Transient InSb spin-flip laser - a measurement of T1

A double pulse spin-flip laser technique has been used to evaluate the InSb conduction electron spin-relaxation time T₁; a value of 60 ± 20 nsec (n = 1.2 × 10¹⁶cm^?3, H = 60 kG, T = 20 K)is obtained. The effects of electron heating by free carrier absorption are measured and an energy relaxation time of 20–40 nsec is obtained. A calculation of T₁ based on ionized impurity scattering in the quantum limit regime is in order of magnitude agreement with the experiment.