Gain narrowing in few-atom systems

Abstract

Using a density matrix approach, we study the simplest systems that display both gain and feedback: clusters of 2 to 5 atoms, one of which is pumped. The other atoms supply feedback through multiple scattering of light. We show that, if the atoms are in each other's near-field, the system exhibits large gain narrowing and spectral mode redistribution. The observed phenomena are more pronounced if the feedback is enhanced. Our system is to our knowledge the simplest exactly solvable microscopic system which shows the approach to laser oscillation.

References in corpus (3)

• Photon statistics from coupled quantum dots
• Magnetic Field Enhanced Coherence Length in Cold Atomic Gases
• Light scattering from three-level systems: The T-matrix of a point-dipole with gain

Cited by in corpus (10)

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• Pump-Controlled Directional Light Emission from Random Lasers
• Cooperative Fluorescence from a Strongly Driven Dilute Cloud of Atoms
• Photon-Mediated Interaction between Two Distant Atoms
• Euclidean matrix theory of random lasing in a cloud of cold atoms
• Non-linear optics with two trapped atoms
• Creation of New Lasing Modes with Spatially Nonuniform Gain
• Collective effects of multi-scatterer on coherent propagation of photon in a two dimensional network
• Coherent inelastic backscattering of laser light from three isotropic atoms
• Rigorous derivation of the triple scattering signal from single-atom responses