Biexcitons in semiconductor quantum dots

Journal Article · Mon Apr 09 04:00:00 EDT 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.1805· OSTI ID:6946316

Hu, Y Z; Koch, S W; Lindberg, M; Peyghambarian, N; Pollock, E L; Abraham, F F ^[1]

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1. Department of Physics, University of Arizona, Tucson, Arizona 85721 (USA) Optical Sciences Center, University of Arizona, Tucson, Arizona 87521 (USA) Lawrence Livermore National Laboratory, University of California, Livermore, California 94550 (USA) IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, California 95120 (USA)

Theoretical and experimental results are reported which provide the first evidence for biexciton states in semiconductor quantum dots. The theory predicts an increasing biexciton binding energy with decreasing dot size. Unlike bulk semiconductors, quantum dots have excited biexciton states which are stable. These biexciton states are observed as pronounced induced absorption features on the high-energy side of the bleached exciton resonances in femtosecond and nanosecond pump-probe experiments of quantum dots in glass matrices.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6946316
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 64:15; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
656000 -- Condensed Matter Physics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
BINDING ENERGY
BOUND STATE
CADMIUM COMPOUNDS
CADMIUM SULFIDES
CHALCOGENIDES
DATA
DIELECTRIC MATERIALS
ELECTRON-HOLE DROPLETS
ENERGY
EXCITONS
EXPERIMENTAL DATA
GLASS
INFORMATION
INORGANIC PHOSPHORS
MATERIALS
NUMERICAL DATA
PHOSPHORS
PLASMA
QUASI PARTICLES
SEMICONDUCTOR MATERIALS
SOLID-STATE PLASMA
SPECTRA
SPHERES
SULFIDES
SULFUR COMPOUNDS
THEORETICAL DATA