Characteristics of dielectric-band modified single-cell photonic crystal lasers

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We demonstrate new types of dielectric-band photonic crystal lasers in a two-dimensional modified single-cell cavity with enlarged air holes. Finite-difference time-domain simulations performed in real and Fourier spaces show that the dielectric-band cavity modes originating from the first band edge point in the dielectric band have mode patterns that are distinguishable from conventional air-band cavity modes. In our experiment, the observed multimode lasing peaks are identified as the hexapole and the monopole dielectric-band cavity modes through the spectral positions and mode images. The thresholds of these lasers are measured as similar to 340 mu W and similar to 450 mu W, respectively, at room temperature. In addition, using the simulation based on the actual fabricated structures, quality factors and mode volumes are computed as 4900 and 1.09 (lambda/n)(3) for the hexapole mode, and 4300 and 2.27 (lambda/n)(3) for the monopole mode, respectively. (C) 2009 Optical Society of America
Publisher
OPTICAL SOC AMER
Issue Date
2009-02
Language
English
Article Type
Article
Keywords

HIGH-QUALITY-FACTOR; HIGH-Q CAVITIES; WAVE-GUIDE; SPACE DESIGN; QUANTUM-DOT; NANOCAVITY; MODES

Citation

OPTICS EXPRESS, v.17, no.3, pp.1679 - 1690

ISSN
1094-4087
DOI
10.1364/OE.17.001679
URI
http://hdl.handle.net/10203/20329
Appears in Collection
PH-Journal Papers(저널논문)
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