Journal of Vacuum Science & Technology A Vacuum Surfaces and Films · 1988 · 12 citations · 0 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsOptoelectronicsSolid State PhysicsNonlinear Optical MaterialsNonlinear OpticsOptical Properties Of SemiconductorsOptical Properties Of SolidsThermal Properties Of SemiconductorsWide Band Gap SemiconductorsBand GapNonlinear Optical EffectsNonlinear Optical PropertiesNonlinear Optical SusceptibilityNonlinear SusceptibilityNonlinearityOptical NonlinearityThermalization
We have observed a third‐order nonlinear optical susceptibility of 1.5×10−3 esu in a Hg0.84Cd0.16Te epitaxial layer which has a small open band gap at 80 K. The relaxation time for the nonlinear effect is estimated to be 5 ps, and identified as the thermalization time of the electrons. The nonlinear mechanism is different from the band filling effect observed in larger band‐gap HgCdTe samples, as evidenced by the different intensity dependence of the nonlinearity.