Stallhofer, Markus and Kastl, Christoph and Braendlein, Marcel and Karnetzky, Christoph and Schuh, Dieter and Wegscheider, Werner and Holleitner, Alexander W. (2012) Propagation length of mesoscopic photocurrents in a two-dimensional electron gas. PHYSICAL REVIEW B, 86 (11): 115313. ISSN 2469-9950, 2469-9969
Full text not available from this repository. (Request a copy)Abstract
We investigate the average propagation length of photogenerated nonequilibrium electrons in a two-dimensional electron gas using a quantum point contact as a local photocurrent detector. To this end, electrons are photogenerated both quasiresonantly and nonresonantly to the optical interband transition in the quantum well comprising the two-dimensional electron gas. The photocurrent is analyzed as a function of the distance between the excitation spot in the two-dimensional electron gas and the detector. We find that the determined propagation length depends nonmonotonically on the laser intensity. We interpret the observation by an interplay of an enlarged scattering phase space of the photogenerated electrons and the screening of sample specific scatterers.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | QUANTUM POINT-CONTACT; INVERSION LAYERS; BRANCHED FLOW; SCATTERING; TRANSPORT; SPECTROSCOPY; MOBILITY; HETEROSTRUCTURES; LIFETIME; SYSTEM; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics Physics > Institute of Experimental and Applied Physics > Chair Professor Huber > Group Rupert Huber |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 06 May 2020 06:45 |
| Last Modified: | 06 May 2020 06:45 |
| URI: | https://pred.uni-regensburg.de/id/eprint/18124 |
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