Enhancement of Nonlinearity due to Cavity Effect of a Quantum Dot

Hiroshi AJIKI

Publication
IEICE TRANSACTIONS on Electronics   Vol.E88-C    No.9    pp.1803-1808
Publication Date: 2005/09/01
Online ISSN: 
DOI: 10.1093/ietele/e88-c.9.1803
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Nanophotonics and Related Techniques)
Category: 
Keyword: 
cavity,  optical nonlinearity,  cavity quasimode,  Jaynes-Cummings model,  cavity QED,  

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Summary: 
The effect of a cavity on the third-order optical nonlinearity, is studied for a two-level system with excitation frequency ω0, as a function of the Q factor, coupling constant g, and longitudinal (γ1) and pure transverse (γ2) damping constants. The largest enhancement is found in the strong-coupling regime with γ1+2γ2=ω0/2Q. Large enhancement is also achieved in the weak-coupling regime satisfying the condition , 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.