Two-dimensional exciton behavior in GaN nanocolumns grown by molecular-beam epitaxy
We have investigated the behavior of excitons in GaN nanocolumns using time-integrated and time-resolved micro-photoluminescence measurements. In the weak confinement limit, the model of fractional-dimensional space gives an intermediate dimensionality of 2.14 for GaN nanocolumns, with an average di...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
American Institute of Physics
2005
|
| Subjects: |
| _version_ | 1797061650642108416 |
|---|---|
| author | Na, J Taylor, R Rice, J Robinson, J Lee, K Park, Y Park, C Kang, T |
| author_facet | Na, J Taylor, R Rice, J Robinson, J Lee, K Park, Y Park, C Kang, T |
| author_sort | Na, J |
| collection | OXFORD |
| description | We have investigated the behavior of excitons in GaN nanocolumns using time-integrated and time-resolved micro-photoluminescence measurements. In the weak confinement limit, the model of fractional-dimensional space gives an intermediate dimensionality of 2.14 for GaN nanocolumns, with an average diameter of 80 nm. Enhanced exciton and donor binding energies are deduced from a fractional-dimensional model and a phenomenological description. Time-integrated photoluminescence spectra as a function of temperature show a curved emission shift. Recombination dynamics are deduced from the temperature dependence of the PL efficiency and decay times. |
| first_indexed | 2024-03-06T20:34:16Z |
| format | Journal article |
| id | oxford-uuid:32176968-b6f9-4dd6-8fcc-d586a40569a8 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:34:16Z |
| publishDate | 2005 |
| publisher | American Institute of Physics |
| record_format | dspace |
| spelling | oxford-uuid:32176968-b6f9-4dd6-8fcc-d586a40569a82022-03-26T13:11:51ZTwo-dimensional exciton behavior in GaN nanocolumns grown by molecular-beam epitaxyJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:32176968-b6f9-4dd6-8fcc-d586a40569a8PhysicsCondensed Matter PhysicsEnglishOxford University Research Archive - ValetAmerican Institute of Physics2005Na, JTaylor, RRice, JRobinson, JLee, KPark, YPark, CKang, TWe have investigated the behavior of excitons in GaN nanocolumns using time-integrated and time-resolved micro-photoluminescence measurements. In the weak confinement limit, the model of fractional-dimensional space gives an intermediate dimensionality of 2.14 for GaN nanocolumns, with an average diameter of 80 nm. Enhanced exciton and donor binding energies are deduced from a fractional-dimensional model and a phenomenological description. Time-integrated photoluminescence spectra as a function of temperature show a curved emission shift. Recombination dynamics are deduced from the temperature dependence of the PL efficiency and decay times. |
| spellingShingle | Physics Condensed Matter Physics Na, J Taylor, R Rice, J Robinson, J Lee, K Park, Y Park, C Kang, T Two-dimensional exciton behavior in GaN nanocolumns grown by molecular-beam epitaxy |
| title | Two-dimensional exciton behavior in GaN nanocolumns grown by molecular-beam epitaxy |
| title_full | Two-dimensional exciton behavior in GaN nanocolumns grown by molecular-beam epitaxy |
| title_fullStr | Two-dimensional exciton behavior in GaN nanocolumns grown by molecular-beam epitaxy |
| title_full_unstemmed | Two-dimensional exciton behavior in GaN nanocolumns grown by molecular-beam epitaxy |
| title_short | Two-dimensional exciton behavior in GaN nanocolumns grown by molecular-beam epitaxy |
| title_sort | two dimensional exciton behavior in gan nanocolumns grown by molecular beam epitaxy |
| topic | Physics Condensed Matter Physics |
| work_keys_str_mv | AT naj twodimensionalexcitonbehavioringannanocolumnsgrownbymolecularbeamepitaxy AT taylorr twodimensionalexcitonbehavioringannanocolumnsgrownbymolecularbeamepitaxy AT ricej twodimensionalexcitonbehavioringannanocolumnsgrownbymolecularbeamepitaxy AT robinsonj twodimensionalexcitonbehavioringannanocolumnsgrownbymolecularbeamepitaxy AT leek twodimensionalexcitonbehavioringannanocolumnsgrownbymolecularbeamepitaxy AT parky twodimensionalexcitonbehavioringannanocolumnsgrownbymolecularbeamepitaxy AT parkc twodimensionalexcitonbehavioringannanocolumnsgrownbymolecularbeamepitaxy AT kangt twodimensionalexcitonbehavioringannanocolumnsgrownbymolecularbeamepitaxy |