Ultrafast spatiotemporal relaxation dynamics of excited electrons in a metal nanostructure detected by femtosecond-SNOM

被引：9

作者：

Li, Zhi ^{[1
]}

Yue, Song

Chen, Jianjun

Gong, Qihuang

机构：

[1] Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China

来源：

OPTICS EXPRESS | 2010年 / 18卷 / 13期

基金：

中国国家自然科学基金;

关键词：

SURFACE-PLASMON; GOLD; MICROSCOPY; THERMALIZATION; FILMS; NSOM;

D O I：

10.1364/OE.18.014232

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Ultrahigh spatiotemporal resolved pump-probe signal near a gold nano-slit is detected by femtosecond-SNOM. By employing two-color pump-probe configuration and probing at the interband transition wavelength of the gold, signal contributed by surface plasmon polariton is avoided and spatiotemporal evolvement of excited electrons is successfully observed. From the contrast decaying of the periodical distribution of the pump-probe signal, ultrafast diffusion of excited electrons with a time scale of a few hundred femtoseconds is clearly identified. For comparison, such phenomenon cannot be observed by the one-color pump-probe configuration. (C) 2010 Optical Society of America

引用

页码：14232 / 14237

页数：6

共 16 条

[1] Surface plasmon subwavelength optics [J].

Barnes, WL ;

Dereux, A ;

Ebbesen, TW .

NATURE, 2003, 424 (6950) :824-830

[2] FEMTOSECOND ELECTRONIC HEAT-TRANSPORT DYNAMICS IN THIN GOLD-FILMS [J].

BRORSON, SD ;

FUJIMOTO, JG ;

IPPEN, EP .

PHYSICAL REVIEW LETTERS, 1987, 59 (17) :1962-1965

[3] Coherent nonlinear optical response of single quantum dots studied by ultrafast near-field spectroscopy [J].

Guenther, T ;

Lienau, C ;

Elsaesser, T ;

Glanemann, M ;

Axt, VM ;

Kuhn, T ;

Eshlaghi, S ;

Wieck, AD .

PHYSICAL REVIEW LETTERS, 2002, 89 (05) :057401/1-057401/4

[4] Imaging of surface plasmon and ultrafast dynamics in gold nanorods by near-field microscopy [J].

Imura, K ;

Nagahara, T ;

Okamoto, H .

JOURNAL OF PHYSICAL CHEMISTRY B, 2004, 108 (42) :16344-16347

[5] Ultrafast photoinduced changes of eigenfunctions of localized plasmon modes in gold nanorods [J].

Imura, Kohei ;

Okamoto, Hiromi .

PHYSICAL REVIEW B, 2008, 77 (04)

[6] Femtosecond microscopy of surface plasmon polariton wave packet evolution at the silver/vacuum interface [J].

Kubo, Atsushi ;

Pontius, Niko ;

Petek, Hrvoje .

NANO LETTERS, 2007, 7 (02) :470-475

[7]

LEWIS A, 1995, SCANNING, V17, P3, DOI 10.1002/sca.4950170101

[8] Ultrafast active plasmonics [J].

MacDonald, Kevin F. ;

Samson, Zsolt L. ;

Stockman, Mark I. ;

Zheludev, Nikolay I. .

NATURE PHOTONICS, 2009, 3 (01) :55-58

[9] Femtosecond pump-probe near-field optical microscopy [J].

Nechay, BA ;

Siegner, U ;

Achermann, M ;

Bielefeldt, H ;

Keller, U .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1999, 70 (06) :2758-2764

[10] Femtosecond near-field optical spectroscopy of implantation patterned semiconductors [J].

Nechay, BA ;

Siegner, U ;

Morier-Genoud, F ;

Schertel, A ;

Keller, U .

APPLIED PHYSICS LETTERS, 1999, 74 (01) :61-63

← 1 2 →