Ultrafast broadband spectroscopy of crystalline bismuth

被引：3

作者：

Melnikov, A. A. ^{[1
]}

Misochko, O. V. ^{[2
]}

Chekalin, S. V. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Spect, Moscow 142190, Russia

[2] Russian Acad Sci, Inst Solid State Phys, Chernogolovka 142432, Moscow Region, Russia

来源：

QUANTUM ELECTRONICS | 2013年 / 43卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

femtosecond spectroscopy; electron - phonon coupling; bismuth; coherent phonons; ULTRASHORT LASER-PULSES; COHERENT PHONONS; DISPLACIVE; EXCITATION; ELECTRONS; MECHANISM; SB; BI;

D O I：

10.1070/QE2013v043n04ABEH015108

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：

Femtosecond spectroscopy in the wavelength range 0.4-2.3 mu m has been used to probe ultrafast electronic and lattice processes in bismuth. The photoresponse of a bismuth crystal is shown to comprise components with relaxation times of 1 ps, 7 ps, and similar to 1 ns. The electron-hole and electron -phonon interaction strengths in bismuth are found to depend significantly on the wave vector in the Gamma-T direction of the Brillouin zone. Comparison of the spectral dependences of the amplitudes of coherent E-g and A(1g) phonons and the corresponding dependences of the Raman scattering cross sections indicates that these phonon modes differ in generation mechanism. The generation of coherent A(1g) phonons is mainly due to displacement of the equilibrium position of atoms in the crystal lattice in a nonequilibrium state. This process differs fundamentally from resonance Raman scattering responsible for the coherent excitation of low-symmetry phonon modes.

引用

页码：313 / 319

页数：7

共 30 条

[1] THEORY OF THERMAL RELAXATION OF ELECTRONS IN METALS [J].

ALLEN, PB .

PHYSICAL REVIEW LETTERS, 1987, 59 (13) :1460-1463

[2] Small atomic displacements recorded in bismuth by the optical reflectivity of femtosecond laser-pulse excitations [J].

Boschetto, D. ;

Gamaly, E. G. ;

Rode, A. V. ;

Luther-Davies, B. ;

Glijer, D. ;

Garl, T. ;

Albert, O. ;

Rousse, A. ;

Etchepare, J. .

PHYSICAL REVIEW LETTERS, 2008, 100 (02)

[3] OPTICAL PROPERTIES + BAND STRUCTURE OF GROUP 4-6 + GROUP 5 MATERIALS [J].

CARDONA, M ;

GREENAWAY, DL .

PHYSICAL REVIEW, 1964, 133 (6A) :1685-+

[4] PROPERTIES OF ELECTRONS IN BISMUTH [J].

EDELMAN, VS .

USPEKHI FIZICHESKIKH NAUK, 1977, 123 (02) :257-287

[5] Anisotropic response of nanosized bismuth films upon femtosecond laser excitation monitored by ultrafast electron diffraction [J].

Esmail, Ahmed R. ;

Elsayed-Ali, Hani E. .

APPLIED PHYSICS LETTERS, 2011, 99 (16)

[6]

Fal'kovskii L.A., 1968, USP FIZ NAUK, V99, P3

[7] Ultrafast bond softening in bismuth:: Mapping a solid's interatomic potential with X-rays [J].

Fritz, D. M. ;

Reis, D. A. ;

Adams, B. ;

Akre, R. A. ;

Arthur, J. ;

Blome, C. ;

Bucksbaum, P. H. ;

Cavalieri, A. L. ;

Engemann, S. ;

Fahy, S. ;

Falcone, R. W. ;

Fuoss, P. H. ;

Gaffney, K. J. ;

George, M. J. ;

Hajdu, J. ;

Hertlein, M. P. ;

Hillyard, P. B. ;

Hoegen, M. Horn-von ;

Kammler, M. ;

Kaspar, J. ;

Kienberger, R. ;

Krejcik, P. ;

Lee, S. H. ;

Lindenberg, A. M. ;

McFarland, B. ;

Meyer, D. ;

Montagne, T. ;

Murray, E. D. ;

Nelson, A. J. ;

Nicoul, M. ;

Pahl, R. ;

Rudati, J. ;

Schlarb, H. ;

Siddons, D. P. ;

Sokolowski-Tinten, K. ;

Tschentscher, Th. ;

von der Linde, D. ;

Hastings, J. B. .

SCIENCE, 2007, 315 (5812) :633-636

[8] Coherent THz phonons driven by light pulses and the Sb problem: What is the mechanism? [J].

Garrett, GA ;

Albrecht, TF ;

Whitaker, JF ;

Merlin, R .

PHYSICAL REVIEW LETTERS, 1996, 77 (17) :3661-3664

[9] Entropy Driven Atomic Motion in Laser-Excited Bismuth [J].

Giret, Y. ;

Gelle, A. ;

Arnaud, B. .

PHYSICAL REVIEW LETTERS, 2011, 106 (15)

[10] BAND STRUCTURE OF BISMUTH - PSEUDOPOTENTIAL APPROACH [J].

GOLIN, S .

PHYSICAL REVIEW, 1968, 166 (03) :643-&

← 1 2 3 →