Phys. Rev. B 46, 13394–13399 (1992)Optically detected cyclotron resonance of GaAs quantum wells: Effective-mass measurements and offset effectsReceived 16 July 1992; published in the issue dated 15 November 1992 We have detected cyclotron resonance in a series of undoped GaAs quantum wells by modulating the photoluminescence intensity with far-infrared radiation. The conduction-band mass was measured for different quantum-well widths, and good agreement with a simple formula based on k⋅p theory is achieved. An offset was observed in the cyclotron-resonance energy, strongly dependent on well width. The interpretation is that monolayer-width fluctuations localize the carriers, giving an additional binding energy to the cyclotron-resonance transition. © 1992 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.46.13394
DOI:
10.1103/PhysRevB.46.13394
PACS:
71.25.Jd, 76.40.+b, 78.55.-m
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