TY - GEN
T1 - Effect of polymer host on third order nonlinear optical properties of newly synthesized organic liquid crystal
AU - Shettigar, Seetharam
AU - Umesh, G.
AU - Poornesh, P.
AU - Murthy, Y. L N
PY - 2007/12/1
Y1 - 2007/12/1
N2 - We report the investigation of third order optical nonlinearity of 2,4,6-tri-(p-hyptoyoxylphenyl) pyrilium tetraborate doped PMMA using nanosecond laser pulses at 532nm wavelength by employing Z-Scan technique. To see the effect of polymer host, the results have been compared with the pure dopant. The material shows a large negative nonlinearity with real and imaginary parts of X(3) are - 3.31×10-14esu and 0.73×10 -14esu respectively. Excited state absorption cross-section is found to be 3.41×10-48 cm4.s/photon in PMMA host. The magnitude of third order nonlinear parameters increases when the compound is doped into PMMA matrix because of change in the conformation of chain geometry as a result of charge transfer processes. The values are comparable with a best known nonlinear liquid crystal molecule namely, 4-cyano-4'-n-pentylbiphenyl in the nematic phase. Hence, these molecules can be suitably used as nonlinear optical materials in PMMA matrix for device applications.
AB - We report the investigation of third order optical nonlinearity of 2,4,6-tri-(p-hyptoyoxylphenyl) pyrilium tetraborate doped PMMA using nanosecond laser pulses at 532nm wavelength by employing Z-Scan technique. To see the effect of polymer host, the results have been compared with the pure dopant. The material shows a large negative nonlinearity with real and imaginary parts of X(3) are - 3.31×10-14esu and 0.73×10 -14esu respectively. Excited state absorption cross-section is found to be 3.41×10-48 cm4.s/photon in PMMA host. The magnitude of third order nonlinear parameters increases when the compound is doped into PMMA matrix because of change in the conformation of chain geometry as a result of charge transfer processes. The values are comparable with a best known nonlinear liquid crystal molecule namely, 4-cyano-4'-n-pentylbiphenyl in the nematic phase. Hence, these molecules can be suitably used as nonlinear optical materials in PMMA matrix for device applications.
UR - https://www.scopus.com/pages/publications/47249158059
UR - https://www.scopus.com/pages/publications/47249158059#tab=citedBy
U2 - 10.1109/ICTONMW.2007.4446920
DO - 10.1109/ICTONMW.2007.4446920
M3 - Conference contribution
AN - SCOPUS:47249158059
SN - 9781424416394
T3 - ICTON-MW'07 - International Conference on Transparent Optical Networks "Mediterranean Winter" 2007 - Conference Proceedings
BT - ICTON-MW'07 - International Conference on Transparent Optical Networks "Mediterranean Winter" 2007 - Conference Proceedings
T2 - ICTON-MW'07 - International Conference on Transparent Optical Networks "Mediterranean Winter" 2007
Y2 - 6 December 2007 through 8 December 2007
ER -