Interference effect in the resonant emission of a semiconductor microcavity

Optical Characterization of Semiconductor Microcavities by Spatially Resolved Imaging and Resonant Rayleigh Scattering

“…In fact disorder plays a crucial role in the case of a QW embedded in a resonant optical cavity, termed a semiconductor MC, where the coherent exciton polariton is the basic physical picture. Therefore, resonant Rayleigh scattering (RRS), which arises directly from disorder, has recently received increasing attention [4][5][6][7][8][9][10]. The coupling between two-dimensional exciton and photon modes in a MC gives rise to several unique features of the RRS.…”

Decoherence Dynamics of Localized States in a Single GaAs/AlGaAs Quantum Ring

“…Interferometric correlation spectroscopy is a very useful technique to investigate coherence dynamics, and its Fourier‐transformed spectrum provides a high‐resolution lineshape, where coherence time ( T 2 ) is directly measured, and a homogeneous linewidth ( Г = 2 ħ / T 2 ) is estimated. Recently, this technique has uncovered that the spectral diffusion in quantum dots (QDs) is associated with the fluctuating QD environment . While three dimensional electronic confinement of QRs seems advantageous to preserve quantum coherence, the exciton coherence in QDs can also be affected by barrier or embedding medium.…”

“…For example, PL spectrum at three different fine delay times in Figure (b) show different intensities as a consequence of interference. Therefore, the integration of a full PL spectral area shows oscillations for t , and the temporal interferogram decay can be described as …”

“…According to the stochastic model for an optical system coupled to fluctuating charge traps, the Fourier transform of the intensity spectrum is given by where the emission energy becomes randomized with a characteristic time τ over a range of spectral modulation amplitude Σ. Provided that the quantum confinement Stark effect of randomly trapped carriers results in a slow modulation of the optical line shape, the interferogram envelope was known to decay in a non‐exponential manner.…”

“…Recently, this technique has uncovered that the spectral diffusion in quantum dots (QDs) is associated with the fluctuating QD environment. [7][8][9][10][11] While three dimensional electronic confinement of QRs seems advantageous to preserve quantum coherence, the exciton coherence in QDs can also be affected by barrier or embedding medium. When impurities and defects are present in the vicinity of a QR, the trapped charges cause a micro-electric field in a random manner.…”