Highly efficient THG in TiO2 nanolayers for third-order pulse characterization

被引：34

作者：

Das, Susanta Kumar ^{[1
]}

Schwanke, Christoph ^{[1
]}

Pfuch, Andreas ^{[2
,3
]}

Seeber, Wolfgang ^{[2
]}

Bock, Martin ^{[1
]}

Steinmeyer, Guenter ^{[1
]}

Elsaesser, Thomas ^{[1
]}

Grunwald, Ruediger ^{[1
]}

机构：

[1] Max Born Inst Nonlinear Opt & Short Pulse Spect, D-12489 Berlin, Germany

[2] Univ Jena, Otto Schott Inst, D-07743 Jena, Germany

[3] INNOVENT eV Technol Entwicklung Jena, D-07745 Jena, Germany

来源：

OPTICS EXPRESS | 2011年 / 19卷 / 18期

关键词：

NONLINEAR-OPTICAL PROPERTIES; 3RD-HARMONIC GENERATION; THIN-FILMS; FEMTOSECOND PULSES; REFRACTIVE-INDEX; LASER-PULSES; AUTOCORRELATION; ABSORPTION; INTERFACES; ZNO;

D O I：

10.1364/OE.19.016985

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Third harmonic generation (THG) of femtosecond laser pulses in sputtered nanocrystalline TiO2 thin films is investigated. Using layers of graded thickness, the dependence of THG on the film parameters is studied. The maximum THG signal is observed at a thickness of 180 nm. The corresponding conversion efficiency is 26 times larger compared to THG at the air-glass interface. For a demonstration of the capabilities of such a highly nonlinear material for pulse characterization, third-order autocorrelation and interferometric frequency-resolved optical gating (IFROG) traces are recorded with unamplified nanojoule pulses directly from a broadband femtosecond laser oscillator. (C) 2011 Optical Society of America

引用

页码：16985 / 16995

页数：11

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