Picosecond Transient Photoconductivity in Functionalized Pentacene Molecular Crystals Probed by Terahertz Pulse Spectroscopy

Autor:	Frank A. Hegmann, Joseph E. Bullock, K. P. H. Lui, John E. Anthony, Rik R. Tykwinski
Rok vydání:	2002
Předmět:	Materials science business.industry Terahertz radiation Photoconductivity General Physics and Astronomy Photoexcitation Pentacene chemistry.chemical_compound chemistry Excited state Picosecond Optoelectronics Spectroscopy business Ultrashort pulse
Zdroj:	Physical Review Letters. 89
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.89.227403
Popis:	We have measured transient photoconductivity in functionalized pentacene molecular crystals using ultrafast optical pump--terahertz probe techniques. The single crystal samples were excited using 800 nm, 100 fs pulses, and the change in transmission of time-delayed, subpicosecond terahertz pulses was used to probe the photoconducting state over a temperature range from 10 to 300 K. A subpicosecond rise in photoconductivity is observed, suggesting that mobile carriers are a primary photoexcitation. At times longer than 4 ps, a power-law decay is observed consistent with dispersive transport.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f26e81e0b85267628c7a8485a96e9575 https://doi.org/10.1103/physrevlett.89.227403 Zobrazit plný text záznamu