GENERATION OF COHERENT PHONONS IN CONDENSED MEDIA

被引:182
作者
KUTT, WA
ALBRECHT, W
KURZ, H
机构
[1] Institute of Semiconductor Electronic, RWTH Aachen
关键词
D O I
10.1109/3.159550
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this paper the generation of coherent phonons by absorption of femtosecond laser pulses through interband transitions in different materials is summarized. Starting with layered III-VI semiconductors, where optical excitation is performed with amplified pulses, the generation mechanism via strong interband transitions is investigated. In Ge stimulated resonant Raman scattering is found as the decisive driving force. In GaAs, however, the ultrafast screening of surface space charge fields, launches LO-phonons via electrostatic coupling. In the metallic state of high temperature superconductors, the generation of highly symmetric A(g) modes is assigned to displacive processes induced by a nonequilibrium electronic carrier distribution. In the superconducting state the amount of coherent displacement is strictly correlated to the number of optically broken superconducting pairs. In addition to the comparison of various generation processes, the dephasing of coherent phonons is addressed.
引用
收藏
页码:2434 / 2444
页数:11
相关论文
共 43 条
  • [1] ALTENDORF E, 1991, PHYSICA C, V175, P7457
  • [2] GIANT NONLINEAR LOSSES IN GASE CRYSTALS UNDER DOUBLE 2-PHOTON RESONANT CONDITIONS - VALENCE BAND-STRUCTURE FROM INDUCED FREE CARRIER ABSORPTION
    BALTRAMIEJUNAS, R
    GAVRYUSHIN, V
    RACIUKAITIS, G
    [J]. SOLID STATE COMMUNICATIONS, 1991, 80 (04) : 303 - 306
  • [3] Bloembergen N., 1965, NONLINEAR OPTICS
  • [4] PICOSECOND-LASER-INDUCED TRANSIENT DYNAMICS OF PHONONS IN GAP AND ZNSE
    BRON, WE
    KUHL, J
    RHEE, BK
    [J]. PHYSICAL REVIEW B, 1986, 34 (10): : 6961 - 6971
  • [5] FEMTOSECOND THERMOMODULATION STUDY OF HIGH-TC SUPERCONDUCTORS
    BRORSON, SD
    KAZEROONIAN, A
    FACE, DW
    CHENG, TK
    DOLL, GL
    DRESSELHAUS, MS
    DRESSELHAUS, G
    IPPEN, EP
    VENKATESAN, T
    WU, XD
    INAM, A
    [J]. SOLID STATE COMMUNICATIONS, 1990, 74 (12) : 1305 - 1308
  • [6] CARDONA M, 1982, TOPICS APPLIED PHYSI, V50
  • [7] IMPULSIVE EXCITATION OF COHERENT PHONONS OBSERVED IN REFLECTION IN BISMUTH AND ANTIMONY
    CHENG, TK
    BRORSON, SD
    KAZEROONIAN, AS
    MOODERA, JS
    DRESSELHAUS, G
    DRESSELHAUS, MS
    IPPEN, EP
    [J]. APPLIED PHYSICS LETTERS, 1990, 57 (10) : 1004 - 1006
  • [8] MECHANISM FOR DISPLACIVE EXCITATION OF COHERENT PHONONS IN SB, BI, TE, AND TI2O3
    CHENG, TK
    VIDAL, J
    ZEIGER, HJ
    DRESSELHAUS, G
    DRESSELHAUS, MS
    IPPEN, EP
    [J]. APPLIED PHYSICS LETTERS, 1991, 59 (16) : 1923 - 1925
  • [9] SUBPICOSECOND TIME-RESOLVED COHERENT-PHONON OSCILLATIONS IN GAAS
    CHO, GC
    KUTT, W
    KURZ, H
    [J]. PHYSICAL REVIEW LETTERS, 1990, 65 (06) : 764 - 766
  • [10] SUBPICOSECOND TIME-RESOLVED STUDIES OF COHERENT PHONON OSCILLATIONS IN THIN-FILM YBA2CU3O6+X (X-LESS-THAN-0.4)
    CHWALEK, JM
    UHER, C
    WHITAKER, JF
    MOUROU, GA
    AGOSTINELLI, JA
    [J]. APPLIED PHYSICS LETTERS, 1991, 58 (09) : 980 - 982