Publication Type |
Journal Article |
School or College |
College of Science |
Department |
Physics |
Creator |
Vardeny, Zeev Valentine |
Other Author |
Frolov, S. V.; Yoshino, K. |
Title |
Cooperative and stimulated emission in poly(p-phenylene-vinylene) thin films and solutions |
Date |
1998-04 |
Description |
We discuss cooperative and stimulated emissions and separate their respective contributions to the emission spectral narrowing in thin films and solutions of poly(p-phenylene-vinylene) derivatives. Whereas cooperative radiation is favored in films with poor optical confinement, directional stimulated emission is dominant in dilute solutions and thin films with superior optical confinement. Spectral narrowing in the latter case could be achieved by increasing either the excitation length or excitation intensity, from which we determined the optical gain and loss coefficients at the 0-1 emission band assuming a simple amplified spontaneous emission model. We found that the threshold excitation intensity for stimulated emission in neat films is mainly determined by self-absorption and that the gain saturates at emission intensities of about 107 W/cm2. |
Type |
Text |
Publisher |
American Physical Society |
Journal Title |
Physical Review B |
Volume |
57 |
Issue |
15 |
First Page |
9141 |
Last Page |
9147 |
DOI |
10.1103/PhysRevB.57.9141 |
citatation_issn |
0163-1829 |
Subject |
pi-conjugated polymers; PPV; Spectral narrowing |
Subject LCSH |
Photoemission; Lasers; Thin films -- Optical properties |
Language |
eng |
Bibliographic Citation |
Frolov, S. V., Vardeny, Z. V., & Yoshino, K. (1998). Cooperative and stimulated emission in poly(p-phenylene-vinylene) thin films and solutions. Physiccal Review B, 57(15), 9141-7. |
Rights Management |
(c) American Physical Society http://dx.doi.org/10.1103/PhysRevB.57.9141 |
Format Medium |
application/pdf |
Format Extent |
150,452 bytes |
Identifier |
ir-main,9892 |
ARK |
ark:/87278/s67m0sds |
Setname |
ir_uspace |
ID |
705864 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s67m0sds |