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Novel D-π-A-π-D type organic chromophores for second harmonic generation and multi-photon absorption applications

Publication Type : Conference Proceedings

Publisher : AIP Conference Proceedings

Source :

Campus : Bengaluru

School : School of Engineering

Center : Amrita Innovation & Research

Department : Chemistry

Verified : Yes

Year : 2013

Abstract : We report here the optical and non-linear optical properties of six different novel bis-chalcones of D-π-A-π-D derivatives of diarylideneacetone (DBA). These derivatives have been synthesized by Claisen-Schmidt condensation reaction and were well characterized by using FTIR, 1HNMR, 13CNMR, UV-Visible absorption and mass spectroscopic techniques. The optical bandgap for each of the DBA derivatives were determined both experimentally (UV-Visible spectra & Tauc Plot) and theoretically by ab intio DFT calculations using SIESTA software package. They were found to be in close agreement with each other. The Second Harmonic Generation from these organic chromophores were studied by standard Kurtz and Perry Powder SHG method at 1064 nm. They were found to have superior SHG conversion efficiency when compared to urea (standard sample). Further, we investigated the Multi-Photon absorption properties were using conventional open aperture z-scan technique. These DBA derivatives exhibited strong two photon absorption in the order of 1e-11m/W. Hence, these are potential candidate for various photonic applications like optical power limiting, photonic switching and frequency conversion.

Cite this Research Publication :
Proceedings of the International Conference on Trends in Applied Physics and Material Science: RAM 2013. AIP Conference Proceedings, Volume 1536. AIP Conference Proceedings, Volume 1536, Issue 1, p.751-752

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