TY - JOUR
T1 - Measurement of two-photon absorption cross-section in organic molecular salt with linear and circular polarized radiation
AU - Dharmadhikari, A. K.
AU - Sandhu, A. S.
AU - Dharmadhikari, J. A.
AU - Mishra, A.
AU - Kumar, G. R.
PY - 2004/7
Y1 - 2004/7
N2 - We report on the investigation of two-photon absorption (TPA) in 4′-Diethylamino-N-Methyl-4-Stilbazolium Tosylate (DEST) with 40 picosecond, 1064 nm linear and circular polarization laser radiation. The TPA cross-section σ2 measured is larger for linear polarized radiation (948 GM) than that for the circular polarized radiation (840 GM). The large TPA cross-section of DEST facilitates highly directional and efficient TPA induced upconverted emission in the range of 590-640 nm even though the fluorescence efficiency of DEST is very low (∼ 0.5%). The net single pass efficiency of upcon-version is ∼ 7%.
AB - We report on the investigation of two-photon absorption (TPA) in 4′-Diethylamino-N-Methyl-4-Stilbazolium Tosylate (DEST) with 40 picosecond, 1064 nm linear and circular polarization laser radiation. The TPA cross-section σ2 measured is larger for linear polarized radiation (948 GM) than that for the circular polarized radiation (840 GM). The large TPA cross-section of DEST facilitates highly directional and efficient TPA induced upconverted emission in the range of 590-640 nm even though the fluorescence efficiency of DEST is very low (∼ 0.5%). The net single pass efficiency of upcon-version is ∼ 7%.
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U2 - 10.1007/s00340-004-1527-1
DO - 10.1007/s00340-004-1527-1
M3 - Article
AN - SCOPUS:3142716660
SN - 0946-2171
VL - 79
SP - 235
EP - 238
JO - Applied Physics B: Lasers and Optics
JF - Applied Physics B: Lasers and Optics
IS - 2
ER -