Radio-frequency stress-induced modulation of CdTe/ZnTe quantum dots
arXiv:2005.13254 · doi:10.1063/5.0011124
Abstract
We demonstrate radio-frequency tuning of the energy of individual CdTe/ZnTe quantum dots (QDs) by Surface Acoustic Waves (SAWs). Despite the very weak piezoelectric coefficient of ZnTe, SAW in the GHz range can be launched on a ZnTe surface using interdigitated transducers deposited on a c-axis oriented ZnO layer grown on ZnTe containing CdTe QDs. The photoluminescence (PL) of individual QDs is used as a nanometer-scale sensor of the acoustic strain field. The energy of QDs is modulated by SAW in the GHz range and leads to characteristic broadening of time-integrated PL spectra. The dynamic modulation of the QD PL energy can also be detected in the time domain using phase-locked time domain spectroscopy. This technique is in particular used for monitoring complex local acoustic fields resulting from the superposition of two or more SAW pulses in a cavity. Under magnetic field, the dynamic spectral tuning of a single QD by SAW can be used to generate single photons with alternating circular polarization controlled in the GHz range.
References in corpus (10)
- Dynamic strain-mediated coupling of a single diamond spin to a mechanical resonator
- Resolved sidebands in a strain-coupled hybrid spin-oscillator system
- Phonon-mediated quantum state transfer and remote qubit entanglement
- Phonon-induced spin-spin interactions in diamond nanostructures: application to spin squeezing
- Subnanosecond spectral diffusion measurement using photon correlation
- Resolved Sideband Emission of InAs/GaAs Quantum Dots Strained by Surface Acoustic Waves
- Coupling a Surface Acoustic Wave to an Electron Spin in diamond via a Dark State
- Topical Review: Spins and mechanics in diamond
- Optically probing the fine structure of a single Mn atom in an InAs quantum dot
- Influence of non-equilibrium phonons on the spin dynamics of a single Cr atom