Frontier femtosecond mid‐infrared pump‐probe and 2DIR techniques: Advances in experimental methodologies

• DOI: 10.1002/bkcs.70020
• Publication Date: 2025-04-07T02:18:56Z
• Authors: Joongwon Shim; Kwanghee Park; Minhyuk Lee; Minharng Cho; JunWoo Kim; Kyungwon Kwak
• Keywords: Frontier

Abstract Mid‐infrared (MIR) spectroscopy has emerged as a pivotal tool for studying molecular dynamics with ultrafast time resolution, allowing precise investigations into structural changes, chemical reactions, and energy transfer processes. This review explores the transformative capabilities of femtosecond MIR techniques such pump‐probe (PP) two‐dimensional infrared (2DIR) spectroscopy, which offer unparalleled specificity in probing vibrations exploring complicated landscapes across diverse scientific fields. Advanced laser technologies, including pulse shapers asynchronous optical sampling (ASOPS), have significantly enhanced precision efficiency spectroscopic methods. ASOPS, particular, revolutionized time‐resolved studies by mitigating traditional mechanical delay stage limitations, enabling robust femtosecond‐to‐nanosecond noise reduction long‐term stability. provides comprehensive overview evolution strengths MIR‐based PP 2DIR emphasizing role ASOPS overcoming technical challenges. By delineating current methodologies, this aims to guide researchers selecting optimizing experimental configurations tailored their inquiries.