| Publication Type |
Journal Article |
| School or College |
College of Engineering |
| Department |
Materials Science & Engineering |
| Creator |
Scarpulla, Michael |
| Other Author |
Zide, Joshua M. O.; LeBeau, James M.; Van de Walle, Chris G.; Gossard, Arthur C.; Delaney, Kris T. |
| Title |
Near-infrared absorption and semimetal-semiconductor transition in 2 nm ErAs nanoparticles embedded in GaAs and AlAs |
| Date |
2008 |
| Description |
We report strong near-infrared absorption peaks in epitaxial films of GaAs and AlAs containing approximately 0.5-5% of the semimetal ErAs. The energy of the resonant absorption peak can be changed from 0.62 to 1.0 eV (2.2-1.4 μm) by variation of the ErAs volume fraction and the substrate temperature. We interpret the infrared absorption in terms of transitions across an energy gap caused by a confinement-induced semimetal-semiconductor transition. An effective mass model relates the changes in nanoparticle diameter observed in transmission electron microscopy to the energy gap. |
| Type |
Text |
| Publisher |
American Institute of Physics (AIP) |
| Journal Title |
Applied Physics Letters |
| Volume |
92 |
| Issue |
17 |
| First Page |
173116 |
| DOI |
10.1063/1.2908213 |
| citatation_issn |
36951 |
| Subject |
Near-infrared absorption; Semimetal-semiconductor transition; GaAs; AlAs; ErAs; Gallium arsenide; Aluminum arsenide |
| Subject LCSH |
Nanoparticles; Thin films; Semiconductors -- Optical properties; Absorption spectra; Epitaxy |
| Language |
eng |
| Bibliographic Citation |
Scarpulla, M. A., Zide, J. M. O., LeBeau, J. M., Van de Walle, C. G., Gossard, A. C., & Delaney, K. T. (2008). Near-infrared absorption and semimetal-semiconductor transition in 2 nm ErAs nanoparticles embedded in GaAs and AlAs. Applied Physics Letters, 92(17), 173116. |
| Rights Management |
(c)American Institute of Physics. The following article appeared in Scarpulla, M. A., Zide, J. M. O., LeBeau, J. M., Van de Walle, C. G., Gossard, A. C., & Delaney, K. T., Applied Physics Letters, 92(17), 2008 and may be found at http://dx.doi.org/10.1063/1.2908213 |
| Format Medium |
application/pdf |
| Format Extent |
453,499 bytes |
| Identifier |
ir-main,12252 |
| ARK |
ark:/87278/s6n01r54 |
| Setname |
ir_uspace |
| ID |
707188 |
| Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6n01r54 |
