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Proceedings Paper

Hexagonal micropillar cavities: multimode resonances and open-loop resonance linewidth broadening
Author(s): Ning Ma; Frankie Kim Lam Tung; Shing Fai Lui; Andrew W. Poon
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Paper Abstract

We report our proof-of-principle experiment and modeling of hexagonal micro-pillar cavities. A commercial hexagonal silica fiber (125μm plane-to-plane) was side-coupled perpendicularly with a Gaussian beam, thus the fiber acted as a μ-pillar cavity. We observed multimode resonances with typical Q ≈ 2,500 in the tangential directions that are ≈ 120° to the input-coupling cavity sidewall. The observed free spectral range (FSR) ≈ 4.5 nm is consistent with a six-bounce cavity round-trip length. By using wavefront-matching concept, the observed multimode resonances can be attributed to open-loop trajectories. The multiple wavefront-matched open-loop trajectories of the same ray incident angle can result in resonance linewidth broadening. We employed a k-space representation to calculate the hexagonal cavity normal mode locations.

Paper Details

Date Published: 25 July 2003
PDF: 8 pages
Proc. SPIE 4986, Physics and Simulation of Optoelectronic Devices XI, (25 July 2003); doi: 10.1117/12.474382
Show Author Affiliations
Ning Ma, Hong Kong Univ. of Science and Technology (China)
Frankie Kim Lam Tung, Hong Kong Univ. of Science and Technology (China)
Shing Fai Lui, Hong Kong Univ. of Science and Technology (China)
Andrew W. Poon, Hong Kong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 4986:
Physics and Simulation of Optoelectronic Devices XI
Marek Osinski; Hiroshi Amano; Peter Blood, Editor(s)

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