Selectively enhanced emission and suppression in Si0.5 Ge 0.5 /Si multiple quantum wells by photonic crystals
Journal
Journal of Applied Physics
Journal Volume
106
Journal Issue
1
Date Issued
2009
Author(s)
CHIEH-HSIUNG KUAN
Wei, C.M.
Chen, T.T.
Chen, C.W.
Wang, C.H.
Chen, Y.F.
Peng, Y.H.
CHIEH-HSIUNG KUAN
Abstract
Selective enhancement and suppression of the photoluminescence arising from Si0.5Ge0.5/Si multiple quantum wells by photonic crystals (PCs) have been demonstrated. The formation of the stop band in PCs is designed to be a filter as well as a reflector. It is found that the self-assembled PCs are able to selectively enhance the luminescence of the type-II transitions at the interface between Si and Si0.5Ge0.5/Si layers and suppress the emission from Si. Our working principle shown here can be extended to many other material systems and should be very useful for creating high power solid-state emitters.
Type
journal article