Determination of band offset using continuous-wave two-photon excitation in a ZnSe quantum-well waveguide structure

Journal Article · Fri Jun 15 00:00:00 EDT 2001 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.63.235319· OSTI ID:40203634

Wagner, H P; Kuhnelt, M; Wenisch, H; Hommel, D

We investigate exciton subband transitions in a ZnSe/Zn{sub 1{minus}x}Mg{sub x}S{sub y}Se{sub 1{minus}y} multiple-quantum-well grown by molecular beam epitaxy waveguide structure by photoluminescence excitation and two-photon excitation spectroscopy. A continuous-wave two-photon absorption is realized by an efficient waveguide coupling scheme within the cryostat. From the energetic position of the 1s and 2p exciton transitions exciton binding energies of 33 and 38 meV are deduced for heavy and light-hole excitons, respectively. With these values we are able to determine the strain free and dimensionless conduction-band-offset parameter to Q{sub c}=0.3{+-}0.1.

• Sponsoring Organization: (US)
• OSTI ID: 40203634
• Journal Information: Physical Review B, Vol. 63, Issue 23; Other Information: DOI: 10.1103/PhysRevB.63.235319; Othernumber: PRBMDO000063000023235319000001; 062119PRB; PBD: 15 Jun 2001; ISSN 0163-1829
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
EXCITATION
EXCITONS
MOLECULAR BEAM EPITAXY
PHOTOLUMINESCENCE
SPECTROSCOPY
STRAINS
WAVEGUIDES