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Proceedings Paper

Two-dimensional photonic crystal lasers
Author(s): Mitsuru Yokoyama; Masahiro Imada; Susumu Noda
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Paper Abstract

In this article, we report on a two-dimensional (2D) photonic crystal (PhC) laser with a surface-emitting function. First of all, 2D PhC laser with triangular-lattice structure is described. A uniform 2D coherent lasing oscillation based on coupling of lightwaves propagating to six equivalent Gamma-X directions is successfully demonstrated. A large area 2D lasing oscillation over 300 micrometers in diameter and correspondingly a very narrow divergence angle less than 2 degree are observed. Then, the properties of a square-lattice PhC laser are described where the geometry of unit cell structure is designed appropriately to control the polarization mode of emitted light of the device. As the band diagram of the square-lattice photonic crystal is influenced by the unit cell structure, the electromagnetic field distributions at individual band edges are strongly modified and become unified or linear by changing the structure from a circular to an elliptical geometry. We fabricate a laser with a square-lattice PhC of which unit cell structures are elliptical. In spite of the very large diameter, single wavelength at 1.3micrometers and linear polarization mode are observed at representative positions. These results encourage us to realize lasers with desirable features such as perfect single-mode emission over a large area, high output power, and surface emission with a very narrow divergence angle.

Paper Details

Date Published: 22 May 2002
PDF: 11 pages
Proc. SPIE 4651, Novel In-Plane Semiconductor Lasers, (22 May 2002); doi: 10.1117/12.467950
Show Author Affiliations
Mitsuru Yokoyama, Kyoto Univ., Minolta Co., Ltd., and Japan Science and Technology Corp. (Japan)
Masahiro Imada, Kyoto Univ. and Japan Science and Technology Corp. (Japan)
Susumu Noda, Kyoto Univ. and Japan Science and Technology Corp. (Japan)

Published in SPIE Proceedings Vol. 4651:
Novel In-Plane Semiconductor Lasers
Jerry R. Meyer; Claire F. Gmachl, Editor(s)

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