Quantum dots fabricated by twofold cleaved edge overgrowth

G. Schedelbeck; W. Wegscheider; M. Rother; S. Glutsch; M. Bichler; G. Abstreiter

doi:10.1016/S1386-9477(98)00002-2

Quantum dots fabricated by twofold cleaved edge overgrowth

G. Schedelbeck, W. Wegscheider, M. Rother, S. Glutsch, M. Bichler, G. Abstreiter

TUM Emeriti of Excellence

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

6 Scopus citations

Abstract

Cleaved edge overgrowth (CEO) has proven to be a powerful technique for the fabrication of atomic scale T-shaped quantum wires (QWRs) which form at the intersection of two quantum wells (QWs). Here we report on the first experimental demonstration of quantum dots (QDs) which result when three QWs intersect each other at right angles. Optical emission from zero-dimensional (0D) states in these QDs which were fabricated by a twofold CEO technique is clearly identified by means of micro-photoluminescence (μPL) and μPL excitation (μPLE) spectroscopy. In contrast to the inhomogeneously broadened QW and QWR signals originating from the complex sample structure, the QD response, which is characterised by sharp lines (FWHM <70 μeV), is strongly spatially localised at a position where the QWs meet.

Original language	English
Pages (from-to)	1-7
Number of pages	7
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	2
Issue number	1-4
DOIs	https://doi.org/10.1016/S1386-9477(98)00002-2
State	Published - 15 Jul 1998

Keywords

Cleaved edge overgrowth (CEO)
Coupling
Quantum dots

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10.1016/S1386-9477(98)00002-2

Cite this

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title = "Quantum dots fabricated by twofold cleaved edge overgrowth",

abstract = "Cleaved edge overgrowth (CEO) has proven to be a powerful technique for the fabrication of atomic scale T-shaped quantum wires (QWRs) which form at the intersection of two quantum wells (QWs). Here we report on the first experimental demonstration of quantum dots (QDs) which result when three QWs intersect each other at right angles. Optical emission from zero-dimensional (0D) states in these QDs which were fabricated by a twofold CEO technique is clearly identified by means of micro-photoluminescence (μPL) and μPL excitation (μPLE) spectroscopy. In contrast to the inhomogeneously broadened QW and QWR signals originating from the complex sample structure, the QD response, which is characterised by sharp lines (FWHM <70 μeV), is strongly spatially localised at a position where the QWs meet.",

keywords = "Cleaved edge overgrowth (CEO), Coupling, Quantum dots",

author = "G. Schedelbeck and W. Wegscheider and M. Rother and S. Glutsch and M. Bichler and G. Abstreiter",

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T1 - Quantum dots fabricated by twofold cleaved edge overgrowth

AU - Schedelbeck, G.

AU - Wegscheider, W.

AU - Rother, M.

AU - Glutsch, S.

AU - Bichler, M.

AU - Abstreiter, G.

PY - 1998/7/15

Y1 - 1998/7/15

N2 - Cleaved edge overgrowth (CEO) has proven to be a powerful technique for the fabrication of atomic scale T-shaped quantum wires (QWRs) which form at the intersection of two quantum wells (QWs). Here we report on the first experimental demonstration of quantum dots (QDs) which result when three QWs intersect each other at right angles. Optical emission from zero-dimensional (0D) states in these QDs which were fabricated by a twofold CEO technique is clearly identified by means of micro-photoluminescence (μPL) and μPL excitation (μPLE) spectroscopy. In contrast to the inhomogeneously broadened QW and QWR signals originating from the complex sample structure, the QD response, which is characterised by sharp lines (FWHM <70 μeV), is strongly spatially localised at a position where the QWs meet.

AB - Cleaved edge overgrowth (CEO) has proven to be a powerful technique for the fabrication of atomic scale T-shaped quantum wires (QWRs) which form at the intersection of two quantum wells (QWs). Here we report on the first experimental demonstration of quantum dots (QDs) which result when three QWs intersect each other at right angles. Optical emission from zero-dimensional (0D) states in these QDs which were fabricated by a twofold CEO technique is clearly identified by means of micro-photoluminescence (μPL) and μPL excitation (μPLE) spectroscopy. In contrast to the inhomogeneously broadened QW and QWR signals originating from the complex sample structure, the QD response, which is characterised by sharp lines (FWHM <70 μeV), is strongly spatially localised at a position where the QWs meet.

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Quantum dots fabricated by twofold cleaved edge overgrowth

Abstract

Keywords

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