Broad spectral response in composition-graded CdSSe single nanowires via waveguiding excitation

被引：12

作者：

Gu, Fuxing ^{[1
]}

Yu, Huakang ^{[1
]}

Fang, Wei ^{[1
]}

Tong, Limin ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Opt Engn, State Key Lab Modern Opt Instrumentat, Hangzhou 310027, Zhejiang, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 18期

基金：

中国国家自然科学基金;

关键词：

PHOTOCONDUCTIVITY; PHOTOLUMINESCENCE; PHOTODETECTORS; NM;

D O I：

10.1063/1.3657523

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report broad spectral response in composition-graded CdSSe single nanowires (NWs) via waveguiding excitation. The excitation light is coupled to CdSSe single nanowires via silica fiber tapers. The guided photons in the nanowire with energies ranging from 1.74 to 2.44 eV can be efficiently captured at different sites along the NW length. Compared to single-composition nanowires, the composition-graded CdSSe nanowires exhibit much broader spectral response range, while retaining the detection limit down to sub-pW level. Utilizing the photoconductive quenching effect, the spectral range can be further extended beyond 1.5 mu m with detection limit down to sub-nW level at room temperature. (C) 2011 American Institute of Physics. [doi:10.1063/1.3657523]

引用

收藏

页数：3

相关论文

共 23 条

[1] INFRARED QUENCHING AND A UNIFIED DESCRIPTION OF PHOTOCONDUCTIVITY PHENOMENA IN CADMIUM SULFIDE AND SELENIDE [J].

BUBE, RH .

PHYSICAL REVIEW, 1955, 99 (04) :1105-1116

[2] Fast, sensitive and spectrally tuneable colloidal quantum-dot photodetectors [J].

Clifford, Jason P. ;

Konstantatos, Gerasimos ;

Johnston, Keith W. ;

Hoogland, Sjoerd ;

Levina, Larissa ;

Sargent, Edward H. .

NATURE NANOTECHNOLOGY, 2009, 4 (01) :40-44

[3] Photoluminescence and polarized photodetection of single ZnO nanowires [J].

Fan, ZY ;

Chang, PC ;

Lu, JG ;

Walter, EC ;

Penner, RM ;

Lin, CH ;

Lee, HP .

APPLIED PHYSICS LETTERS, 2004, 85 (25) :6128-6130

[4] CMOS-compatible all-Si high-speed waveguide photodiodes with high responsivity in near-infrared communication band [J].

Geis, M. W. ;

Spector, S. J. ;

Grein, M. E. ;

Schulein, R. T. ;

Yoon, J. U. ;

Lennon, D. M. ;

Deneault, S. ;

Gan, F. ;

Kaertner, F. X. ;

Lyszczarz, T. M. .

IEEE PHOTONICS TECHNOLOGY LETTERS, 2007, 19 (2-4) :152-154

[5] High-Detectivity Polymer Photodetectors with Spectral Response from 300 nm to 1450 nm [J].

Gong, Xiong ;

Tong, Minghong ;

Xia, Yangjun ;

Cai, Wanzhu ;

Moon, Ji Sun ;

Cao, Yong ;

Yu, Gang ;

Shieh, Chan-Long ;

Nilsson, Boo ;

Heeger, Alan J. .

SCIENCE, 2009, 325 (5948) :1665-1667

[6] Polymer single-nanowire optical sensors [J].

Gu, Fuxing ;

Zhang, Lei ;

Yin, Xuefeng ;

Tong, Limin .

NANO LETTERS, 2008, 8 (09) :2757-2761

[7] Optical quenching of photoconductivity in CdSe single nanowires via waveguiding excitation [J].

Gu, Fuxing ;

Wang, Pan ;

Yu, Huakang ;

Guo, Bing ;

Tong, Limin .

OPTICS EXPRESS, 2011, 19 (11) :10880-10885

[8] Spatial Bandgap Engineering along Single Alloy Nanowires [J].

Gu, Fuxing ;

Yang, Zongyin ;

Yu, Huakang ;

Xu, Jinyou ;

Wang, Pan ;

Tong, Limin ;

Pan, Anlian .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2011, 133 (07) :2037-2039

[9] Light-Emitting Polymer Single Nanofibers via Waveguiding Excitation [J].

Gu, Fuxing ;

Yu, Huakang ;

Wang, Pan ;

Yang, Zongyin ;

Tong, Limin .

ACS NANO, 2010, 4 (09) :5332-5338

[10] Optical quenching of photoconductivity in GaN photoconductors [J].

Huang, ZC ;

Mott, DB ;

Shu, PK ;

Zhang, R ;

Chen, JC ;

Wickenden, DK .

JOURNAL OF APPLIED PHYSICS, 1997, 82 (05) :2707-2709