利用飞秒激光脉冲研究暴露于α后CR-39聚合物的非线性光学性质

IF 1.8 4区 物理与天体物理 Q3 OPTICS Journal of The Optical Society of America B-optical Physics Pub Date : 2023-10-05 DOI:10.1364/josab.501523
mona ali, M. F. Eissa, Tarek Hassan
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引用次数: 0

摘要

采用z扫描技术研究了α粒子辐射对聚碳酸二烯丙基二甘醇(CR-39)聚合物非线性光学性质的影响。CR-39聚合物暴露于不同剂量的α粒子:23.7 Gy和47.5 Gy。α粒子在聚合物CR-39中引起显著的光学和化学变化。紫外可见光谱数据表明,随着α粒子剂量的增加,聚合物的吸收边红移,能带隙减小。α辐照样品的傅里叶变换红外吸收光谱显示,与原始样品相比,构成CR-39聚合物的化学基团的强度和键断裂发生了变化。在100fs激光脉冲和80mhz重复频率下,测量了不同辐照剂量、不同激发波长和激光峰值功率下原始聚合物的非线性吸收系数和非线性折射率。样品表现出负非线性折射率和反向饱和吸收行为,具有三光子吸收。结果表明,α粒子辐射增强了CR-39的非线性光学性质。
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Using Femtosecond Laser Pulses to Explore the Nonlinear Optical Properties of a CR-39 Polymer after being Exposed to Alpha
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.
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来源期刊
CiteScore
4.00
自引率
5.30%
发文量
374
审稿时长
2.1 months
期刊介绍: The Journal of the Optical Society of America B (JOSA B) is a general optics research journal that complements JOSA A. It emphasizes scientific research on the fundamentals of the interaction of light with matter such as quantum optics, nonlinear optics, and laser physics. Topics include: Advanced Instrumentation and Measurements Fiber Optics and Fiber Lasers Lasers and Other Light Sources from THz to XUV Light-Induced Phenomena Nonlinear and High Field Optics Optical Materials Optics Modes and Structured Light Optomechanics Metamaterials Nanomaterials Photonics and Semiconductor Optics Physical Optics Plasmonics Quantum Optics and Entanglement Quantum Key Distribution Spectroscopy and Atomic or Molecular Optics Superresolution and Advanced Imaging Surface Optics Ultrafast Optical Phenomena Wave Guiding and Optical Confinement JOSA B considers original research articles, feature issue contributions, invited reviews and tutorials, and comments on published articles.
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