Fabrication and characterization of point defect photonic crystal nanocavities at telecom wavelength

The development of semiconductor based single photon sources at telecom wavelength is a fundamental need for applications like quantum cryptog. and quantum computing. The coupling of a single photon emitter, such as a quantum dot (QD) to a cavity in the weak coupling regime, provides enhanced spontaneous emission rate and it is known as Purcell effect. We report our progress in the fabrication and optimization of photonic crystal nanocavities with Q up to 104 on a GaAs membrane with embedded low d. (20 dots/micro m2) QDs emitting at l = 1300 nm. [on SciFinder (R)