Cavity-quantum electrodynamics using a single InAs quantum dot in a microdisk structure

Abstract

We investigate cavity-quantum electrodynamics ͑QED͒ effects in an all-semiconductor nanostructure by tuning a single self-assembled InAs quantum dot ͑QD͒ into resonance with a high quality factor microdisk whispering gallery mode ͑WGM͒. The stronger temperature dependence of the QD single-exciton ͑1X͒ resonance allows us to change the relative energy of the WGM and the 1X transitions by varying the sample temperature. The two coupled resonances exhibit crossing behavior due to the weak coupling cavity-QED regime. We demonstrate exciton lifetime reduction by 6 due to the Purcell effect by tuning the QD into resonance with the WGM. Our experiments also show that single-exciton lifetime is independent of temperature up to 50 K.

Wavelength-sized GaAs optomechanical resonators with gigahertz frequency

“…This strong optomechanical interaction makes GaAs disks an interesting platform to study quantumoptomechanics phenomena at the single photon level, 24 especially since solid state single photons emitters in form of InAs quantum dots 25 are already being inserted in such disks in quantum electrodynamics experiments. 26,27 This work was supported by C-Nano Ile de France.…”

Local quantum dot tuning on photonic crystal chips

“…Spatial alignment can be achieved either by positioning the PC cavity on an already identified QD 5,6 or by relying on chance. For spectral alignment, there are a few techniques that can be used to modify the emission wavelength of InAs quantum dots: Stark shift, 7 Zeeman shift, 8 temperature tuning, 9 and strain tuning. 10 In this letter, we demonstrate a technique for independent control of QDs, employing structures with high-Q cavities whose temperature is controlled by laser beams.…”

A Single Photon Source Model Based On Quantum Dot And Microcavity

“…Light is circulating around the disk as whisperling gallery modes (WGM) [13,14,15,16]. Much of the laser characteristics [17,18,19,20,21,22,23], and cavity QED applications [24,25] were demonstrated. Since microdisk is a traveling wave resonator, it is possible to couple the light by a waveguide if WGM and waveguide is phase matched.…”