The Library
Energy level spectroscopy of InSb quantum wells using quantum-well LED emission
Tools
Tools
Tools
Tenev, T., Palyi, A., Mirza, B., Nash, G., Fearn, M., Smith, S., Buckle, L., Emeny, M., Ashley, Tim, Jefferson, J. and Lambert, C. (2009) Energy level spectroscopy of InSb quantum wells using quantum-well LED emission. Physical Review B (Condensed Matter and Materials Physics), Volume 79 (Number 8). Article number 085301. doi:10.1103/PhysRevB.79.085301 ISSN 1098-0121.
Research output not available from this repository.
Request-a-Copy directly from author or use local Library Get it For Me service.
Official URL: http://dx.doi.org/10.1103/PhysRevB.79.085301
Abstract
We have investigated the low-temperature optical properties of InSb quantum-well (QW) light-emitting diodes, with different barrier compositions, as a function of well width. Three devices were studied: QW1 had a 20 nm undoped InSb quantum well with a barrier composition of Al0.143In0.857Sb, QW2 had a 40 nm undoped InSb well with a barrier composition of Al0.077In0.923Sb, and QW3 had a 100 nm undoped InSb well with a barrier composition of Al0.025In0.975Sb. For QW1, the signature of two transitions (CB1-HH1 and CB1-HH2) can be seen in the measured spectrum, whereas for QW2 and QW3 the signature of a large number of transitions is present in the measured spectra. In particular transitions to HH2 can be seen, the first time this has been observed in AlInSb/InSb heterostructures. To identify the transitions that contribute to the measured spectra, the spectra have been simulated using an eight-band k.p calculation of the band structure together with a first-order time-dependent perturbation method (Fermi golden rule) calculation of spectral emittance, taking into account broadening. In general there is good agreement between the measured and simulated spectra. For QW2 we attribute the main peak in the experimental spectrum to the CB2-HH1 transition, which has the highest overall contribution to the emission spectrum of QW2 compared with all the other interband transitions. This transition normally falls into the category of “forbidden transitions,” and in order to understand this behavior we have investigated the momentum matrix elements, which determine the selection rules of the problem.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||
| Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 1098-0121 | ||||
| Official Date: | 2 February 2009 | ||||
| Dates: |
|
||||
| Volume: | Volume 79 | ||||
| Number: | Number 8 | ||||
| Article Number: | Article number 085301 | ||||
| DOI: | 10.1103/PhysRevB.79.085301 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
Request changes or add full text files to a record
Repository staff actions (login required)
 |
View Item |
