【學(xué)術(shù)報告】超快極化激元動力學(xué)：化學(xué)動力學(xué)與量子信息科學(xué)的新應(yīng)用
日期：2023-11-01
閱讀：2145
題目：超快極化激元動力學(xué)：化學(xué)動力學(xué)與量子信息科學(xué)的新應(yīng)用
報告人：Prof. Wei?Xiong
時間：2023年11月1日（星期三）16：00-17:00
地點：霞光樓200號
邀請人：嚴(yán)暢 副教授
報告人簡介
Wei Xiong is a Professor and Kent Wilson Faculty Scholar in the Department of Chemistry and Biochemistry at the University of California, San Diego. Wei received his B.S. degree from Peking University, China, in 2006. He then joined Prof. Martin Zanni's group at the University of Wisconsin, Madison, and completed his Ph.D. degree in 2011. Wei then moved to the University of Colorado, Boulder, in 2011, where he worked with Prof. Margaret Murnane and Henry Kapteyn. He joined thefaculty at the University of California San Diego in 2014. At UCSD, Wei's research focuses on using and developing ultrafast nonlinear spectroscopic and imaging tools to reveal molecular structures and dynamics of materials, including ultrafast dynamics of polaritonic systems, guest molecule adsorptionsin self-assembled materials, femtosecond charge transfer dynamics on organic material interfaces. Wei is a recipient of Sloan Research Fellow, Coblentz Award, and Journal of Physical Chemistry C Lectureship.
近期關(guān)于超快極化激元的新進展：Science, 2020, 368, 665-667; Science, 2022, 378, 790-794; Acc. Chem. Res. 2023, 56, 776–786.
報告摘要
Through?the?strong?coupling?of?molecular?vibrational?modes?with?photonic?modes,?intriguing?molecular?vibrational?polariton?states?and?dark?reservoir?modes?emerge.?These?polaritons,?exhibiting?a?dual?nature?of?matter?and?light,?have?the?potential?to?modify?chemical?reactions?under?thermally?activated?conditions,?paving?the?way?for?the?emerging?field?of?polariton?chemistry.?Distinguishing?polaritons?from?dark?modes?has?been?challenging,?but?ultrafast?two-dimensional?infrared?(2D?IR)?spectroscopy?proved?instrumental?in?overcoming?this?hurdle.?Our?research?demonstrated?that?polaritons?facilitate?intra-?and?intermolecular?vibrational?energy?transfer,?providing?a?means?to?control?vibrational?energy?flow?in?liquid-phase?molecular?systems.?Moreover,?in?studying?a?single-step?isomerization?event,?we?confirmed?polaritons'?role?in?modifying?chemical?dynamics?under?strong?coupling?conditions,?while?dark?modes?behaved?like?uncoupled?molecules,?leaving?dynamics?unchanged.?This?finding?solidified?the?central?concept?of?polariton?chemistry?and?laid?the?groundwork?for?designing?future?polariton?cavities.?Beyond?polariton?chemistry,?we?leveraged?2D?IR?spectroscopy?to?explore?molecular?polaritons?as?a?quantum?simulation?platform,?revealing?their?potential?for?coherence?transfer?and?non-Hermitian?dynamics.?Challenges?remain,?but?understanding?polaritons?opens?new?possibilities?in?chemistry?and?quantum?information?science.
