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Room-temperature efficient light detection by amorphous Ge quantum wells
- Source :
- Nanoscale Research Letters, Nanoscale research letters, 8 (2013): 128. doi:10.1186/1556-276X-8-128, info:cnr-pdr/source/autori:Cosentino S, Miritello M, Crupi I, Nicotra G, Simone F, Spinella C, Terrasi A, Mirabella S/titolo:Room-temperature efficient light detection by amorphous Ge quantum wells/doi:10.1186%2F1556-276X-8-128/rivista:Nanoscale research letters (Print)/anno:2013/pagina_da:128/pagina_a:/intervallo_pagine:128/volume:8
- Publication Year :
- 2013
-
Abstract
- In this work, ultrathin amorphous Ge films (2 to 30 nm in thickness) embedded in SiO2 layers were grown by magnetron sputtering and employed as proficient light sensitizer in photodetector devices. A noteworthy modification of the visible photon absorption is evidenced due to quantum confinement effects which cause both a blueshift (from 0.8 to 1.8 eV) in the bandgap and an enhancement (up to three times) in the optical oscillator strength of confined carriers. The reported quantum confinement effects have been exploited to enhance light detection by Ge quantum wells, as demonstrated by photodetectors with an internal quantum efficiency of 70%. © 2013 Cosentino et al.
- Subjects :
- Nanostructure
Photon
Materials science
Photodetector
CONFINEMENT
Blue shift
Optical oscillator strength
Materials Science(all)
Quantum confinement effect
Light detection
Quantum confinement
General Materials Science
Light absorption
Quantum well
Potential well
Nano Express
Photon absorption
SUPERLATTICES
Germanium
business.industry
Room temperature, Amorphous film
Internal quantum efficiency
NANOCLUSTERS
Semiconductor quantum well
Condensed Matter Physics
Nanostructures
Blueshift
Amorphous solid
Quantum dot
Optoelectronics
PHOTOLUMINESCENCE
Quantum efficiency
business
Ultrathin films, Germanium
Ge quantum well
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Nanoscale Research Letters, Nanoscale research letters, 8 (2013): 128. doi:10.1186/1556-276X-8-128, info:cnr-pdr/source/autori:Cosentino S, Miritello M, Crupi I, Nicotra G, Simone F, Spinella C, Terrasi A, Mirabella S/titolo:Room-temperature efficient light detection by amorphous Ge quantum wells/doi:10.1186%2F1556-276X-8-128/rivista:Nanoscale research letters (Print)/anno:2013/pagina_da:128/pagina_a:/intervallo_pagine:128/volume:8
- Accession number :
- edsair.doi.dedup.....fb07f55b22c0d6e76743f977e1a6a557