Linear and two-photon absorption of rectangular and sawtooth HgTe/CdTe superlattices

Abstract
Theoretical studies of linear and two-photon absorption spectra of HgTe/CdTe superlattices with rectangular and sawtooth potential profiles are reported. Under optimum condition, the two-photon absorption coefficient can be higher than 1 cm/kW. The possible application of these materials as optical limiters near 10 μm wavelength is discussed.