Optical Physics Lab (Wen group)
Research Field
Dr. Wen received his B.S. degree in Mechanical Engineering in 2004 and Ph.D. in Institute of Photonics and Optoelectronics in 2010 at National Taiwan University (NTU). His advisors as an undergraduate, postgraduate, and postdoc were Chih-Kung Lee (NTU), Chi-Kuang Sun (NTU), Maw-Kuen Wu (IoP/AS), and Yuen-Ron Shen (UC Berkeley), respectively. As a student and postdoctoral researcher, he was awarded several fellowships and honors, including MediaTek Fellowship, Outstanding Youth Award (NTU), Academia Sinica Postdoctoral Fellowship, Postdoctoral Scholar Publication Award (NSC, Taiwan). In 2016, Dr. Wen joined IoP/AS as an Assistant Research Fellow and currently specializes in surface physical chemistry and nonlinear optics at interfaces and quantum materials.
Optical Physics Lab (Wen group) is a multidisciplinary research team at Institute of Physics, Academia Sinica, Taiwan. We developed new optical spectroscopic techniques, aiming to elucidate the fundamental physics, chemistry, and light-matter interactions at surfaces/interfaces and novel quantum materials. By utilizing nonlinear optics and ultrafast optics, we experimentally characterize electronic and vibrational excitations at interfaces, ranging from water interfaces to topological semimetals, with femtosecond time resolution. These interfaces are relevant because of their key roles in many natural processes or the future optoelectronic applications. Our goal is to unravel the structure-property-function relation of the interfaces on the atomic/molecular level. These studies also shed new light on development of novel catalysts or quantum materials.
Surface physical chemistry, Ultrafast spectroscopy for quantum materials, Nonlinear optics, Laser spectroscopy
1. Y. Hsiao, T.-H. Chou, A. Patra, and Y.-C. Wen*, “Momentum-Resolved Sum-Frequency Vibrational Spectroscopy of Bonded Interface Layer at Charged Water Interfaces”, Sci. Adv., 9, eadg2823 (2023).
2. L. Dalstein, J.-R. Huang, and Y.-C. Wen*, “Wavelength-Scanning Second Harmonic Generation for Determining Absolute Charge Density at Aqueous Interfaces”, Opt. Lett., 45, 3733 (2020).
3. K.-Y. Chiang, L. Dalstein, and Y.-C. Wen*, “Affinity of Hydrated Protons at Intrinsic Water/Vapor Interface Revealed by Ion-Induced Water Alignment”, J. Phys. Chem. Lett., 11, 696 (2020).
4. L. Dalstein, K.-Y. Chiang, and Y.-C. Wen*, “Direct Quantification of Water Surface Charge by Phase-Sensitive Second Harmonic Spectroscopy,” J. Phys. Chem. Lett., 10, 5200 (2019).
5. X. Liu, G. Huang, K.-K. Hu, N. Sheng, C. Tian, Y. R. Shen, Y.-C. Wen, G. Shi*, and H. Fang, “Sharing of Na+ by Three -COO- Groups at Deprotonated Carboxyl-Terminated Self-Assembled Monolayers Charged Aqueous Interface,” J. Phys. Chem. C, 122, 9111 (2018).
6. Y.-C. Wen, S. Zha, C. Tian, and Y. R. Shen*, “Surface pH and Ion Affinity at the Alcohol-Monolayer/Water Interface Studied by Sum-Frequency Spectroscopy,” J. Phys. Chem. C, 120, 15224 (2016).
7. K.-H. Lin*, K.-J. Wang, C.-C. Chang, Y.-C. Wen, B. Lv, C.-W. Chu, and M.-K. Wu*, “Ultrafast Dynamics of Quasiparticles and Coherent Acoustic Phonons in Slightly Underdoped (BaK)Fe2As2,” Sci. Rep., 6, 25962 (2016).
8. Y.-C. Wen, S. Zha, X. Liu, S. Yang, P. Guo, G. Shi, H. Fang, Y. R. Shen*, and C. Tian*, “Unveiling Microscopic Structures of Charged Water Interfaces by Surface-Specific Vibrational Spectroscopy,” Phys. Rev. Lett., 116, 016101 (2016); selected as Featured in Physics; highlighted by Physics and ChemViews Magazine (2016); highly cited paper by Clarivate Analytics (the top 1 % of the academic field of Physics based on a highly cited threshold for the field and publication year.)
Dr. Wen received his B.S. degree in Mechanical Engineering in 2004 and Ph.D. in Institute of Photonics and Optoelectronics in 2010 at National Taiwan University (NTU). His advisors as an undergraduate, postgraduate, and postdoc were Chih-Kung Lee (NTU), Chi-Kuang Sun (NTU), Maw-Kuen Wu (IoP/AS), and Yuen-Ron Shen (UC Berkeley), respectively.
2 Vacancies
Job Description
The position is to develop and apply nonlinear/ultrafast laser spectroscopies to studies of (1) quantum phenomena of topological semimetals or (2) physical chemistry properties of water interfaces. The candidate will be devoted to execute laser spectroscopic experiments and analyze the data.
Preferred Intern Education Level
Suitable for third-year undergraduate students and above, especially for graduate students.
Skill sets or Qualities
We are looking for one qualified and enthusiastic group member with background on optics, physical chemistry, and/or condensed matter physics.