Excitation spectroscopy of single quantum dots at tunable positive, neutral and negative charge states

Abstract

We present a comprehensive study of the optical transitions and selection rules of variably charged single self-assembled InAs/GaAs quantum dots. We apply high resolution polarization sensitive photoluminescence excitation spectroscopy to the same quantum dot for three different charge states: neutral and negatively or positively charged by one additional electron or hole. From the detailed analysis of the excitation spectra, a full understanding of the single-carrier energy levels and the interactions between carriers in these levels is extracted for the first time.

8 pages, 5 figures

References in corpus (3)

• Entangled Photon Pairs from Semiconductor Quantum Dots
• Polarization sensitive spectroscopy of charged Quantum Dots
• Selective Optical Charge Generation, Storage and Readout in a Single Self Assembled Quantum Dot

Cited by in corpus (5)

• Accessing the dark exciton spin in deterministic quantum-dot microlenses
• Path-dependent initialization of a single quantum dot exciton spin in a nano-photonic waveguide
• Single dot photoluminescence excitation spectroscopy in the telecommunication spectral range
• Coherent population trapping combined with cycling transitions for quantum dot hole spins using triplet trion states
• Complete state tomography of a quantum dot confined spin qubit