SUBPICOSECOND REAL-SPACE CHARGE-TRANSFER IN GAAS/ALAS TYPE-II SUPERLATTICES
We report time-resolved anti-Stokes Raman scattering measurements of short-period GaAs/AlAs type II superlattices which reveal directly that q approximately 0 confined and interface optical phonons are emitted by electrons when they transfer from the Γ valley in the GaAs layers to the X, valley in t...
| Main Authors: | , , , , , |
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| Format: | Conference item |
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Publ by IOP Publishing Ltd
1992
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| _version_ | 1797070933470478336 |
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| author | Depaula, A Maciel, A Weber, G Ryan, J Dawson, P Foxon, C |
| author_facet | Depaula, A Maciel, A Weber, G Ryan, J Dawson, P Foxon, C |
| author_sort | Depaula, A |
| collection | OXFORD |
| description | We report time-resolved anti-Stokes Raman scattering measurements of short-period GaAs/AlAs type II superlattices which reveal directly that q approximately 0 confined and interface optical phonons are emitted by electrons when they transfer from the Γ valley in the GaAs layers to the X, valley in the AlAs layers in structures where the Γ-X2 separation is greater than the optical phonon energy. The transfer time is estimated from the risetime of the non-equilibrium phonon population to be ≅ 1 ps. |
| first_indexed | 2024-03-06T22:46:05Z |
| format | Conference item |
| id | oxford-uuid:5d3b0815-184c-4458-8cb0-8ac6d799485b |
| institution | University of Oxford |
| last_indexed | 2024-03-06T22:46:05Z |
| publishDate | 1992 |
| publisher | Publ by IOP Publishing Ltd |
| record_format | dspace |
| spelling | oxford-uuid:5d3b0815-184c-4458-8cb0-8ac6d799485b2022-03-26T17:33:11ZSUBPICOSECOND REAL-SPACE CHARGE-TRANSFER IN GAAS/ALAS TYPE-II SUPERLATTICESConference itemhttp://purl.org/coar/resource_type/c_5794uuid:5d3b0815-184c-4458-8cb0-8ac6d799485bSymplectic Elements at OxfordPubl by IOP Publishing Ltd1992Depaula, AMaciel, AWeber, GRyan, JDawson, PFoxon, CWe report time-resolved anti-Stokes Raman scattering measurements of short-period GaAs/AlAs type II superlattices which reveal directly that q approximately 0 confined and interface optical phonons are emitted by electrons when they transfer from the Γ valley in the GaAs layers to the X, valley in the AlAs layers in structures where the Γ-X2 separation is greater than the optical phonon energy. The transfer time is estimated from the risetime of the non-equilibrium phonon population to be ≅ 1 ps. |
| spellingShingle | Depaula, A Maciel, A Weber, G Ryan, J Dawson, P Foxon, C SUBPICOSECOND REAL-SPACE CHARGE-TRANSFER IN GAAS/ALAS TYPE-II SUPERLATTICES |
| title | SUBPICOSECOND REAL-SPACE CHARGE-TRANSFER IN GAAS/ALAS TYPE-II SUPERLATTICES |
| title_full | SUBPICOSECOND REAL-SPACE CHARGE-TRANSFER IN GAAS/ALAS TYPE-II SUPERLATTICES |
| title_fullStr | SUBPICOSECOND REAL-SPACE CHARGE-TRANSFER IN GAAS/ALAS TYPE-II SUPERLATTICES |
| title_full_unstemmed | SUBPICOSECOND REAL-SPACE CHARGE-TRANSFER IN GAAS/ALAS TYPE-II SUPERLATTICES |
| title_short | SUBPICOSECOND REAL-SPACE CHARGE-TRANSFER IN GAAS/ALAS TYPE-II SUPERLATTICES |
| title_sort | subpicosecond real space charge transfer in gaas alas type ii superlattices |
| work_keys_str_mv | AT depaulaa subpicosecondrealspacechargetransferingaasalastypeiisuperlattices AT maciela subpicosecondrealspacechargetransferingaasalastypeiisuperlattices AT weberg subpicosecondrealspacechargetransferingaasalastypeiisuperlattices AT ryanj subpicosecondrealspacechargetransferingaasalastypeiisuperlattices AT dawsonp subpicosecondrealspacechargetransferingaasalastypeiisuperlattices AT foxonc subpicosecondrealspacechargetransferingaasalastypeiisuperlattices |