The Effects of Multi-exciton Interactions on Optical Cavity Emission
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Authors
Qi, Xiaodong
Date
2012-07-31
Type
thesis
Language
eng
Keyword
Collective Emission , Optical Property , Quantum Dot , Optical Cavity , Cavity-QED , Exciton
Alternative Title
Abstract
This thesis presents a theoretical study of the collective effects of a large number
of photon emitters coupled to optical cavities. The ensemble effects are accounted
for by considering both the light emitting and scattering by the photon emitters. It
suggests that, to correctly estimate the emitters ensemble coupled cavity mode, it
is necessary to consider the existence of the excited excitons ensemble and optical
pumps. This thesis shows that optical pumps can excite more excitons and scattering
channels as pumping power increases. The change in exciton population can lead to
comprehensive spectral behaviors by changing the cavity spectral shapes, bandwidth
and resonance positions, through the inhomogeneous broadening and frequencies repulsion
effects of collective emissions. The existence of the exciton ensemble can also
enhance optical coupling effects between target excitons and the cavity mode. The
target exciton, which has a relatively large coupling strength and is close to the cavity
peak, can affect the properties of the background dipoles and their coupling to
the cavity. All these collective effects are sensitive to the number, the resonances
distribution, and the optical properties of the background excitons in the frequency
domain and the property of the target exciton, if any. This study provides a perspective on the control of the optical properties of cavities and individual excitons through collective excitation.
Description
Thesis (Master, Physics, Engineering Physics and Astronomy) -- Queen's University, 2012-07-30 14:51:15.914
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This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.