Terahertz emission from a laser pulse with tilted front: Phase-matching versus Cherenkov effect

被引：39

作者：

Bakunov, M. I. ^{[1
,2
]}

Bodrov, S. B. ^{[1
,2
]}

Tsarev, M. V. ^{[1
,2
]}

机构：

[1] Univ Nizhny Novgorod, Nizhnii Novgorod 603950, Russia

[2] Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod 603950, Russia

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 104卷 / 07期

关键词：

D O I：

10.1063/1.2989999

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A theory that describes the terahertz generation via optical rectification of a femtosecond laser pulse with tilted front in an electro-optic crystal is developed. The theory accounts for the transverse size of the laser pulse and allows us to explore the dependence of the terahertz yield on laser focusing. Two typical experimental situations-LiNbO(3) excited with Ti:sapphire laser at room and cryogenic temperatures-are considered. It is shown that depending on temperature the dominant generation mechanism can be either phase-matching or Cherenkov effect. The parameters of the laser pulse (transverse size, tilt angle, and pulse duration) and crystal size maximizing the terahertz yield for LiNbO(3) are calculated. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.2989999]

引用

页数：13

共 29 条

[1] SUBPICOSECOND ELECTROOPTIC SHOCK-WAVES [J].

AUSTON, DH .

APPLIED PHYSICS LETTERS, 1983, 43 (08) :713-715

[2] CHERENKOV RADIATION FROM FEMTOSECOND OPTICAL PULSES IN ELECTRO-OPTIC MEDIA [J].

AUSTON, DH ;

CHEUNG, KP ;

VALDMANIS, JA ;

KLEINMAN, DA .

PHYSICAL REVIEW LETTERS, 1984, 53 (16) :1555-1558

[3] Theory of terahertz generation in a slab of electro-optic material using an ultrashort laser pulse focused to a line [J].

Bakunov, M. I. ;

Bodrov, S. B. ;

Maslov, A. V. ;

Hangyo, M. .

PHYSICAL REVIEW B, 2007, 76 (08)

[4] Fresnel formulas for the forced electromagnetic pulses and their application for optical-to-terahertz conversion in nonlinear crystals [J].

Bakunov, M. I. ;

Maslov, A. V. ;

Bodrov, S. B. .

PHYSICAL REVIEW LETTERS, 2007, 99 (20)

[5] Cherenkov radiation of terahertz surface plasmon polaritons from a superluminal optical spot [J].

Bakunov, MI ;

Maslov, AV ;

Bodrov, SB .

PHYSICAL REVIEW B, 2005, 72 (19)

[6] Phase-matched generation of a terahertz surface wave by a subluminous optical strip [J].

Bakunov, MI ;

Maslov, AV ;

Bodrov, SB .

JOURNAL OF APPLIED PHYSICS, 2005, 98 (03)

[7] Toward generation of μJ range sub-ps THz pulses by optical rectification [J].

Bartal, B. ;

Kozma, I. Z. ;

Stepanov, A. G. ;

Almasi, G. ;

Kuhl, J. ;

Riedle, E. ;

Hebling, J. .

APPLIED PHYSICS B-LASERS AND OPTICS, 2007, 86 (03) :419-423

[8] Efficient generation of high-power quasi-single-cycle terahertz pulses from a single infrared beam in a second-order nonlinear medium [J].

Ding, YJ .

OPTICS LETTERS, 2004, 29 (22) :2650-2652

[9] Modelling laser-based table-top THz sources: Optical rectification, propagation and electro-optic sampling [J].

Faure, J ;

Van Tilborg, J ;

Kaindl, RA ;

Leemans, WP .

OPTICAL AND QUANTUM ELECTRONICS, 2004, 36 (08) :681-697

[10] Tunable THz pulse generation by optical rectification of ultrashort laser pulses with tilted pulse fronts [J].

Hebling, J ;

Stepanov, AG ;

Almaási, G ;

Bartal, B ;

Kuhl, J .

APPLIED PHYSICS B-LASERS AND OPTICS, 2004, 78 (05) :593-599

← 1 2 3 →