Texas Tech University

Myoung-Hwan Kim, Ph.D.

Assistant Professor
Department of Physics and Astronomy

Email: myounghwan.kim@ttu.edu

Room Number: 111 Science Building

Ph.D. Physics, The State University of New York at Buffalo (2010)

M.S. Physics, POSTECH, Korea (1999)

B.S. Physics, Hanyang University, Korea (1997)

Photo Description

Research Interests

My research interests are to understand the novel physical properties of strongly correlated materials of fundamental interest, and to further develop their potential for infrared applications, especially in the field of nanophotonics and quantum information.

SURFACE POLARITONIC METASURFACES

Gradient optical metasurfaces have been used to demonstrate a wavefront control of light in free space and in optical waveguides by imposing spatially varying optical responses to the light. However, the control of light localized and propagating on surface has been challenging because the surface waves scatter intensively to the metallic metasurfaces causing the optical loss. “Can we find new metasurfaces platform to tailor the surface waves of light?” The project addresses the challenge by understanding fundamentally the near-field interaction between surface waves of light and surface charge oscillations confined in gradient metasurfaces. The program will deal with the technologically important long-wavelength infrareds and result in producing active flat optical components, perfect infrared absorbers, narrow-band thermal emitters and detectors, optical isolators, and phase modulators in mid and far infrared.

QUANTUM STATES IN RECONFIGURABLE NOISY ENVIRONMENT

Fault-tolerant quantum operation requires a robustness to classical environmental noise which causing decoherence of the quantum state. Error correction in gate-based quantum computation or sensing promises scalable quantum computation. However, the error correction has been performed in passive environment which limits the realistic error model. In this project, we will construct a reconfigurable environment near quantum states. The active environment will provide many degrees of freedom to correct quantum noise and errors in both space and time.

MID/FAR INFRARED ANOMALOUS HALL EFFECT

The objective of this project is to address the fundamental question of how intrinsic and extrinsic anomalous Hall effect (AHE) behaviors evolve at finite frequencies and to provide insight into new developing ideas about how to resolve quasiparticle scatterings in the time-reversal symmetry broken system. The infrared Hall angle measurement is one of the most powerful ways to disclose Fermi surface information from simple ferromagnetic metal systems to highly correlated electron systems including normal state superconductivity. The Hall results are comparable with the results acquired from angular-resolved photoemission spectroscopy (ARPES) and de Hass-van Alphen oscillations at dc. The proposed research investigates the AHE at underexplored infrared spectral regions using a newly developed broadband Hall angle measurement system which allows observation of frequency evolutions of quasiparticle scattering mechanisms in the time-reversal symmetry broken system. This study will benefit many unresolved AHE systems including ferromagnetic metals, itinerant ferromagnets, diluted magnetic semiconductors, and the understanding of other Hall effect systems including the quantum AHE system and spin Hall system.  

Selected Publications

C. Wang, Z. Li, M.-H. Kim, X. Xiong, X.-F. Ren, G.-C. Guo, N. Yu, and M. Loncar, "Metasurface-assisted phase-matching-free second harmonic generation in lithium niobate waveguidesNature Communications Vol. 8, 2098 (2017)

Z. Li, M.-H. Kim, C. Wang, Z. Han, S. Shrestha, A. C. Overvig, M. Lu, A. Stein, A. M. Agarwal, M. Loncar, and N. Yu, "Controlling propagation and coupling of waveguide modes using phase-gradient metasurfaces," Nature Nanotechnology Vol. 12, 675 - 68 (2017).

M.-H. Kim, J. Yan, R. J. Suess, T. E. Murphy, M. S. Fuhrer, and H. D. Drew, "Photothermal response in dual-gated bilayer graphene," Phys. Rev. Lett. Vol. 110, 247402 (2013).

J. Yan, M.-H. Kim, J. A. Elle, A. B. Sushkov, G. S. Jenkins, H. M. Milchberg, M. S. Fuhrer, and H. D. Drew, "Dual-gated bilayer graphene hot electron bolometer," Nature Nanotechnology Vol. 7, 472 – 478 (2012).

M.-H. Kim, G. Acbas, M.-H. Yang, I. Ohkubo, H. Christen, D. Mandrus, M. A. Scarpulla, O. D. Dubon, Z. Schlesinger, P. Khalifah, and J. Cerne, "Determination of the infrared complex magnetoconductivity tensor in itinerant ferromagnets from Faraday and Kerr measurements," Phys. Rev. B Vol. 75, 214416 (2007).

Department of Physics and Astronomy