NADH各向异性弛豫的亚皮秒分辨率超灵敏瞬态时间分辨监测

2020 International Conference Laser Optics (ICLO) Pub Date : 2020-11-02 DOI:10.1109/ICLO48556.2020.9285929

Y. Beltukov, I. Gadzhiev, I. Gorbunova, M. Sasin, O. Vasyutinskii

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引用次数: 0

摘要

提出了一种新的超灵敏瞬态时间分辨监测方法，适用于研究飞秒激光脉冲激发下多原子分子和生物相关分子电子激发态的快速各向异性弛豫。该方法采用光弹性调制器调制泵浦光束偏振，并用锁相放大器记录差分瞬态信号，对探头光束的正交偏振分量进行高灵敏度平衡检测。利用该方法研究了辅酶NADH在不同粘度和极性溶液中第一电子激发态的各向异性弛豫。

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Ultrasensitive transient time-resolved monitoring of anisotropic relaxation in NADH with sub-picosecond resolution

A novel ultrasensitive transient time-resolved monitoring method has been developed suitable for studying of fast anisotropic relaxation in electronic excited states of polyatomic and biologically relevant molecules under excitation with femtosecond laser pulses. The method is based on the modulation of a pump beam polarization with a photo-elastic modulator and highly sensitive balanced detection of mutually orthogonal polarization components of a probe beam with following recording of the differential transient signal with a lock-in amplifier. The method was used for the study of anisotropic relaxation in the first electronic excited state of coenzyme NADH in solutions with various viscosity and polarity.

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2020 International Conference Laser Optics (ICLO)

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