Effective mass and exciton binding energy in ordered (Al)GaInP quantum wells evaluated by derivative of reflectivity

Autor:	Rolf Winterhoff, Ferdinand Scholz, Jun Shao, Achim Dörnen
Rok vydání:	2002
Předmět:	Effective mass (solid-state physics) Exciton binding energy Condensed Matter::Other Chemistry Oscillator strength Exciton General Physics and Astronomy Atomic physics Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Spectroscopy Reflectivity Quantum well Biexciton
Zdroj:	Journal of Applied Physics. 91:2553-2555
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.1436553
Popis:	Low-temperature (1.8 K) magneto-optical reflectivity spectroscopy together with derivative operation has been employed in evaluating the reduced effective mass and exciton binding energy in GaxIn1−xP/AlGaInP quantum wells (QWs). Low uncertainty of the method in identifying excitonic transition energy (⩽0.3 meV) enables a simultaneous determination of both the heavy-hole (hh) and light-hole (lh) excitons in the QWs with ordering. The obtained effective masses manifest to be ordering-dependent, the dependence of which is compared with that reported for the GaInP2 bulk material. Results from the lattice-matched QWs suggest that the magnetic-field enhancement of the oscillator strength is stronger for the hh exciton than for the lh exciton.
Databáze:	OpenAIRE
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