Unconventional modes in lasers with spatially varying gain and loss

Li Ge; Y. D. Chong; S. Rotter; H. E. Türeci; A. D. Stone

doi:10.1103/PhysRevA.84.023820

Unconventional modes in lasers with spatially varying gain and loss

Li Ge, Y. D. Chong, S. Rotter, H. E. Türeci, A. D. Stone

Research output: Contribution to journal › Article › peer-review

83 Scopus citations

Abstract

We discuss a class of lasing modes created by a spatially inhomogeneous gain profile. These lasing modes are "extra modes," in addition to, and very different from, conventional lasing modes, which arise from the passive cavity resonances. These new modes do not have high intensity across the entire gain region, but instead are localized at the gain boundary and throughout the gain-free region. They are surface modes, originating from the transmission resonances of the gain-free region. Using an S-matrix description we connect these surface modes to the lasing modes in PT-symmetric (balanced gain-loss) cavities.

Original language	English (US)
Article number	023820
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	84
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevA.84.023820
State	Published - Aug 15 2011

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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AU - Rotter, S.

AU - Türeci, H. E.

AU - Stone, A. D.

PY - 2011/8/15

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AB - We discuss a class of lasing modes created by a spatially inhomogeneous gain profile. These lasing modes are "extra modes," in addition to, and very different from, conventional lasing modes, which arise from the passive cavity resonances. These new modes do not have high intensity across the entire gain region, but instead are localized at the gain boundary and throughout the gain-free region. They are surface modes, originating from the transmission resonances of the gain-free region. Using an S-matrix description we connect these surface modes to the lasing modes in PT-symmetric (balanced gain-loss) cavities.

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Unconventional modes in lasers with spatially varying gain and loss

Abstract

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