Quantitative analysis of the blue-green single-photon emission from a quantum dot in a thick tapered nanowire

Abstract

Quantum dots acting as single photon emitters in the blue-green range are fabricated and characterized at cryogenic temperature. They consist in CdSe dots inserted in (Zn,Mg)Se nanowires with a thick shell. Photoluminescence spectra, decay curves and autocorrelation functions were measured under nonresonant continuous-wave and pulsed excitation. An analytical approach is applied simultaneously to the decay curves and correlation functions. It allows a quantitative description of how these two quantities are affected by the exciton rise due to biexciton feeding, the bright exciton decay, the effect of the dark exciton, and the re-excitation between two laser pulses. Linewidths at our limit of resolution (200 $\mu$eV) are recorded. The reported correlation counts vary from a full control by re-excitation from traps, to a small contribution of re-excitation by mobile carriers or other QDs, as low as 5%.

References in corpus (12)

• Near optimal single photon sources in the solid state
• Triggered single photons from a quantum dot
• Photon antibunching in the fluorescence of individual color centers in diamond
• On-demand generation of background--free single photons from a solid-state source
• Subnanosecond spectral diffusion measurement using photon correlation
• A bright triggered twin-photon source in the solid state
• Monolithic integration of single photon sources via evanescent coupling of tapered InP nanowires to SiN waveguides
• Dark exciton optical spectroscopy of a semiconducting quantum dot embedded in a nanowire
• Experimental investigation of quantum key distribution over water channel
• Direct optical state preparation of the dark exciton in a quantum dot
• Enhanced Photon Extraction from a Nanowire Quantum Dot Using a Bottom-Up Photonic Shell
• Light-hole states in a strained quantum dot: numerical calculation and phenomenological models

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