“…[23][24][25] The selection rules are that for (110) CdTe the TO mode is allowed, but the LO is not. [23,26]CdTe with (111) orientation can have both the TO and LO mode. The post annealed CdTe appears to have a small peak at the 169 cm -1 shift, but this peak is notprominent as in the CdTe grown directly at 400 ºC.…”