RESUMO
We demonstrate an integrated autocorrelator based on two superconducting single-photon detectors patterned on top of a GaAs ridge waveguide. This device enables the on-chip measurement of the second-order intensity correlation function g(2)(τ). A polarization-independent device quantum efficiency in the 1% range is reported, with a timing jitter of 88 ps at 1300 nm. g(2)(τ) measurements of continuous-wave and pulsed laser excitations are demonstrated with no measurable crosstalk within our measurement accuracy.
Assuntos
Arsenicais/química , Arsenicais/efeitos da radiação , Gálio/química , Gálio/efeitos da radiação , Fotometria/instrumentação , Ressonância de Plasmônio de Superfície/instrumentação , Condutividade Elétrica , Desenho de Equipamento , Análise de Falha de Equipamento , Luz , Estatística como Assunto , Integração de SistemasRESUMO
We demonstrate tunable on-chip single photon sources using the Stark tuning of single quantum dot (QD) excitonic transitions in short photonic crystal waveguides (PhC WGs). The emission of single QDs can be tuned in real-time by 9 nm with an applied bias voltage less than 2V. Due to a reshaped density of optical modes in the PhC WG, a large coupling efficiency ß ≥ 65%to the waveguide mode is maintained across a wavelength range of 5 nm. When the QD is resonant with the Fabry-Perot mode of the PhC WG, a strong enhancement of spontaneous emission is observed leading to a maximum coupling efficiency ß = 88%. These results represent an important step towards the scalable integration of single photon sources in quantum photonic integrated circuits.