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PbSe quantum dots grown in a high-index low-melting-temperature glass for infrared laser applications

PbSe quantum dots grown in a high-index low-melting-temperature glass for infrared laser applications
PbSe quantum dots grown in a high-index low-melting-temperature glass for infrared laser applications
PbSe quantum dots (QDs) were grown in high-refractive-index low-melting-temperature lead-phosphate glass. QDs with various sizes ranging from 2 nm to 5.3 nm were grown by controlling the growth parameters, heat-treatment temperature and time. The corresponding room-temperature exciton absorption was tuned within the infrared region from 0.93 µm to 2.75 µm. Photoluminescence was measured for samples with absorption peaks above 0.95eV. Real time quantum dot growth was demonstrated by monitoring the evolution of exciton absorption with temperature and time duration. As a demonstration of the use of QDs in laser applications, the saturation fluence (Fsat) of one of the QDs was evaluated and found to be ~2.1 µJ/cm2 at 1.2 µm.
quantum dots, exciton absorption, saturable absorbers, high-index glass, lead-phosphate glass
Pradeesh, Kannan
d264c1f5-cbaf-42ac-a939-10fce00fa5cb
Choudhary, Amol
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Mills, B.
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Leonard, V.
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Hewak, D.W.
87c80070-c101-4f7a-914f-4cc3131e3db0
Feng, X.
9953a7b7-94ca-4a06-96c9-7c09a2c92198
Shepherd, D.P.
9fdd51c4-39d6-41b3-9021-4c033c2f4ead
Pradeesh, Kannan
d264c1f5-cbaf-42ac-a939-10fce00fa5cb
Choudhary, Amol
a5540b54-f153-43e4-a59a-e3ed9360904b
Mills, B.
05f1886e-96ef-420f-b856-4115f4ab36d0
Leonard, V.
19532751-4c67-485c-8af4-7c3d0e4fc547
Hewak, D.W.
87c80070-c101-4f7a-914f-4cc3131e3db0
Feng, X.
9953a7b7-94ca-4a06-96c9-7c09a2c92198
Shepherd, D.P.
9fdd51c4-39d6-41b3-9021-4c033c2f4ead

Pradeesh, Kannan, Choudhary, Amol, Mills, B., Leonard, V., Hewak, D.W., Feng, X. and Shepherd, D.P. (2013) PbSe quantum dots grown in a high-index low-melting-temperature glass for infrared laser applications. Photonics West, San Francisco, United States. 02 - 07 Feb 2013. 8 pp . (doi:10.1117/12.2001079).

Record type: Conference or Workshop Item (Paper)

Abstract

PbSe quantum dots (QDs) were grown in high-refractive-index low-melting-temperature lead-phosphate glass. QDs with various sizes ranging from 2 nm to 5.3 nm were grown by controlling the growth parameters, heat-treatment temperature and time. The corresponding room-temperature exciton absorption was tuned within the infrared region from 0.93 µm to 2.75 µm. Photoluminescence was measured for samples with absorption peaks above 0.95eV. Real time quantum dot growth was demonstrated by monitoring the evolution of exciton absorption with temperature and time duration. As a demonstration of the use of QDs in laser applications, the saturation fluence (Fsat) of one of the QDs was evaluated and found to be ~2.1 µJ/cm2 at 1.2 µm.

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Published date: February 2013
Additional Information: 8621-3
Venue - Dates: Photonics West, San Francisco, United States, 2013-02-02 - 2013-02-07
Keywords: quantum dots, exciton absorption, saturable absorbers, high-index glass, lead-phosphate glass
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 367839
URI: http://eprints.soton.ac.uk/id/eprint/367839
PURE UUID: d134c9f1-df0d-484d-926d-0f1c3f392586
ORCID for B. Mills: ORCID iD orcid.org/0000-0002-1784-1012
ORCID for D.W. Hewak: ORCID iD orcid.org/0000-0002-2093-5773
ORCID for D.P. Shepherd: ORCID iD orcid.org/0000-0002-4561-8184

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Date deposited: 17 Sep 2014 11:36
Last modified: 18 Feb 2021 17:08

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