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Observation of the two-photon transition enhanced first hyperpolarizability spectra in cinnamaldehyde derivatives: A femtosecond regime study.
- Source :
- Journal of Chemical Physics; 6/7/2023, Vol. 158 Issue 21, p1-11, 11p
- Publication Year :
- 2023
-
Abstract
- The application of nonlinear optical effects in optoelectronic devices is still scarce because the irradiance threshold necessary to induce a specific effect is very high. In this context, knowing the frequency-resolved first order molecular hyperpolarizability (β) is essential to identifying regions where this response is intense enough to allow for applications in commercial devices. Thus, herein, we have determined the β spectral dependence of five new push–pull cinnamylidene acetophenone derivatives using femtosecond laser-induced Hyper-Rayleigh Scattering (HRS). A considerable increase in β values was observed in molecules. We found remarkable β values in regions near the two-photon resonance, which are mediated by electron withdrawing and donating groups. This effect was mapped using wavelength-tunable femtosecond Z-scan technique. Furthermore, it was modeled in light of the sum-over-states approach for the second- and third-order nonlinearities. Finally, our outcomes suggest a strategy to obtain large β values mediated by the 2PA transition. [ABSTRACT FROM AUTHOR]
- Subjects :
- FEMTOSECOND pulses
ACETOPHENONE derivatives
OPTOELECTRONIC devices
Subjects
Details
- Language :
- English
- ISSN :
- 00219606
- Volume :
- 158
- Issue :
- 21
- Database :
- Complementary Index
- Journal :
- Journal of Chemical Physics
- Publication Type :
- Academic Journal
- Accession number :
- 164179362
- Full Text :
- https://doi.org/10.1063/5.0151622