Figure 4.

Transmission spectra for a PDQW heterostructure with constant well width (dA = 10LA) and inter-well separation (dW = 5LB). The outer photonic barrier thickness is varied as dB = 10LB(upper plot) and dB = 15LB(lower plot). As the outer barrier thickness is increased, the quality factors of the transmitted resonant peaks increase

Cox and Singh Nanoscale Research Letters 2010 5:484   doi:10.1007/s11671-010-9546-9