Terms of Use
Back to Top