Scalable quantum photonic architectures demand highly efficient, high-purity single-photon sources, which can be frequency matched via external tuning. We demonstrate a single-photon source based on an InAs quantum dot embedded in a micropillar resonator, which is frequency tunable via externally applied stress. Our platform combines the advantages of a micropillar cavity and the piezo-strain-tuning technique enabling single-photon spontaneous emission enhancement via the Purcell effect and wavelength-tunable quantum dots (QDs). Our optomechanical platform has been implemented by integration of semiconductor-based QD-micropillars on a piezoelectric substrate. The fabricated device exhibits spontaneous emission enhancement with a Purcell factor of 4.4 ± 0.7 and allows for a pure triggered single-photon generation with g(2)(0) < 0.07 under resonant excitation. A quantum dot emission energy tuning range of 0.75 meV for 27 kV/cm applied to the piezosubstrate has been achieved. Our results pave the way toward the scalable implementation of single-photon quantum photonic technologies using optoelectronic devices.
Strain-Tunable Single-Photon Source Based on a Quantum Dot-Micropillar System / Moczala-Dusanowska, M.; Dusanowski, L.; Gerhardt, S.; He, Y. M.; Reindl, M.; Rastelli, A.; Trotta, R.; Gregersen, N.; Hofling, S.; Schneider, C.. - In: ACS PHOTONICS. - ISSN 2330-4022. - 6:8(2019), pp. 2025-2031. [10.1021/acsphotonics.9b00481]
Strain-Tunable Single-Photon Source Based on a Quantum Dot-Micropillar System
Trotta R.;
2019
Abstract
Scalable quantum photonic architectures demand highly efficient, high-purity single-photon sources, which can be frequency matched via external tuning. We demonstrate a single-photon source based on an InAs quantum dot embedded in a micropillar resonator, which is frequency tunable via externally applied stress. Our platform combines the advantages of a micropillar cavity and the piezo-strain-tuning technique enabling single-photon spontaneous emission enhancement via the Purcell effect and wavelength-tunable quantum dots (QDs). Our optomechanical platform has been implemented by integration of semiconductor-based QD-micropillars on a piezoelectric substrate. The fabricated device exhibits spontaneous emission enhancement with a Purcell factor of 4.4 ± 0.7 and allows for a pure triggered single-photon generation with g(2)(0) < 0.07 under resonant excitation. A quantum dot emission energy tuning range of 0.75 meV for 27 kV/cm applied to the piezosubstrate has been achieved. Our results pave the way toward the scalable implementation of single-photon quantum photonic technologies using optoelectronic devices.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
