Physicist
Physicist

Biography

Chih-Feng Wang is a physicist in the Physical Sciences Division at Pacific Northwest National Laboratory, and he specializes in nanospectroscopy and nanoimaging. He obtained his PhD in optical science and engineering from the University of New Mexico in 2019 after completing a master’s degree program in photonics, where he gained robust expertise in advanced near-field optical techniques and nanotechnology. He also holds a master’s degree in condensed matter physics and a bachelor’s degree in physics from National Chung Cheng University in Taiwan. Prior to his current role, Wang completed postdoctoral research at Pacific Northwest National Laboratory, where he developed multimodal hyperspectral nanoscopy techniques, significantly enhancing the characterization of nanomaterials. His pioneering research in tip-enhanced linear/nonlinear nano-optics has led to the achievement of subnanometer spatial resolution under ambient conditions, marking a significant milestone in the field. Throughout his academic and research journey, Wang has consistently expanded the frontiers of near-field optical science, providing valuable insights into quantum materials and advancing the capabilities of imaging technologies. His comprehensive research background underpins his innovative contributions to understanding and manipulating complex quantum material systems, driving scientific breakthroughs and future technology development.

Disciplines and Skills

  • Multimodal hyperspectral microscopy/nanoscopy
  • Nanospectroscopy
  • Nanoimaging
  • Tip-enhanced linear/nonlinear optics
  • Nanophotonics
  • Plasmonics

Education

PhD in optics, University of New Mexico

MS in optics, University of New Mexico

MS in physics, National Chung Cheng University

BS in physics, National Chung Cheng University

Affiliations and Professional Service

  • American Physical Society
  • The Optical Society of America
  • American Chemical Society
  • The Coblentz Society

Publications

2025

  • Excitation Laser Energy Dependence of the Gap-Mode TERS Spectra of WS2 and MoS2 on Silver. Andrey Krayev, Eleonora Isotta, Lauren Hoang, Jerry A. Yang, Kathryn Neilson, Minyuan Wang, Noah Haughn, Eric Pop, Andrew Mannix, Oluwaseyi Balogun, and Chih-Feng Wang. ACS Photonics 2025, 12, 3, 1535–1544. DOI: 10.1021/acsphotonics.4c02257
  • Imaging Domain Walls in van der Waals Ferroelectrics Using Tip-Enhanced Second Harmonic Generation. Alexander B. C. Mantilla, Chih-Feng Wang, Jacob Parker, Patrick Z. El-Khoury, and Yi Gu. The Journal of Physical Chemistry Letters 2025, 16, 7, 1673–1679. DOI: 10.1021/acs.jpclett.5c00082.

2024

  • Strong Surface-Enhanced Coherent Phonon Generation in van der Waals Materials. Christian Brennan, Alan G. Joly, Chih-Feng Wang, Ti Xie, Brian T. O’Callahan, Kevin Crampton, Alem Teklu, Leilei Shi, Ming Hu, Qian Zhang, Narayanan Kuthirummal, Hasitha Suriya Arachchige, Apoorva Chaturvedi, Hua Zhang, David Mandrus, Cheng Gong, and Yu Gong. The Journal of Physical Chemistry Letters 2024, 15, 42, 10442–10450. DOI: 10.1021/acs.jpclett.4c02208.
  • Optical Extinction-Based 3D Nano-Imaging of WS2 on Gold. Chih-Feng Wang, Pavel Valencia-Acuna, Andrey V. Krayev, and Patrick Z. El-Khoury. The Journal of Physical Chemistry Letters 2024, 15, 40, 10272–10277. DOI: 10.1021/acs.jpclett.4c02077.
  • Classical vs. Quantum Plasmon-induced Molecular Transformations at Metallic Nanojunctions. Alexander B. C. Mantilla, Chih-Feng Wang, Andrey Krayev, Yi Gu, Zachary D. Schultz, and Patrick Z. El-Khoury. Proceedings of the National Academy of Sciences 2024, 121, 14, e2319233121. DOI: 10.1073/pnas.2319233121.
  • Visualizing Nanoscale Heterogeneity in Perylene Thin Films via Tip-Enhanced Photoluminescence with Unsupervised Machine Learning. Pavel Valencia-Acuna, Kushal Rijal, Chih-Feng Wang, Maxim Ziatdinov, Wai-Lun Chan, and Patrick Z. El-Khoury. Chemical Communications 2024, 60, 7435-7438. DOI: 10.1039/D4CC01808G.

2023

  • Subnanometer Visualization of Spatially Varying Local Field Resonances that Drive Tip-Enhanced Optical Spectroscopy. Chih-Feng Wang, Andrey V. Krayev, and Patrick Z. El-Khoury. Nano Letters 2023, 23, 19, 9114–9118. DOI: 10.1021/acs.nanolett.3c03028.
  • Probing Local Optical Fields via Ultralow Frequency Raman Scattering from a Corrugated Probe. Chih-Feng Wang, Alexander B. C. Mantilla, Andrey Krayev, Yi Gu, and Patrick Z. El-Khoury. The Journal of Physical Chemistry Letters 2023, 14, 37, 8334–8338. DOI: 10.1021/acs.jpclett.3c02122.
  • Ambient Tip-Enhanced Two Photon Photoluminescence from CdSe/ZnS Quantum Dots. Chih-Feng Wang, Alexander B. C. Mantilla, Yi Gu, and Patrick Z. El-Khoury. The Journal of Physical Chemistry A 2023, 127, 4, 1081–1084. DOI: 10.1021/acs.jpca.2c07750.

