Probing excitonic nonlinearities in quantum wires
We report on the experimental observation of excitonic molecules (biexcitons) in high-quality V-shaped quantum wires. By means of spatially resolved near-field photoluminescence spectroscopy, first we unambiguously isolate excitons with a one-dimensional character, and secondly we present the optical transition from 1D biexciton to 1D exciton as a function of excitation power density. The density of these biexcitonic molecules is shown to increase superlinearly compared to the linear variation of exciton density.
WOS:000089788000048
2000
221
1
277
280
Swiss Fed Inst Technol, Dept Phys, CH-1015 Lausanne, Switzerland. Electrotech Lab, Tsukuba, Ibaraki 305, Japan. Japan Sci & Technol Corp, Tsukuba, Ibaraki 305, Japan. Crottini, A, Swiss Fed Inst Technol, Dept Phys, CH-1015 Lausanne, Switzerland.
ISI Document Delivery No.: 362PZ
Cited Reference Count: 11
Cited References:
AMBIGAPATHY R, 1997, PHYS REV LETT, V78, P3579
BAARS T, 1998, PHYS REV B, V58, P1750
CROTTINI A, UNPUB
HASEN J, 1997, NATURE, V390, P54
IVANOV AL, 1998, PHYS REP, V296, P273
KAPON E, 1989, PHYS REV LETT, V63, P430
KIM JC, 1994, PHYS REV B, V50, P15099
VOLIOTIS V, 1998, SOLID STATE ELECT, V42, P1271
VOULLIOZ F, 1998, PHYS REV B, V57, P12378
WANG XL, 1995, APPL PHYS LETT, V66, P1506
WEGSCHEIDER W, 1993, PHYS REV LETT, V71, P4071
REVIEWED
EPFL