Cross-polarization extinction enhancement and spin-orbit coupling of light for quantum-dot cavity-QED spectroscopy

Abstract

Resonant laser spectroscopy is essential for the characterization, operation, and manipulation of single quantum systems such as semiconductor quantum dots. The separation of the weak resonance fluorescence from the excitation laser is key for high-quality single- and entangled photon sources. This is often achieved by cross-polarization laser extinction, which is limited by the quality of the optical elements. Recently, it was discovered that Fresnel-reflection birefringence in combination with single-mode filtering counteracting spin-orbit coupling effects enables a three-order of magnitude improvement of polarization extinction [PRX 11, 021007 (2021)]. Here, we first investigate multiple reflections and analyze beam reshaping, and observe that the single-reflection extinction enhancement is optimal. We then demonstrate this method for cross-polarization extinction enhancement for a resonantly excited semiconductor quantum dot in a birefringent optical micro cavity, and observe a 10x improvement of single-photon contrast.

7 pages, 6 figures

References in corpus (5)

• Conservation of Angular Momentum, Transverse Shift, and Spin Hall Effect in Reflection and Refraction of Electromagnetic Wave Packet
• Goos-Hänchen and Imbert-Fedorov beam shifts: An overview
• Role of beam propagation in Goos-Hänchen and Imbert-Fedorov shifts
• Generalized shifts and weak values for polarization components of reflected light beams
• Suspension of the fiber mode-cleaner launcher and measurement of the high extinction-ratio (10^{-9}) ellipsometer for the Q & A experiment

Cited by in corpus (4)

• Picosecond laser pulses for quantum dot-microcavity based single photon generation by cascaded electro-optic modulation of a narrow-linewidth laser
• Resonant two-laser spin-state spectroscopy of a negatively charged quantum dot-microcavity system with a cold permanent magnet
• Optimizing the quantum interference between single photons and local oscillator with photon correlations
• Microwave Controlled Photonic Spin Hall Effect in Atomic System and Microwave Electrometry