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 advanced nonlinear/ultrafast optical spectroscopic techniques, aiming to elucidate the light-matter interactions at interfaces and novel quantum materials. We particularly focus on physical chemistry phenomena at liquid water surfaces – the most important platform for chemical and biological processes. We probe vibrations of the interfacial molecules selectively by nonlinear optical means, offering the unique opportunity to establish the structure-property-function relation of the water interfaces on the molecular level. We are also interested in nonlinear optics of quantum materials, particularly the effect of quantum geometry of the band structure on the nonlinear photocurrent generation. The study promotes the development of next-generation optoelectronic and solar-energy applications.
Ultrafast spectroscopy for quantum materials, Nonlinear optics, Laser spectroscopy, surface physical chemistry
- Y.-J. Chan, S. M. Faizanuddin, R. Kalaivanan, S. Raman, H. Lin, U. Kar, A. K. Singh, W.-L. Lee, R. K. Vankayala, M.-N. Ou, and Y. C. Wen*, 2024, “Origin of Nonlinear Photocurrents in Chiral Multifold Semimetal CoSi Unveiled by Terahertz Emission Spectroscopy”, PHYSICAL REVIEW B, 110, L201118.
- C. L. Liao, S. M. Faizanuddin, J. Haruyama, W.-S. Liao*, and Y. C. Wen*, 2024, “Effects of Chain-Chain Interaction on the Configuration of Short-Chain Alkanethiol Self-Assembled Monolayers on A Metal Surface”, JOURNAL OF CHEMICAL PHYSICS, 160, 214711.
- C.-W. Hu, C.-Y. Lu, Y.-C. Wen, and H.-W. Chen*, 2024, “An Economical Single-Shot Pulse Picker without Nonlinear Effect and Dispersion”, REVIEW OF SCIENTIFIC INSTRUMENTS, 95, 013003.
- L. Dalstein, K.-Y. Chiang, and Y.-C. Wen*, 2023, “Surface Potential at Electrolyte/Air Interfaces: A Quantitative Analysis via Sum-Frequency Vibrational Spectroscopy”, JOURNAL OF PHYSICAL CHEMISTRY B, 127 (21), 4915-4921.
- 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).
- 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).
- 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).
- 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).
- 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).
- 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).
- 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).
- 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
Characterization of topological optoelectronic devices. The candidate will be devoted to execute laser spectroscopic experiments and analyze the data.
Preferred Intern Education Level
Undergraduate or graduate students
Skill sets or Qualities
We are looking for two enthusiastic interns with background on ultrafast laser, optical spectroscopy, physical chemistry, material science, and/or electrical engineering.