Md Zain, A.R., Chong, H., Johnson, N. and De La Rue, R. (2007) Fine tuning of single row photonic crystal extended cavities embedded in photonic wire waveguides. In: SPIE Photonics: Design, Technology, and Packaging III, Canberra, Australia, 5-7 December 2007, (doi: 10.1117/12.758834)
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Publisher's URL: http://dx.doi.org/10.1117/12.758834
Abstract
This paper describes the realization of high quality factor (Q-factor) single row photonic crystal extended cavity structures embedded in 500 nm wide photonic wire waveguides. Cavities spacer lengths of between 2 μm and 9 μm have been inserted between two periodic mirrors with aperiodic tapering of the hole diameter and the spacing between holes. A Q-factor value of approximately 74,000 has been measured for a 5 μm long cavity at a selected resonance frequency. We have also demonstrated experimentally a tuning capability for the resonance frequency by means of small variations of the cavity length. A shift of approximately 10 nm in resonance frequency has been obtained for a 250 nm variation of the cavity length, both in simulation and in measured results. In addition, a free spectral range (FSR) in resonance frequency of between 20 nm and 30 nm has also been demonstrated for a small variation in the mirror hole diameter of approximately 20 nm. Tapering within and outside the cavity has produced a substantial increase in both the Q-factor and the optical transmission at resonance. Both 2D and 3D finite-difference time-domain (FDTD) computations have been used to simulate the device structures. Comparisons between the simulation and measured results show reasonably good agreement.
Item Type: | Conference Proceedings |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Johnson, Dr Nigel and De La Rue, Professor Richard |
Authors: | Md Zain, A.R., Chong, H., Johnson, N., and De La Rue, R. |
Subjects: | Q Science > QC Physics |
College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
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