Space-charge wave excitation by superposition of static and moving interference patterns

Autor(en): Hilling, B.
Schemme, T. 
Voit, K. -M.
Schmidt, H. -J.
Imlau, M. 
Stichwörter: BI12SIO20; ELECTRIC-FIELD; Materials Science; Materials Science, Multidisciplinary; PHOTOREFRACTIVE CRYSTALS; Physics; Physics, Applied; Physics, Condensed Matter; RECTIFICATION; SEMICONDUCTORS; TRAP-RECHARGING WAVES
Erscheinungsdatum: 2009
Herausgeber: AMER PHYSICAL SOC
Journal: PHYSICAL REVIEW B
Volumen: 80
Ausgabe: 20
Zusammenfassung: 
The optical excitation of space-charge waves (SCW) has been realized experimentally by superposition of static and moving light interference patterns with Bi12GeO20 as an example. A clear resonance behavior of the ac detected in an external electric circuit, as well as an inverse dispersion law, is verified, and a low frequency signal due to a modulation of the photoconductivity appears. The results are compared to the classical method using an oscillating light pattern for excitation. The optimized method allows for the detection of the charge carriers participating in SCW formation and yields an excitation of higher quality.
ISSN: 24699950
DOI: 10.1103/PhysRevB.80.205118

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