Selective mode excitation in dye-doped DNA polyvinyl alcohol thin film.
A solid-state laser based on a dye-doped deoxyribonucleic acid (DNA) matrix is described. A thin solid film of DNA has been fabricated by treating with polyvinyl alcohol (PVA) and used as a host for the laser dye Rhodamine 6G. The edge emitted spectrum clearly indicated the existence of laser modes and amplified spontaneous emission. Lasing was obtained by pumping with a frequency-doubled Nd:YAG laser at 532 nm. For a pump energy of 10 mJ/pulse, an intense line with FWHM approximately 0.2 nm was observed at 566 nm due to selective mode excitation.
Balan
Nithyaja
N
International School of Photonics, Cochin University of Science and Technology, Cochin, India. nithyaja_b@yahoo.com
Hari
Misha
M
Nampoori
Vadakkedathu Parameswaran Narayana
VP
D001672:Biocompatible Materials; D004396:Coloring Agents; D004247:DNA / Q000528:radiation effects*; D053844:Lasers, Solid-State; D055620:Optical Phenomena; D011142:Polyvinyl Alcohol; D012235:Rhodamines; D013053:Spectrophotometry
D001672:Biocompatible Materials; D004396:Coloring Agents; D012235:Rhodamines; C026188:rhodamine 6G; D011142:Polyvinyl Alcohol; D004247:DNA