Development of a Compact, Tunable, Pulsed Laser System for Mid - Infrared Spectroscopy

南加州大学的Andrey F.Vilesov教授和Hanna Reisler教授受到化学研究仪器和设备开发(CRIF-ID)计划的资助，该计划旨在开发用于中红外(4-12微米)分子光谱的脉冲、连续可调的激光光源。该设计基于T=4K的固体对氢的受激背向拉曼散射(SRS)，该项目旨在探索固体对氢作为一种新的产生SRS的介质，并优化和扩展其产生激光的性能。中红外光谱区可以获得有机分子的特征振动，如羰基和氰基，以及C-C骨架模式。激光系统正在进行从超音速分子束的光谱学和自由基动力学到氦液滴的光谱学等实验。在中红外光谱区域可以访问的振动模式通常用于分析和光谱应用。用户友好的中红外激光光源的可获得性将影响物理和化学科学的各种研究领域，并使基础实验能够在通信、化学传感器和化学反应控制等领域取得进展。

Professors Andrey F. Vilesov and Hanna Reisler of the University of Southern California are funded by the Chemistry Research Instrumentation and Facilities: Instrument Development (CRIF-ID) program to develop a pulsed, continuously tunable laser source for molecular spectroscopy in the mid-infrared (4-12 micrometer) region. The design is based on stimulated backward Raman scattering (SRS) in solid para-hydrogen at T = 4 K. The project is exploring solid para-hydrogen as a new medium for SRS generation and optimizing and extending its performance for laser generation. The mid-infrared spectral region allows access to characteristic vibrations of organic molecules such as carbonyl and cyano groups, as well as to C-C skeletal modes. The laser system is being tested in experiments ranging from spectroscopy and dynamics of free radicals in supersonic molecular beams to spectroscopy in helium droplets.The vibrational modes accessible in the mid-infrared spectral region are routinely used in analytical and spectroscopic applications. The availability of a user-friendly, mid-infrared laser source will impact diverse research fields in the physical and chemical sciences and enable basic experiments that lead to advances in areas such as communications, chemical sensors and chemical reaction control.