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

南加州大学的Andrey F. Vilesov和Hanna Reisler教授由化学研究仪器和设施：仪器开发（CRIF-ID）计划资助，开发用于中红外（4-12微米）区域分子光谱的脉冲连续可调谐激光源。该设计基于固体对氢在T = 4 K时的受激后向拉曼散射（SRS）。该项目正在探索固体对氢作为SRS生成的新介质，并优化和扩展其用于激光生成的性能。中红外光谱区允许访问有机分子的特征振动，如羰基和氰基，以及碳-碳骨架模式。激光系统正在进行各种实验测试，从超声波分子束中自由基的光谱学和动力学到氦滴的光谱学。中红外光谱区域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源的可用性将影响物理和化学科学的各个研究领域，并使基础实验能够导致通信，化学传感器和化学反应控制等领域的进步。

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.