Investigating the thermal diffusivity of Pyrromethene 567 in different solvents using dual beam thermal lens spectroscopy

IF 2 3区物理与天体物理 Q3 OPTICS

Applied Physics B Pub Date : 2024-10-21 DOI:10.1007/s00340-024-08344-4

Titu Thomas, V. P. N Nampoori, Manu Vaishakh

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Abstract

The investigation of the thermo-optic characteristics of a material is vital in understanding the nonradiative relaxation processes occurring within the sample. Pyrromethene 567 a member of the laser dye family, has gained significant attention due to its excellent photo-physical characteristics, such as excellent laser efficiency, photostability, and quantum yield. The investigation of the photothermal studies in Pyrromethene 567 remains unexplored. Herein, a dual-beam thermal lens technique was performed to analyze the thermal lensing behaviour of Pyrromethene 567 in various solvents. The thermal diffusivity of Pyrromethene 567 in different solvents was calculated. There were no previous reports measuring the thermal diffusivity of Pyrromethene 567 dye. Thermal lens spectroscopy offers several advantages over conventional techniques because of its high sensitivity. The work also discusses the factors that influence the thermal lens signal in Pyrromethene 567. The influence of detector positioning, chopper frequency, and sample positioning, on thermal lens measurements was discussed. Additionally, the thermal lens experiments should be performed at intensities where diffraction patterns due to spatial self-phase modulation are absent to minimise experimental errors.

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利用双光束热透镜光谱法研究吡咯并噻吩 567 在不同溶剂中的热扩散率

研究材料的热光学特性对于了解样品内部发生的非辐射弛豫过程至关重要。作为激光染料家族的一员，Pyrromethene 567 因其出色的光物理特性（如出色的激光效率、光稳定性和量子产率）而备受关注。但对吡咯美仑 567 的光热研究仍处于探索阶段。本文采用双光束热透镜技术分析了吡咯并噻吩 567 在各种溶剂中的热透镜行为。计算了吡咯并烯 567 在不同溶剂中的热扩散率。以前没有报告测量过吡咯并噻吩 567 染料的热扩散率。热透镜光谱法因其高灵敏度而比传统技术更具优势。该研究还讨论了影响 Pyrromethene 567 热透镜信号的因素。讨论了探测器定位、斩波器频率和样品定位对热透镜测量的影响。此外，热透镜实验应在没有空间自相位调制引起的衍射图样的强度下进行，以尽量减少实验误差。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics B 物理-光学

CiteScore

4.00

自引率

4.80%

发文量

202

审稿时长

3.0 months

期刊介绍： Features publication of experimental and theoretical investigations in applied physics Offers invited reviews in addition to regular papers Coverage includes laser physics, linear and nonlinear optics, ultrafast phenomena, photonic devices, optical and laser materials, quantum optics, laser spectroscopy of atoms, molecules and clusters, and more 94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again Publishing essential research results in two of the most important areas of applied physics, both Applied Physics sections figure among the top most cited journals in this field. In addition to regular papers Applied Physics B: Lasers and Optics features invited reviews. Fields of topical interest are covered by feature issues. The journal also includes a rapid communication section for the speedy publication of important and particularly interesting results.