We report a systematic optical spectroscopy
study of low density InAs quantum clusters (QCs) grown by molecular beam
epitaxy. The photoluminescence (PL) spectra show emission features of a wetting
layer (WL) which contains hybridized quantum well states. The low-energy tail
of the QCs' PL profile is actually an ensemble of some sharp lines, originating
from the emission of different exciton states (e.g. X, X*, XX*) in a single
quasi-three-dimensional (Q3D) cluster as detailed in the micro-PL spectra. The
temperature dependence of PL spectra indicates photocarrier distribution and
transport in the QC–WL system. Furthermore, this small InAs Q3D cluster is
integrated with a distributed Bragg reflector structure, and using optical
excitation creates a single photon source with the second-order correlation
function of g(2)(0) = 0.31 at 16 K.
For more information, please visit our website:
send us email at sales@powerwaywafer.com and powerwaymaterial@gmail.com
没有评论:
发表评论