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IEICE Transactions on Electronics

Enhancement of Nonlinearity due to Cavity Effect of a Quantum Dot

Hiroshi Ajiki

Published Sep 1, 2005• 0 citations
Publisher

Abstract

The effect of a cavity on the third-order optical nonlinearity, is studied for a two-level system with excitation frequency ω 0 , as a function of the Q factor, coupling constant g, and longitudinal (γ 1 ) and pure transverse (γ 2 ) damping constants. The largest enhancement is found in the strong-coupling regime with γ 1 + 2γ 2 = ω 0 /2Q. Large enhancement is also achieved in the weak-coupling regime satisfying the condition ω 0 /Q = (g 2 /γ 1 )[ 1 + 8γ 1 /(γ 1 + 2γ 2 ) - 1], and the intensity depends on damping constants only. The calculation is based on the cavity QED because the semiclassical treatment of the cavity quasimode leads to incorrect optical nonlinearity.

DOI
10.1093/ietele/e88-c.9.1803

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