Resonantly probing micropillar cavity modes by photocurrent spectroscopy

C. Kistner; S. Reitzenstein; C. Schneider; Sven Höfling; A. Forchel

doi:10.1063/1.3147162

Resonantly probing micropillar cavity modes by photocurrent spectroscopy

C. Kistner^*, S. Reitzenstein, C. Schneider, Sven Höfling, A. Forchel

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

We demonstrate electrical readout of high quality quantum dot micropillars by means of photocurrent (PC) spectroscopy under resonant excitation. Applying this technique enables a high spectral resolution mapping of the optical mode spectrum of the micropillar revealing quality factors of up to 11 000 for a 3 mu m diameter device. PC spectroscopy also shows that the contacted micropillars can act as light sensors with highly wavelength selective and photon sensitive detection capabilities down to 20 nW incident power. Moreover, bias voltage dependent PC studies provide an effective tool to study the competition between carrier tunneling out of the quantum dots and the radiative recombination.

Original language	English
Article number	221103
Number of pages	3
Journal	Applied Physics Letters
Volume	94
Issue number	22
DOIs	https://doi.org/10.1063/1.3147162
Publication status	Published - 1 Jun 2009

Keywords

photoconductivity
photoelectron spectra
Q-factor
quantum dots
tunnelling
QUANTUM-DOT

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10.1063/1.3147162

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title = "Resonantly probing micropillar cavity modes by photocurrent spectroscopy",

abstract = "We demonstrate electrical readout of high quality quantum dot micropillars by means of photocurrent (PC) spectroscopy under resonant excitation. Applying this technique enables a high spectral resolution mapping of the optical mode spectrum of the micropillar revealing quality factors of up to 11 000 for a 3 mu m diameter device. PC spectroscopy also shows that the contacted micropillars can act as light sensors with highly wavelength selective and photon sensitive detection capabilities down to 20 nW incident power. Moreover, bias voltage dependent PC studies provide an effective tool to study the competition between carrier tunneling out of the quantum dots and the radiative recombination.",

keywords = "photoconductivity, photoelectron spectra, Q-factor, quantum dots, tunnelling, QUANTUM-DOT",

author = "C. Kistner and S. Reitzenstein and C. Schneider and Sven H{\"o}fling and A. Forchel",

year = "2009",

month = jun,

day = "1",

doi = "10.1063/1.3147162",

language = "English",

volume = "94",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

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TY - JOUR

T1 - Resonantly probing micropillar cavity modes by photocurrent spectroscopy

AU - Kistner, C.

AU - Reitzenstein, S.

AU - Schneider, C.

AU - Höfling, Sven

AU - Forchel, A.

PY - 2009/6/1

Y1 - 2009/6/1

N2 - We demonstrate electrical readout of high quality quantum dot micropillars by means of photocurrent (PC) spectroscopy under resonant excitation. Applying this technique enables a high spectral resolution mapping of the optical mode spectrum of the micropillar revealing quality factors of up to 11 000 for a 3 mu m diameter device. PC spectroscopy also shows that the contacted micropillars can act as light sensors with highly wavelength selective and photon sensitive detection capabilities down to 20 nW incident power. Moreover, bias voltage dependent PC studies provide an effective tool to study the competition between carrier tunneling out of the quantum dots and the radiative recombination.

AB - We demonstrate electrical readout of high quality quantum dot micropillars by means of photocurrent (PC) spectroscopy under resonant excitation. Applying this technique enables a high spectral resolution mapping of the optical mode spectrum of the micropillar revealing quality factors of up to 11 000 for a 3 mu m diameter device. PC spectroscopy also shows that the contacted micropillars can act as light sensors with highly wavelength selective and photon sensitive detection capabilities down to 20 nW incident power. Moreover, bias voltage dependent PC studies provide an effective tool to study the competition between carrier tunneling out of the quantum dots and the radiative recombination.

KW - photoconductivity

KW - photoelectron spectra

KW - Q-factor

KW - quantum dots

KW - tunnelling

KW - QUANTUM-DOT

U2 - 10.1063/1.3147162

DO - 10.1063/1.3147162

M3 - Article

SN - 0003-6951

VL - 94

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 22

M1 - 221103

ER -

Resonantly probing micropillar cavity modes by photocurrent spectroscopy

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Keywords

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