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Case study of an InAs quantum dot memory: Optical storing and deletion of charge
Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).ORCID iD: 0000-0001-5027-1456
Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Fotonik och mikrovågsteknik.ORCID iD: 0000-0002-4826-019X
Division of Solid State Physics, Lund University, Sweden.
Division of Solid State Physics, Lund University, Sweden.
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2001 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 79, no 1, p. 78-80Article in journal (Refereed) Published
Abstract [en]

We have studied self-assembled InAs quantum dots embedded in an InP matrix using photocapacitance and photocurrent spectroscopy. These dots are potentially promising for memories due to the large confinement energy for holes. In this work we have realized simple quantum dot memory by placing the dots in the space–charge region of a Schottky junction. Our measurements reveal that a maximum of about one hole can be stored per dot. We also find that illumination for an extended period deletes the stored charge. We show that these limitations do not reflect the intrinsic properties of the dots, but rather the sample structure in combination with deep traps present in the sample.

Place, publisher, year, edition, pages
New York: American Institute of Physics (AIP), 2001. Vol. 79, no 1, p. 78-80
Keywords [en]
Electronics, Photocurrent spectroscopy, Quantum dots, Indium compounds, III-V semiconductors, Semiconductor quantum dots, Photocapacitance, Photoconductivity, Self-assembly, Space charge, Schottky barriers, Deep levels, Optical storage
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:hh:diva-1840DOI: 10.1063/1.1382628ISI: 000169658800027Scopus ID: 2-s2.0-0035796722Local ID: 2082/2235OAI: oai:DiVA.org:hh-1840DiVA, id: diva2:239058
Available from: 2008-09-03 Created: 2008-09-03 Last updated: 2020-05-20Bibliographically approved

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Pettersson, HåkanBååth, Lars B.

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Halmstad Embedded and Intelligent Systems Research (EIS)Fotonik och mikrovågsteknik
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