Journal
PHYSICAL REVIEW APPLIED
Volume 8, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevApplied.8.064018
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Funding
- National Basic Research Program of China [2014CB921003]
- National Natural Science Foundation of China [11721404, 91436101, 61675228]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB07030200, XDPB0803]
- CAS Interdisciplinary Innovation Team
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We report on high-resolution photoluminescence (PL) and photocurrent (PC) spectroscopies of a single self-assembled InAs/GaAs quantum dot (QD) embedded in an n-i-Schottky device with an applied magnetic field in Faraday and Voigt geometries. The single-QD PC spectrum of neutral exciton (X-0) is obtained by sweeping the bias-dependent X0 transition energy to achieve resonance with a fixed narrow-bandwidth laser through the quantum-confined Stark effect. With a magnetic field applied in Faraday geometry, the diamagnetic effect and the Zeeman splitting of X0 are observed both in PL and PC spectra. When the magnetic field is applied in Voigt geometry, the mixture of bright and dark states results in an observation of dark-exciton states, which are confirmed by the polarization-resolved PL and PC spectra.
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