Sanghyeon Yu (유상현)

I am a postdoctoral researcher at ETH Zurich.

My advisor is Prof. Habib Ammari. I received my Ph.D. from KAIST under the supervision of Prof. Mikyoung Lim.


Affiliation: Seminar für Angewandte Mathematik, Department of Mathematics, ETH Zurich

Address: HG J 48, Rämistrasse 101, 8092 Zurich, Switzerland

Phone: +41 44 632 6965

Email: sanghyeon.yu (at) sam (dot) math (dot) ethz (dot) ch

CURRICULUM VITAE [Link]


RESEARCH INTEREST

  • Applied Mathematics, Partial Differential Equations (PDEs), Metamaterials, Wave Propagation, Inverse Problems, Invisibility Cloaking


PUBLICATIONS

Book

  1. H. Ammari, B. Fitzpatrick, H. Kang, M. Ruiz, S. Yu and H. Zhang, Mathematical and Computational Methods in Photonics and Phononics, Mathematical Surveys and Monographs, Volume 235 (2018), American Mathematical Society.

Papers

  1. H. Ammari, E. O. Hiltunen and S. Yu, Subwavelength guided modes for acoustic waves in bubbly crystals with a line defect, arXiv:1904.04512. [Link]
  2. H. Ammari, E. O. Hiltunen and S. Yu, A high-frequency homogenization approach near the Dirac points in bubbly honeycomb crystals, arXiv:1812.06178. [Link]
  3. H. Ammari, B. Fitzpatrick, H. Lee, E. O. Hiltunen and S. Yu, Honeycomb-lattice Minnaert bubbles, arXiv:1811.03905. [Link]
  4. S. Yu and H. Ammari, Hybridization of Singular Plasmons via Transformation Optics, arXiv:1807.09255. [Link]
  5. H. Kang and S. Yu, A proof of the Flaherty-Keller formula on the effective property of densely packed elastic composites, arXiv:1707.02205. [Link]
  6. M. Lim and S. Yu, Stress concentration for two nearly touching circular holes, arXiv:1705.10400. [Link]
  7. M. Lim and S. Yu, Asymptotic analysis for superfocusing of the electric field in between two nearly touching metallic spheres, arXiv:1412.2464. [Link]
  8. H. Kang and S. Yu, Quantitative characterization of stress concentration in the presence of closely spaced hard inclusions in two-dimensional linear elasticity, Archive for Rational Mechanics and Analysis 232 (2019), 121-196. [Link]
  9. H. Ammari, B. Fitzpatrick, E. O. Hiltunen and S. Yu, Subwavelength localized modes for acoustic waves in bubbly crystals with a defect, SIAM Journal on Applied Mathematics 78 (2018), 3316-3335. [Link]
  10. H. Ammari, B. Fitzpatrick, H. Lee, E. O. Hiltunen and S. Yu, Subwavelength resonances of encapsulated bubbles, to appear in Journal of Differential Equations. [Link]
  11. H. Ammari, D. Choi and S. Yu, A mathematical and numerical framework for near-field optics, Proceedings of the Royal Society A 474 (2018), 20180150. [Link]
  12. H. Ammari, M. Ruiz, S. Yu and H. Zhang, Reconstructing fine details of small objects by using plasmonic spectroscopic data. Part II: The strong interaction regime, SIAM Journal on Imaging Sciences 11 (2018), 1931–1953. [Link]
  13. H. Ammari, M. Ruiz, S. Yu and H. Zhang, Field expansions for systems of strongly coupled plasmonic nanoparticles, SIAM Journal on Numerical Analysis 56 (2018), 2029-2044. [Link]
  14. S. Yu and H. Ammari, Plasmonic interaction between nanospheres, SIAM Review (Research Spotlights section) 60 (2018), 356-385. [Link]
  15. H. Ammari, M. Ruiz, S. Yu, and H. Zhang, Reconstructing fine details of small objects by using plasmonic spectroscopic data, SIAM Journal on Imaging Sciences 11 (2018), 1-23. [Link]
  16. H. Ammari, M. Putinar, M. Ruiz, S. Yu and H. Zhang, Shape reconstruction of nanoparticles from their associated plasmonic resonances, Journal de Mathématiques Pures et Appliquées 122 (2019), 23-48. [Link]
  17. H. Ammari, W. Wu and S. Yu, Double-negative electromagnetic metamaterials due to chirality, Quaterly of Applied Mathematics 77 (2019), 105-130. [Link]
  18. H. Ammari, B. Fitzpatrick, H. Lee, S. Yu and H. Zhang, Double-negative acoustic metamaterials, to appear in Quaterly of Applied Mathematics. [Link]
  19. K. Ando, Y. Ji, H. Kang, K. Kim and S. Yu, Spectral properties of the Neumann-Poincaré operator and cloaking by anomalous localized resonance for the elasto-static system, European Journal of Applied Mathematics 29 (2018), 189– 225. [Link]
  20. K. Ando, H. Kang, K. Kim and S. Yu, Spectrum of Neumann-Poincaré operator on annuli and cloaking by anomalous localized resonance for linear elasticity, SIAM Journal on Mathematical Analysis 49 (2017), 4232-4250. [Link]
  21. H. Ammari, B. Fitzpatrick, H. Lee, S. Yu and H. Zhang, Subwavelength phononic bandgap opening in bubbly media, Journal of Differential Equations 263, (2017) 5610–5629. [Link]
  22. H. Kang, M. Lim and S. Yu, Spectral resolution of the Neumann-Poincaré operator on intersecting disks and analysis of plasmon resonance, Archive for Rational Mechanics and Analysis 226 (2017), 83-115. [Link]
  23. S. Yu and M. Lim, Shielding at a distance due to anomalous resonance, New Journal of Physics 19 (2017), 033018. [Link]
  24. H. Ammari, M. Ruiz, W. Wu, S. Yu, and H. Zhang, Mathematical and numerical framework for metasurfaces using thin layers of periodically distributed plasmonic nanoparticles, Proceedings of the Royal Society A 472 (2016), 20160445. [Link]
  25. H. Ammari, M. Ruiz, S. Yu, and H. Zhang, Mathematical analysis of plasmonic resonances for nanoparticles: the full Maxwell equations, Journal of Differential Equations 261 (2016), 3615-3669. [Link]
  26. H. Kang, K. Kim, H. Lee, J. Shin and S. Yu, Spectral properties of the Neumann-Poincaré operator and uniformity of estimates for the conductivity equation with complex coefficients, Journal of London Mathematical Society (2) 93 (2016), 519-546. [Link]
  27. M. Lim and S. Yu, Asymptotics of the solution to the conductivity equation in the presence of adjacent circular inclusions with finite conductivities, Journal of Mathematical Analysis and Applications 421 (2015), 131-156. [Link]
  28. H. Ammari, J. Garnier, H. Kang, M. Lim and S. Yu, Generalized polarization tensors for shape description, Numerische Mathematik 126 (2014), 199-224. [Link]
  29. H. Ammari, H. Kang, H. Lee, M. Lim and S. Yu, Enhancement of near cloaking for the full Maxwell equations, SIAM Journal on Applied Mathematics 73 (2013), 2055-2076. [Link]
  30. H. Ammari, P. Garapon, F. Jouve, H. Kang, M. Lim, and S. Yu, A new optimal control approach for the reconstruction of extended inclusions, SIAM Journal on Control and Optimization 51 (2013), 1372-1394. [Link]
  31. M. Lim and S. Yu, Reconstruction of the shape of an inclusion from Elastic Moment Tensors, Contemporary Mathematics 548, 2011.