Abstract

The effect of alpha particle radiation on nonlinear optical properties of poly(allyl diglycol carbonate) (CR-39) polymer has been investigated using the Z-scan technique. CR-39 polymers were exposed to alpha particles at different doses: 23.7 and 47.5 Gy. Alpha particles cause significant optical and chemical changes in the polymer CR-39. Data from UV-visible spectrometers revealed that when alpha particle doses increased, the absorption edge of polymer redshifted and the energy band gap decreased. Fourier transform infrared absorption spectra of alpha irradiation samples show a change in intensity and bond breakage in the chemical groups constituting the CR-39 polymer compared to the pristine one. With 100 fs laser pulses and 80 MHz repetition rate, the nonlinear absorption coefficient and nonlinear refractive index are measured for a pristine and irradiated polymer with different alpha doses at different excitation wavelengths and laser peak power. The samples displayed a negative nonlinear refractive index and reverse saturable absorption behavior with three photons absorption. The results reveal that the nonlinear optical properties of CR-39 were enhanced by alpha particle radiation.

© 2023 Optica Publishing Group

Measuring the nonlinear optical properties of indium tin oxide thin film using femtosecond laser pulses

Mona Ali, Abdullah Shehata, Mohamed Ashour, Wael Z. Tawfik, Reinhold Schuch, and Tarek Mohamed
J. Opt. Soc. Am. B 37(11) A139-A146 (2020)

Experimental investigation of linear and third-order nonlinear optical properties of pure CuO thin film using femtosecond laser pulses

Mohamed Ashour, M. Sh. Abdel-Wahab, Abdullah Shehata, Wael Z. Tawfik, M. A. Azooz, Souad A. Elfeky, and Tarek Mohamed
J. Opt. Soc. Am. B 39(2) 508-518 (2022)

Cobalt enhanced nonlinear optical properties and optical limiting of zinc oxide irradiated by femtosecond laser pulses

Abdullah Shehata, Wael Z. Tawfik, and Tarek Mohamed
J. Opt. Soc. Am. B 37(11) A1-A8 (2020)

Evolution of the linear and nonlinear optical properties of femtosecond laser exposed fused silica

Arnaud Royon, Clara Rivero-Baleine, Arnaud Zoubir, Lionel Canioni, Michel Couzi, Thierry Cardinal, Evelyne Fargin, Martin Richardson, and Kathleen Richardson
J. Opt. Soc. Am. B 26(11) 2077-2083 (2009)

Femtosecond Z-scan and degenerate four-wave mixing measurements of real and imaginary parts of the third-order nonlinearity of soluble conjugated polymers

Marek Samoc, Anna Samoc, Barry Luther-Davies, Zhenan Bao, Luping Yu, Bing Hsieh, and Ullrich Scherf
J. Opt. Soc. Am. B 15(2) 817-825 (1998)