VARIATIONAL CALCULATION OF FANO LINEWIDTH - APPLICATION TO EXCITONS IN QUANTUM-WELLS

被引:14
作者
PASQUARELLO, A [1 ]
ANDREANI, LC [1 ]
机构
[1] PHB ECUBLENS,INST ROMAND RECH NUMER PHYS MAT,CH-1015 LAUSANNE,SWITZERLAND
来源
PHYSICAL REVIEW B | 1991年 / 44卷 / 07期
关键词
D O I
10.1103/PhysRevB.44.3162
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A procedure for calculating the resonance width of a state degenerate with a continuum is proposed. It is based on a diagonalization of the Hamiltonian on a finite variational basis followed by application of the Fano theory on the resulting eigenstates. The method is first tested on a one-dimensional model that admits an exact solution, and then applied to the problem of the light-hole (LH) exciton in narrow GaAs-Ga(1-x)Al(x)As quantum wells. The resonance width of the LH exciton is found to be of the order of a meV, and to increase as the well width is reduced.
引用
收藏
页码:3162 / 3167
页数:6
相关论文
共 13 条
  • [1] CALCULATIONS OF HOLE SUBBANDS IN SEMICONDUCTOR QUANTUM WELLS AND SUPERLATTICES
    ALTARELLI, M
    EKENBERG, U
    FASOLINO, A
    [J]. PHYSICAL REVIEW B, 1985, 32 (08) : 5138 - 5143
  • [2] ACCURATE THEORY OF EXCITONS IN GAAS-GA1-XALXAS QUANTUM-WELLS
    ANDREANI, LC
    PASQUARELLO, A
    [J]. PHYSICAL REVIEW B, 1990, 42 (14): : 8928 - 8938
  • [3] EFFECT OF SUBBAND COUPLING ON EXCITON BINDING-ENERGIES AND OSCILLATOR-STRENGTHS IN GAAS-GA1-XALXAS QUANTUM WELLS
    ANDREANI, LC
    PASQUARELLO, A
    [J]. EUROPHYSICS LETTERS, 1988, 6 (03): : 259 - 264
  • [4] ENERGY LEVELS OF DIRECT EXCITONS IN SEMICONDUCTORS WITH DEGENERATE BANDS
    BALDERESCHI, A
    LIPARI, NO
    [J]. PHYSICAL REVIEW B-SOLID STATE, 1971, 3 (02): : 439 - +
  • [5] RESONANCE BROADENING OF THE LIGHT-HOLE EXCITON IN GAAS/ALXGA1-XAS QUANTUM WELLS
    BROIDO, DA
    KOTELES, ES
    JAGANNATH, C
    CHI, JY
    [J]. PHYSICAL REVIEW B, 1988, 37 (05): : 2725 - 2728
  • [6] MIXING OF EXCITONS AND CONTINUUM STATES IN QUANTUM-WELLS
    BROIDO, DA
    YANG, SRE
    [J]. PHYSICAL REVIEW B, 1990, 42 (17): : 11051 - 11055
  • [7] MODIFICATION OF OPTICAL-PROPERTIES OF GAAS-GA1-XALXAS SUPER-LATTICES DUE TO BAND MIXING
    CHANG, YC
    SCHULMAN, JN
    [J]. APPLIED PHYSICS LETTERS, 1983, 43 (06) : 536 - 538
  • [8] EFFECTS OF CONFIGURATION INTERACTION ON INTENSITIES AND PHASE SHIFTS
    FANO, U
    [J]. PHYSICAL REVIEW, 1961, 124 (06): : 1866 - &
  • [9] MOTION OF ELECTRONS AND HOLES IN PERTURBED PERIODIC FIELDS
    LUTTINGER, JM
    KOHN, W
    [J]. PHYSICAL REVIEW, 1955, 97 (04): : 869 - 883
  • [10] OPTICAL DEPHASING OF HOMOGENEOUSLY BROADENED TWO-DIMENSIONAL EXCITON-TRANSITIONS IN GAAS QUANTUM-WELLS
    SCHULTHEIS, L
    HONOLD, A
    KUHL, J
    KOHLER, K
    TU, CW
    [J]. PHYSICAL REVIEW B, 1986, 34 (12): : 9027 - 9030