CARRIER COOLING ACCELERATED BY PHOTON CONFINEMENT IN NONLINEAR PHOTONIC BAND STRUCTURE

摘要

Carrier dynamics in absorption saturation in an InP/InGaAs nonlinear photonic band structure is investigated by femtosecond reflectance measurements. Carrier cooling which causes absorption saturation recovery is accelerated by the enhancement of carrier-carrier scattering. Theoretical analysis of the optical field distribution suggests that the confinement of a high density of photons near the surface of the nonlinear photonic band structure induces the enhancement of carrier-carrier scattering. The accelerated carrier relaxation with enhanced absorption sat-oration leads to an increase in the figure of merit in the third-order optical nonlinearities. [References: 8]