Increased sensitivity of spin noise spectroscopy using homodyne detection in $n$-doped GaAs

Abstract

We implement the homodyne detection scheme for an increase of the polarimetric sensitivity in spin noise spectroscopy. Controlling the laser intensity of the local oscillator, which is guided around the sample and does not perturb the measured spin system, we are able to improve the signal-to-noise ratio. The opportunity of additional amplification of the measured signal strength allows us to reduce the probe laser intensity incident onto the sample and therefore to approach the non-perturbative regime. The efficiency of this scheme with signal enhancement by more than a factor of 3 at low probe powers is demonstrated on bulk $n$-doped GaAs where the reduced electron-spin relaxation rate is shown experimentally. Additionally, the control of the optical phase provides us with the possibility to switch between the measurement of Faraday rotation and ellipticity without changes in the optical setup.

arXiv comment9 pages, 4 figures, Minor revisions, New References

References in corpus (23)

• Charge noise and spin noise in a semiconductor quantum device
• Spectroscopy of spontaneous spin noise as a probe of spin dynamics and magnetic resonance
• Spin noise spectroscopy in GaAs
• Spin noise of electrons and holes in self-assembled quantum dots
• The Theory of Spin Noise Spectroscopy: A Review
• Pump-Probe Faraday Rotation and Ellipticity in an Ensemble of Singly Charged Quantum Dots
• Optical measurements of spin noise as a high resolution spectroscopic tool
• "Listening" to the spin noise of conduction electrons in bulk n:GaAs
• Squeezed-light spin noise spectroscopy
• Spin noise spectroscopy of a single-quantum-well microcavity
• Extended pump-probe Faraday rotation spectroscopy of the submicrosecond electron spin dynamics in n-type GaAs
• Linear optics, Raman scattering, and spin noise spectroscopy
• A quantitative study of spin noise spectroscopy in a classical gas of ${}^{41}$K atoms
• Spin dynamics of electrons and holes in InGaAs/GaAs quantum wells at milliKelvin temperatures
• Atomic-like spin noise in solid-state demonstrated with manganese in cadmium telluride
• Resources of polarimetric sensitivity in spin noise spectroscopy
• Sensitivity, quantum limits, and quantum enhancement of noise spectroscopies
• Optical amplification of spin noise spectroscopy via homodyne detection
• Measurement back-action and spin noise spectroscopy in a charged cavity-QED device in the strong coupling regime
• Electron charge and spin delocalization revealed in the optically probed longitudinal and transverse spin dynamics in $n$-GaAs
• Spin noise spectroscopy of randomly moving spins in the model of light scattering: Two-beam arrangement
• Optics of spin-noise-induced gyrotropy of asymmetric microcavity
• Noise spectroscopy of optical microcavity

Cited by in corpus (8)

• Gigantic spin-noise gain enables magnetic resonance spectroscopy of impurity crystals
• Detection and amplification of spin noise using scattered laser light in a quantum-dot microcavity
• Invariants in the paramagnetic resonance spectra of impurity crystals
• Birefringence and dichroism effects in the spin noise spectra of a spin-1 system
• Simultaneous measurements of nuclear spin heat capacity, temperature and relaxation in GaAs microstructures
• Unveiling the electron-nuclear spin dynamics in an n-doped InGaAs epilayer by spin noise spectroscopy
• Resonant spin amplification meets electron spin resonance in $n$-GaAs
• Optical detection of electron spin dynamics driven by fast variations of a magnetic field: a simple method to measure $T_1$, $T_2$, and $T_2^{\ast }$ in semiconductors