Allen, D. G., Kim, S., Stanley, C. R. and Sherwin, M. S. (2008) High fidelity optical readout of excited-state lifetimes and ionization of hydrogenic donors in GaAs. Applied Physics Letters, 93(18), (doi: 10.1063/1.3020222)
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Abstract
Optical detection of terahertz-frequency Rydberg transitions of neutral donors in GaAs is demonstrated via state-dependent resonance fluorescence from the neutral donor bound exciton ((DX)-X-0) transition. The intensity of the elastically scattered light is proportional to the fraction of donor-bound electrons in the (bright) ground state; excited state and ionized donors are dark. Resonance fluorescence recovery after terahertz excitation yields a single-shot, time-resolved measurement of the lifetime of the lowest excited (2P(-)) state. We also demonstrate contactless detection of electron ionization/capture via the ionized donor exciton (D+X) transition.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Stanley, Professor Colin |
Authors: | Allen, D. G., Kim, S., Stanley, C. R., and Sherwin, M. S. |
College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
Journal Name: | Applied Physics Letters |
ISSN: | 0003-6951 |
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