Influence of electron-acoustic phonon scattering on off-resonant cavity feeding within a strongly coupled quantum-dot cavity system

Abstract

We present a medium-dependent quantum optics approach to describe the influence of electron-acoustic phonon coupling on the emission spectra of a strongly coupled quantum-dot cavity system. Using a canonical Hamiltonian for light quantization and a photon Green function formalism, phonons are included to all orders through the dot polarizability function obtained within the independent Boson model. We derive simple user-friendly analytical expressions for the linear quantum light spectrum, including the influence from both exciton and cavity-emission decay channels. In the regime of semiconductor cavity-QED, we study cavity emission for various exciton-cavity detunings and demonstrate rich spectral asymmetries as well as cavity-mode suppression and enhancement effects. Our technique is nonperturbative, and non-Markovian, and can be applied to study photon emission from a wide range of semiconductor quantum dot structures, including waveguides and coupled cavity arrays. We compare our theory directly to recent and apparently puzzling experimental data for a single site-controlled quantum dot in a photonic crystal cavity and show good agreement as a function of cavity-dot detuning and as a function of temperature.

Regular Paper, Submitted to PRB, Dec, 2010

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Cited by in corpus (6)

• Design and analysis of photonic crystal coupled cavity arrays for quantum simulation
• The role of phonons for exciton and biexciton generation in an optically driven quantum dot
• Microscopic theory of phonon-induced effects on semiconductor quantum dot decay dynamics in cavity QED
• Radiative coupling of quantum dots in photonic crystal structures
• Decoherence in semiconductor cavity QED systems due to phonon scattering
• Quenching of phonon-induced processes in quantum dots due to electron-hole asymmetries