Ultrafast Photodetection in the Quantum Wells of Single AlGaAs/GaAs-Based Nanowires

被引：40

作者：

Erhard, N. ^{[1
,3
]}

Zenger, S. ^{[1
]}

Morkoetter, S. ^{[1
]}

Rudolph, D. ^{[1
]}

Weiss, M. ^{[3
,4
]}

Krenner, H. J. ^{[3
,4
]}

Karl, H. ^{[4
]}

Abstreiter, G. ^{[1
,2
,3
]}

Finley, J. J. ^{[1
,3
]}

Koblmueller, G. ^{[1
]}

Holleitner, A. W. ^{[1
,3
]}

机构：

[1] Tech Univ Munich, Walter Schottky Inst & Phys Dept, D-85748 Garching, Germany

[2] Tech Univ Munich, Inst Adv Study, D-85748 Garching, Germany

[3] NIM, D-80799 Munich, Germany

[4] Univ Augsburg, Inst Phys, D-86135 Augsburg, Germany

来源：

NANO LETTERS | 2015年 / 15卷 / 10期

关键词：

GaAs/AlGaAs-core-shell nanowires; quantum well; ultrafast photodetector; ultrafast photoswitch; CORE-SHELL NANOWIRES; ROOM-TEMPERATURE; SEMICONDUCTOR NANOWIRES; PHOTON SOURCE; SOLAR-CELLS; TRANSPORT; EMISSION; CURRENTS; DOT; GENERATION;

D O I：

10.1021/acs.nanolett.5b02766

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We investigate the ultrafast optoelectronic properties of single Al0.3Ga0.7As/GaAs core-shell nanowires. The nanowires contain GaAs-based quantum wells. For a resonant excitation of the quantum wells, we find a picosecond photocurrent which is consistent with an ultrafast lateral expansion of the photogenerated charge carriers. This Dember-effect does not occur for an excitation of the GaAs-based core of the nanowires. Instead, the core exhibits an ultrafast displacement current and a photothermoelectric current at the metal Schottky contacts. Our results uncover the optoelectronic dynamics in semiconductor core-shell nanowires comprising quantum wells, and they demonstrate the possibility to use the low-dimensional quantum well states therein for ultrafast photoswitches and photodetectors.

引用

页码：6869 / 6874

页数：6

共 44 条

[1] IMPULSE-RESPONSE OF PHOTOCONDUCTORS IN TRANSMISSION-LINES [J].

AUSTON, DH .

IEEE JOURNAL OF QUANTUM ELECTRONICS, 1983, 19 (04) :639-648

[2]

Babinec TM, 2010, NAT NANOTECHNOL, V5, P195, DOI [10.1038/NNANO.2010.6, 10.1038/nnano.2010.6]

[3]

Bulgarini G, 2012, NAT PHOTONICS, V6, P455, DOI [10.1038/nphoton.2012.110, 10.1038/NPHOTON.2012.110]

[4] Subsurface Imaging of Coupled Carrier Transport in GaAs/AlGaAs Core-Shell Nanowires [J].

Chen, Guannan ;

McGuckin, Terrence ;

Hawley, Christopher J. ;

Gallo, Eric M. ;

Prete, Paola ;

Miccoli, Ilio ;

Lovergine, Nico ;

Spanier, Jonathan E. .

NANO LETTERS, 2015, 15 (01) :75-79

[5] The Einstein relation in quantum wells and quantum well wires: simplified theory and a suggestion for experimental determination [J].

Choudhury, S ;

Singh, LJ ;

Ghatak, KP .

NANOTECHNOLOGY, 2004, 15 (01) :180-188

[6] A highly efficient single-photon source based on a quantum dot in a photonic nanowire [J].

Claudon, Julien ;

Bleuse, Joel ;

Malik, Nitin Singh ;

Bazin, Maela ;

Jaffrennou, Perine ;

Gregersen, Niels ;

Sauvan, Christophe ;

Lalanne, Philippe ;

Gerard, Jean-Michel .

NATURE PHOTONICS, 2010, 4 (03) :174-177

[7]

Dember H, 1931, PHYS Z, V32, P554

[8] Transient response of photodetectors [J].

Dunn, GM ;

Walker, AB ;

Vickers, AJ ;

Wicks, VR .

JOURNAL OF APPLIED PHYSICS, 1996, 79 (09) :7329-7338

[9]

Erhard N., 2014, ARXIV14090300

[10] Ultrafast photocurrents and THz generation in single InAs-nanowires [J].

Erhard, Nadine ;

Seifert, Paul ;

Prechtel, Leonhard ;

Hertenberger, Simon ;

Karl, Helmut ;

Abstreiter, Gerhard ;

Koblmueller, Gregor ;

Holleitner, Alexander W. .

ANNALEN DER PHYSIK, 2013, 525 (1-2) :180-188

← 1 2 3 4 5 →