Unconventional modes in lasers with spatially varying gain and loss

Li Ge, Y. D. Chong, S. Rotter, H. E. Türeci, and A. D. Stone
Phys. Rev. A 84, 023820 – Published 15 August 2011

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.

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  • Received 15 June 2011

DOI:https://doi.org/10.1103/PhysRevA.84.023820

©2011 American Physical Society

Authors & Affiliations

Li Ge1, Y. D. Chong2, S. Rotter3, H. E. Türeci1, and A. D. Stone2

  • 1Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA
  • 2Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA
  • 3Institute for Theoretical Physics, Vienna University of Technology, A-1040 Vienna, Austria

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Issue

Vol. 84, Iss. 2 — August 2011

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