“…Decrease in the bandgap can be achieved by alloying with SnTe. Recently, Pb 1 À x Sn x Te/CdTe (0rx r0.2) quantum wells and SnTe/PbTe/CdTe double quantum wells (DQWs), both grown on GaAs (0 0 1) by MBE, were studied [18][19][20]. In the first case optical measurements were accomplished at 300 K for different Sn content x, where the shift toward the lower energy with increasing x was observed.…”