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High optical sensitivity to ambient conditions of uncapped InGaAs surface quantum dots
Citation
Milla Rodrigo, M. J. and Ulloa Herrero, José María and Fernández González, Álvaro de Guzmán (2012). High optical sensitivity to ambient conditions of uncapped InGaAs surface quantum dots. "Applied Physics Letters", v. 100 (n. 13); pp.. ISSN 0003-6951. https://doi.org/10.1063/1.3697992.
Description
| Title: | High optical sensitivity to ambient conditions of uncapped InGaAs surface quantum dots |
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| Author/s: |
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| Item Type: | Article |
| Título de Revista/Publicación: | Applied Physics Letters |
| Date: | March 2012 |
| ISSN: | 0003-6951 |
| Volume: | 100 |
| Subjects: | |
| Faculty: | Instituto de Sistemas Optoelectrónicos y Microtecnología (ISOM) (UPM) |
| Department: | Ingeniería Electrónica |
| Creative Commons Licenses: | Recognition - No derivative works - Non commercial |
Abstract
The influence of the environment on the optical properties of self-assembled In0.5Ga0.5As surface quantum dots is studied as a function of different ambient conditions for sensing applications. Their room temperature photoluminescence (PL) quenches under vacuum and decreases strongly under dry O2 or N2 environments. Nevertheless, they have a strong signal at 1.55 lm in air or in a wet atmosphere. The presence of water molecules in the environment improves the PL intensity likely due to its polar character and therefore its easier adsorption by the surface dangling bonds, leading to a suppression of the non-radiative recombination centers.
Funding Projects
Type
Code
Acronym
Leader
Title
Madrid Regional Government
S2009/ESP-1503
Unspecified
Unspecified
Unspecified
More information
| Item ID: | 22294 |
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| DC Identifier: | https://oa.upm.es/22294/ |
| OAI Identifier: | oai:oa.upm.es:22294 |
| DOI: | 10.1063/1.3697992 |
| Official URL: | http://scitation.aip.org/content/aip/journal/apl/1... |
| Deposited by: | Memoria Investigacion |
| Deposited on: | 09 Feb 2014 09:20 |
| Last Modified: | 26 Mar 2023 13:04 |
