Nonlinear ultrafast modulation of the optical absorption of intense few-cycle terahertz pulses in n-doped semiconductors

被引：113

作者：

Razzari, L. ^{[1
,2
]}

Su, F. H. ^{[3
]}

Sharma, G. ^{[1
]}

Blanchard, F. ^{[1
]}

Ayesheshim, A. ^{[3
]}

Bandulet, H. -C. ^{[1
]}

Morandotti, R. ^{[1
]}

Kieffer, J. -C. ^{[1
]}

Ozaki, T. ^{[1
]}

Reid, M. ^{[4
]}

Hegmann, F. A. ^{[3
]}

机构：

[1] Univ Quebec, INRS EMT, Adv Laser Light Source, Varennes, PQ J3X 1S2, Canada

[2] Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy

[3] Univ Alberta, Dept Phys, Edmonton, AB T6G 2G7, Canada

[4] Univ British Columbia, Dept Phys, Prince George, BC V2N 4Z9, Canada

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 19期

关键词：

nonlinear optics; optical modulation; optical pulse generation; optical saturable absorption; semiconductors; terahertz waves; INTERVALLEY SCATTERING; ELECTRON-TRANSPORT; GENERATION; DYNAMICS; GAAS;

D O I：

10.1103/PhysRevB.79.193204

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We use an open-aperture Z scan technique to show how intense few-cycle terahertz pulses can experience a nonlinear bleaching of absorption in an n-doped semiconductor due to terahertz-electric-field-driven intervalley scattering of electrons in the conduction band. Coherent detection of the transmitted terahertz pulse wave form also allows the nonlinear conductivity dynamics to be followed with subpicosecond time resolution. Both the Z scan and time-domain results are found to be in agreement with our theoretical analysis.

引用

页数：4

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