Nondegenerate two-photon absorption in GaSb

  title={Nondegenerate two-photon absorption in GaSb},
  author={B. V. Olson and Michael P. Gehlsen and Thomas F. Boggess},
Abstract The nonlinear optical absorption of n -type GaSb at 77 K was investigated using time-resolved pump–probe techniques. By holding the pump wavelength constant and varying the probe wavelength, the nondegenerate two-photon absorption spectrum was measured for parallel and perpendicular polarization orientations between the pump and probe beams. The nondegenerate two-photon absorption coefficients, which were measured to be as large as 140 cm/GW, are found to be 2–3 times smaller for the… CONTINUE READING