Improving time and space resolution in electro-optic sampling for near-field terahertz imaging

被引：46

作者：

Blanchard, Francois ^{[1
]}

Tanaka, Koichiro ^{[2
,3
]}

机构：

[1] Ecole Technol Super, Elect Engn Dept, Montreal, PQ, Canada

[2] Kyoto Univ, Inst Integrated Cell Mat Sci WPI ICeMS, Kyoto, Japan

[3] Kyoto Univ, Dept Phys, Kyoto, Japan

来源：

OPTICS LETTERS | 2016年 / 41卷 / 20期

基金：

加拿大自然科学与工程研究理事会;

关键词：

SPECTROSCOPY;

D O I：

10.1364/OL.41.004645

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this Letter, we present a significant improvement to time and space resolutions in electro-optic sampling (EO) for two-dimensional terahertz (THz) near-field imaging. Using a THz microscope, we readapt a recent EO sampling scheme based on optical probe spectrum filtering. Combined with an ultra-thin EO crystal, we achieve record broadband video-rate THz near-field imaging. Particularly, this new scheme improves the THz bandwidth, the imaging contrast, and the spatial resolution. To validate our method, we show THz near-field images ranging from 100 GHz to 4 THz with a spatial resolution up to lambda/600 at 100 GHz. This demonstration positively affects the detection of intense THz pulses derived from the tilted-pulse-front excitation of lithium niobate and will accelerate our understanding of the interaction processes between electromagnetic waves and the conducting electrons of metallic interfaces. (C) 2016 Optical Society of America

引用

页码：4645 / 4648

页数：4

共 22 条

[1] Review of Near-Field Terahertz Measurement Methods and Their Applications How to Achieve Sub-Wavelength Resolution at THz Frequencies [J].

Adam, Aurele Joseph Louis .

JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES, 2011, 32 (8-9) :976-1019

[2] Effect of extreme pump pulse reshaping on intense terahertz emission in lithium niobate at multimilliJoule pump energies [J].

Blanchard, F. ;

Ropagnol, X. ;

Hafez, H. ;

Razavipour, H. ;

Bolduc, M. ;

Morandotti, R. ;

Ozaki, T. ;

Cooke, D. G. .

OPTICS LETTERS, 2014, 39 (15) :4333-4336

[3] Terahertz spectroscopy of the reactive and radiative near-field zones of split ring resonator [J].

Blanchard, F. ;

Ooi, K. ;

Tanaka, T. ;

Doi, A. ;

Tanaka, K. .

OPTICS EXPRESS, 2012, 20 (17) :19395-19403

[4] Real-time terahertz near-field microscope [J].

Blanchard, F. ;

Doi, A. ;

Tanaka, T. ;

Hirori, H. ;

Tanaka, H. ;

Kadoya, Y. ;

Tanaka, K. .

OPTICS EXPRESS, 2011, 19 (09) :8277-8284

[5] Near-field terahertz imaging with a dynamic aperture [J].

Chen, Q ;

Jiang, ZP ;

Xu, GX ;

Zhang, XC .

OPTICS LETTERS, 2000, 25 (15) :1122-1124

[6]

Cocker TL, 2013, NAT PHOTONICS, V7, P620, DOI [10.1038/NPHOTON.2013.151, 10.1038/nphoton.2013.151]

[7] Improving Spatial Resolution of Real-Time Terahertz Near-Field Microscope [J].

Doi, Atsushi ;

Blanchard, Francois ;

Tanaka, Tomoko ;

Tanaka, Koichiro .

JOURNAL OF INFRARED MILLIMETER AND TERAHERTZ WAVES, 2011, 32 (8-9) :1043-1051

[8] Single-cycle terahertz pulses with amplitudes exceeding 1 MV/cm generated by optical rectification in LiNbO3 [J].

Hirori, H. ;

Doi, A. ;

Blanchard, F. ;

Tanaka, K. .

APPLIED PHYSICS LETTERS, 2011, 98 (09)

[9] IMAGING WITH TERAHERTZ WAVES [J].

HU, BB ;

NUSS, MC .

OPTICS LETTERS, 1995, 20 (16) :1716-&

[10] THz near-field imaging [J].

Hunsche, S ;

Koch, M ;

Brener, I ;

Nuss, MC .

OPTICS COMMUNICATIONS, 1998, 150 (1-6) :22-26

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