Contrast in transmission spectroscopy of a single quantum dot

Abstract

We perform transmission spectroscopy on single quantum dots and examine the effects of a resident carriers spin, the incident laser spot size, polarization, and power on the experimental contrast. We demonstrate a factor of 4 improvement in the maximum contrast by using a solid immersion lens to decrease the spot area. This increase yields a maximum signal to noise ratio of 2000 Hz-1/2, which will allow for MHz detection frequencies. We anticipate that this improvement will allow further investigation of spectral fluctuation and open up the feasibility for an all-optical read-out of an electron spin in a quantum dot.

References in corpus (5)

• Voltage-Controlled Optics of a Quantum Dot
• Observation of Faraday rotation from a single confined spin
• Recipes for spin-based quantum computing
• Absorption and photoluminescence spectroscopy on a single self-assembled charge-tunable quantum dot
• Absorptive and dispersive optical responses of excitons in a single quantum dot

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• Scalable fabrication of hemispherical solid immersion lenses in silicon carbide through grayscale hard-mask lithography
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• 3D printed micro-optics for quantum technology: Optimized coupling of single quantum dot emission into a single mode fiber