NDLI: Lasing spectra and thresholds of the whispering-gallery modes in a circular dielectric microcavity

Content Provider	IEEE Xplore Digital Library
Author	Smotrova, E.I. Nosich, A.I.
Copyright Year	2003
Description	Author affiliation: Inst. of Radiophys. & Electron., Acad. of Sci., Kharkov, Ukraine (Smotrova, E.I.; Nosich, A.I.)
Abstract	Microlaser designs based on high-reflectivity whispering-gallery (WG) modes around the edge of a thin semiconductor microdisk have been studied since the early 1990's. Optical pump is normally arranged with a wide external laser beam, hence the gain over the disk can be considered as uniform. The same, although less justified, holds for injection lasers. Mathematically, these modes are the source-free solutions of the 3-D Maxwell equations, however if the disk thickness is only a fraction of the wavelength the modes can be studied in 2-D formulation. Still surprisingly, it appears that accurate study of the circular-cavity lasing modes is absent, as the simplified analysis of Frateschi et al. (1995), was based on rough assumptions, and FDTD simulations of Fujita et al. (1999) did not address the modes directly. In this paper we study the lasing eigenvalue problem (LEP) for a circular resonator. We look for the non-attenuating time-harmonic electromagnetic field /spl sim/e/sup -ikct/, k=Rek>0 in and out of a dielectric circular cylinder of radius a. We assume that the field does not vary along the z axis and can be characterized by a scalar function U, which represents either E/sub z/ or H/sub z/ component depending on the polarization.
Sponsorship	Ministr. Infrastructure & State Committee for Sci. Res
Starting Page	315
Ending Page	318
File Size	184687
Page Count	4
File Format	PDF
ISBN	0780378164
DOI	10.1109/ICTON.2003.1264643
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-06-29
Publisher Place	Poland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Whispering gallery modes Dielectrics Microcavities Optical resonators Laser excitation Laser modes Pump lasers Semiconductor lasers Optical pumping Laser beams
Content Type	Text
Resource Type	Article

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