Radiative behavior of negatively charged excitons in CdTe-based quantum wells: A spectral and temporal analysis

Using reflectivity and picosecond time-resolved photoluminescence, we have studied the intrinsic optical properties of negatively charged excitons in modulation doped CdTe quantum wells. In emission, we observe simultaneously a low energy exponential tail in the charged exciton spectral line and a linear increase of its radiative lifetime with temperature. In absorption, we find a consistent decrease of the charged exciton oscillator strength with temperature. For low electron concentrations these observations are well reproduced by a model of delocalized and thermalized three-particle complexes. The model takes into account the recoil momentum of the electron during the charged exciton optical transition. It is further found to compare well with lifetime measurements up to high carrier concentrations. Small deviations from the theoretical predictions occur only below 7 K due to localization effects and for the highest carrier concentration of n(e)similar to2 x 10(11) cm(-2).


Published in:
Physical Review B, 62, 24, 16310-16313
Year:
2000
ISSN:
1098-0121
Keywords:
Note:
Swiss Fed Inst Technol, Dept Phys, CH-1015 Lausanne, Switzerland. Humboldt Univ, Inst Phys, AG Halbleitertheorie, Berlin, Germany. Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland. Ciulin, V, Swiss Fed Inst Technol, Dept Phys, CH-1015 Lausanne, Switzerland.
ISI Document Delivery No.: 390QL
Times Cited: 33
Cited Reference Count: 27
Cited References:
ASTAKHOV GV, 1999, PHYS REV B, V60, P8485
BRINKMANN D, 1999, PHYS REV B, V60, P4474
CITRIN DS, 1993, PHYS REV B, V47, P3832
DEVEAUD B, 1991, PHYS REV LETT, V67, P2355
ESSER A, 2000, PHYS REV B, V62, P8232
ESSER A, 2000, PHYS STATUS SOLIDI A, V178, P489
ESSER A, 2000, PHYS STATUS SOLIDI B, V221, P281
EYTAN G, 1998, PHYS REV LETT, V81, P1666
FINKELSTEIN G, 1995, PHYS REV LETT, V74, P976
FINKELSTEIN G, 1998, PHYS REV B, V58, P12637
HOGG RA, 1999, PHYSICA B, V272, P412
HUARD V, 2000, PHYS REV LETT, V84, P187
IVCHENKO EL, 1992, PHYS REV B, V46, P7713
KHENG K, 1993, PHYS REV LETT, V71, P1752
KOSSACKI P, 1999, PHYS REV B, V60, P16018
KOSSACKI P, 2000, J CRYST GROWTH, V214, P837
KUDELSKI A, 1999, SOLID STATE COMMUN, V112, P173
KUTROWSKI M, UNPUB
MANASSEN A, 1996, PHYS REV B, V54, P10609
NIMTZ G, 1982, LANDOLTBORNSTEIN, V176, P226
RON A, 1996, SOLID STATE COMMUN, V97, P741
SHIELDS AJ, 1995, PHYS REV B, V51, P18049
STEBE B, 1998, PHYS REV B, V58, P9926
VANELLE E, 2000, PHYS REV B, V62, P2696
VOLKOV OV, 1997, JETP LETT+, V66, P766
WOJTOWICZ T, 1998, APPL PHYS LETT, V73, P1379
WOJTOWICZ T, 1999, PHYS REV B, V59, P10437
Other identifiers:
Laboratories:




 Record created 2007-08-31, last modified 2018-03-17


Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)