Youngjun Ahn

Education

• Ph.D. in Materials Science and Engineering, University of Wisconsin-Madison, 2020
• B.E. in Chemical and Molecular Engineering, Stony Brook University, 2014

Professional Experience 

• Postdoctoral research fellow, Department of Physics, University of Michigan, 2020-2024

Selected Publications

• Electric quadrupole second harmonic generation revealing dual magnetic order in a magnetic Weyl semimetal, Y. Ahn, X. Guo, R. Xue, K. Qu, K. Sun, D. Mandrus, and L. Zhao, Nat. Photon. 18, 26, (2024).
• Ultrafast switching of interfacial thermal conductance, Y. Ahn, J. Zhang, D. A. Walko, S. Hruszkewycz, E. E. Fullerton, P. G. Evans, and H. Wen, ACS Nano 17, 18843, (2023).
• X-ray nanodiffraction imaging reveals distinct nanoscopic dynamics of an ultrafast phase transition, Y. Ahn, M. J. Cherukara, Z. Cai, D. A. Walko, M. Bartlein, T. Zhou, E. E. Fullerton, M. V. Holt, P. G. Evans, and H. Wen, Proc. Natl. Acad. Sci. U. S. A. 119, e2118597119 (2022).
• Dynamic tilting of ferroelectric domain walls caused by optically induced electronic screening, Y. Ahn, H. J. Lee, J. Park, A. Pateras, A. S. Everhardt, S. Damerio, T. Zhou,A. D. DiChiara, H. Wen, B. Noheda,and P. G. Evans, Phys. Rev. Lett. 127, 097402 (2021).
• Nanosecond optically induced phase transformation in compressively strained BiFeO₃ on LaAlO₃, Y. Ahn, A. Pateras, S. D. Marks, H. Xu, T. Zhou, Z. Luo, Z. Chen, L. Chen, X. Zhang, A. DiChiara, H. Wen, and P. G. Evans, Phys. Rev. Lett. 123, 045703 (2019).
• Photoinduced domain pattern transformation in ferroelectric-dielectric superlattices, Y. Ahn, J. Park, A. Pateras, M. B. Rich, Q. Zhang, P. Chen, M. H. Yusuf, H. Wen, M. Dawber, and P. G. Evans, Phys. Rev. Lett. 119, 057601 (2017).