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Aluminum–Titanium Bilayer for Near-Infrared Transition Edge Sensors
Transition-edge sensors (TESs) are single photon detectors attractive for applications in quantum optics and quantum information experiments owing to their photon number resolving capability. Nowadays, high-energy resolution TESs for telecommunication are based on either W or Au/Ti films, demonstrat...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4970007/ https://www.ncbi.nlm.nih.gov/pubmed/27347950 http://dx.doi.org/10.3390/s16070953 |
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author | Lolli, Lapo Taralli, Emanuele Portesi, Chiara Rajteri, Mauro Monticone, Eugenio |
author_facet | Lolli, Lapo Taralli, Emanuele Portesi, Chiara Rajteri, Mauro Monticone, Eugenio |
author_sort | Lolli, Lapo |
collection | PubMed |
description | Transition-edge sensors (TESs) are single photon detectors attractive for applications in quantum optics and quantum information experiments owing to their photon number resolving capability. Nowadays, high-energy resolution TESs for telecommunication are based on either W or Au/Ti films, demonstrating slow recovery time constants. We report our progress on the development of an Al/Ti TES. Since bulk aluminum has a critical temperature (T(c)) of ca. 1.2 K and a sufficiently low specific heat (less than 10(−4) J/cm(3)K(2)), it can be employed to produce the sensitive material for optical TESs. Furthermore, exploiting its high T(c), Al-based TESs can be trimmed in a wider temperature range with respect to Ti or W. A first Al/Ti TES with a T(c) ≈ 142 mK, investigated from a thermal and optical point of view, has shown a response time constant of about 2 μs and single photon discrimination with 0.34 eV energy resolution at telecom wavelength, demonstrating that Al/Ti films are suitable to produce TESs for visible and NIR photon counting. |
format | Online Article Text |
id | pubmed-4970007 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-49700072016-08-04 Aluminum–Titanium Bilayer for Near-Infrared Transition Edge Sensors Lolli, Lapo Taralli, Emanuele Portesi, Chiara Rajteri, Mauro Monticone, Eugenio Sensors (Basel) Article Transition-edge sensors (TESs) are single photon detectors attractive for applications in quantum optics and quantum information experiments owing to their photon number resolving capability. Nowadays, high-energy resolution TESs for telecommunication are based on either W or Au/Ti films, demonstrating slow recovery time constants. We report our progress on the development of an Al/Ti TES. Since bulk aluminum has a critical temperature (T(c)) of ca. 1.2 K and a sufficiently low specific heat (less than 10(−4) J/cm(3)K(2)), it can be employed to produce the sensitive material for optical TESs. Furthermore, exploiting its high T(c), Al-based TESs can be trimmed in a wider temperature range with respect to Ti or W. A first Al/Ti TES with a T(c) ≈ 142 mK, investigated from a thermal and optical point of view, has shown a response time constant of about 2 μs and single photon discrimination with 0.34 eV energy resolution at telecom wavelength, demonstrating that Al/Ti films are suitable to produce TESs for visible and NIR photon counting. MDPI 2016-06-23 /pmc/articles/PMC4970007/ /pubmed/27347950 http://dx.doi.org/10.3390/s16070953 Text en © 2016 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Lolli, Lapo Taralli, Emanuele Portesi, Chiara Rajteri, Mauro Monticone, Eugenio Aluminum–Titanium Bilayer for Near-Infrared Transition Edge Sensors |
title | Aluminum–Titanium Bilayer for Near-Infrared Transition Edge Sensors |
title_full | Aluminum–Titanium Bilayer for Near-Infrared Transition Edge Sensors |
title_fullStr | Aluminum–Titanium Bilayer for Near-Infrared Transition Edge Sensors |
title_full_unstemmed | Aluminum–Titanium Bilayer for Near-Infrared Transition Edge Sensors |
title_short | Aluminum–Titanium Bilayer for Near-Infrared Transition Edge Sensors |
title_sort | aluminum–titanium bilayer for near-infrared transition edge sensors |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4970007/ https://www.ncbi.nlm.nih.gov/pubmed/27347950 http://dx.doi.org/10.3390/s16070953 |
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