2022

  • Multipolar Raman Scattering vs Interfacial Nanochemistry: Case of 4-Mercaptopyridine on Gold. Alexander B. C. Mantilla, Chih-Feng Wang, Yi Gu, Zachary D. Schultz, and Patrick Z. El-Khoury. Journal of the American Chemical Society 2022, 144, 45, 20561–20565. DOI: 10.1021/jacs.2c10132.
  • Resonant Coherent Raman Scattering from WSe2. Chih-Feng Wang, and Patrick Z. El-Khoury. The Journal of Physical Chemistry A 2022, 126, 34, 5832–5836. DOI: 10.1021/acs.jpca.2c04120.
  • Multimodal (Non)Linear Optical Nanoimaging and Nanospectroscopy. Chih-Feng Wang, and Patrick Z. El-Khoury. The Journal of Physical Chemistry Letters 2022, 13, 31, 7350–7354. DOI: 10.1021/acs.jpclett.2c01993.
  • High-Resolution Raman Nano-Imaging with an Imperfect Probe. Chih-Feng Wang, Brian T. O’Callahan, Bruce W. Arey, Dmitry Kurouski, and Patrick Z. El-Khoury. The Journal of Physical Chemistry C 2022, 126, 8, 4089–4094. DOI: 10.1021/acs.jpcc.1c10459.

2021

  • Multimodal Tip-Enhanced Nonlinear Optical Nanoimaging of Plasmonic Silver Nanocubes. Chih-Feng Wang, and Patrick Z. El-Khoury. The Journal of Physical Chemistry Letters 2021, 12, 44, 10761–10765. DOI: 10.1021/acs.jpclett.1c03196.
  • Nanoindentation-Enhanced Tip-Enhanced Raman Spectroscopy. Chih-Feng Wang, Brian T. O’Callahan, Andrey Krayev, and Patrick Z. El-Khoury. The Journal of Chemical Physics 2021, 154, 241101. DOI: 10.1063/5.0056541.
  • Ambient Tip-Enhanced Photoluminescence with 5 nm Spatial Resolution. Chih-Feng Wang, Mikhail Zamkov, and Patrick Z. El-Khoury. The Journal of Physical Chemistry C 2021, 125, 22, 12251–12255. DOI: 10.1021/acs.jpcc.1c04012.
  • Mapping Molecular Adsorption Configurations with <5 nm Spatial Resolution through Ambient Tip-Enhanced Raman Imaging. Matthew Gabel, Brian T. O’Callahan, Chloe Groome, Chih-Feng Wang, Regina Ragan, Yi Gu, and Patrick Z. El-Khoury. The Journal of Physical Chemistry Letters 2021, 12, 14, 3586–3590. DOI: 10.1021/acs.jpclett.1c00661.
  • Imaging Plasmons with Sub-2 nm Spatial Resolution via Tip-Enhanced Four-Wave Mixing. Chih-Feng Wang, and Patrick Z. El-Khoury. The Journal of Physical Chemistry Letters 2021, 12, 14, 3535–3539. DOI: 10.1021/acs.jpclett.1c00763.

2020

  • Suppressing Molecular Charging, Nanochemistry, and Optical Rectification in the Tip-Enhanced Raman Geometry. Chih-Feng Wang, Brian T. O’Callahan, Dmitry Kurouski, Andrey Krayev, Zachary D. Schultz, and Patrick Z. El-Khoury. The Journal of Physical Chemistry Letters 2020, 11, 15, 5890–5895. DOI: 10.1021/acs.jpclett.0c01413.
  • The Prevalence of Anions at Plasmonic Nanojunctions: A Closer Look at p-Nitrothiophenol. Chih-Feng Wang, Brian T. O’Callahan, Dmitry Kurouski, Andrey Krayev, and Patrick Z. El-Khoury. The Journal of Physical Chemistry Letters 2020, 11, 10, 3809–3814. DOI: 10.1021/acs.jpclett.0c01006.
  • Spatio-Spectral Characterization of Multipolar Plasmonic Modes of Au Nanorods via Tip-Enhanced Raman Scattering. Ashish Bhattarai, Brian T. O’Callahan, Chih-Feng Wang, Shanyi Wang, and Patrick Z. El-Khoury. The Journal of Physical Chemistry Letters 2020, 11, 8, 2870–2874. DOI: 10.1021/acs.jpclett.0c00485.
  • Tip-Enhanced Multipolar Raman Scattering. Chih-Feng Wang, Zhihua Cheng, Brian T. O’Callahan, Kevin T. Crampton, Matthew R. Jones, and Patrick Z. El-Khoury. The Journal of Physical Chemistry Letters 2020, 11, 7, 2464–2469. DOI: 10.1021/acs.jpclett.0c00559.
  • A Closer Look at Corrugated Au Tips. Ashish Bhattarai, Kevin T. Crampton, Alan G. Joly, Chih-Feng Wang, Zachary D. Schultz, and Patrick Z. El-Khoury. The Journal of Physical Chemistry Letters 2020, 11, 5, 1915–1920. DOI: 10.1021/acs.jpclett.0c00305.