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Title: Giant magneto-optical Kerr enhancement from films on SiC due to the optical properties of the substrate

Abstract

We report a giant enhancement of the midinfrared magneto-optical complex Kerr angle (polarization change of reflected light) in a variety of materials grown on SiC. In epitaxially grown multilayer graphene, the Kerr angle is enhanced by a factor of 68, which is in good agreement with Kerr signal modeling. Strong Kerr enhancement is also observed in Fe films grown on SiC and Al-doped bulk SiC. Our experiments and modeling indicate that the enhancement occurs at the high-energy edge of the SiC reststrahlen band where the real component of the complex refractive index n˜ passes through unity. Furthermore, since the signal is greatly enhanced when n˜ = 1, the enhancement is predicted to exist over the entire visible and IR spectrum for a free-standing film. We also predict similar giant enhancement in both Faraday (transmission) and Kerr rotation for thin films on a metamaterial substrate with refractive index n˜ = –1. Furthermore, this paper demonstrates that the substrate used in magneto-optical Kerr effect (MOKE) measurements must be carefully chosen when investigating magneto-optical materials with weak MOKE signals or when designing MOKE-based optoelectronic devices.

Authors:
 [1];  [2];  [1];  [1];  [1];  [1];  [3];  [4];  [3];  [3];  [3];  [3];  [3];  [1];  [4];  [1]
+ Show Author Affiliations
  1. State Univ. of New York, Buffalo, NY (United States)
  2. State Univ. of New York, Buffalo, NY (United States); U.S. Naval Research Lab., Washington, DC (United States)
  3. U.S. Naval Research Lab., Washington, DC (United States)
  4. Chinese Academy of Sciences (CAS), Beijing (China)
Publication Date:
Research Org.:
State Univ. of New York (SUNY), Albany, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Natural Science Foundation of China (NSFC); USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1610762
Alternate Identifier(s):
OSTI ID: 1496902
Grant/Contract Number:  
SC0004890; 51322211
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 99; Journal Issue: 8; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Materials science; Physics; Faraday effect; Kerr effect; Plasmonics

Citation Formats

Mukherjee, A., Ellis, C. T., Arik, M. M., Taheri, P., Oliverio, E., Fowler, P., Tischler, J. G., Liu, Y., Glaser, E. R., Myers-Ward, R. L., Tedesco, J. L., Eddy, Jr., C. R., Gaskill, D. Kurt, Zeng, H., Wang, G., and Cerne, J. Giant magneto-optical Kerr enhancement from films on SiC due to the optical properties of the substrate. United States: N. p., 2019. Web. doi:10.1103/physrevb.99.085440.
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Mukherjee, A., Ellis, C. T., Arik, M. M., Taheri, P., Oliverio, E., Fowler, P., Tischler, J. G., Liu, Y., Glaser, E. R., Myers-Ward, R. L., Tedesco, J. L., Eddy, Jr., C. R., Gaskill, D. Kurt, Zeng, H., Wang, G., & Cerne, J. Giant magneto-optical Kerr enhancement from films on SiC due to the optical properties of the substrate. United States. https://doi.org/10.1103/physrevb.99.085440
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Mukherjee, A., Ellis, C. T., Arik, M. M., Taheri, P., Oliverio, E., Fowler, P., Tischler, J. G., Liu, Y., Glaser, E. R., Myers-Ward, R. L., Tedesco, J. L., Eddy, Jr., C. R., Gaskill, D. Kurt, Zeng, H., Wang, G., and Cerne, J. Wed . "Giant magneto-optical Kerr enhancement from films on SiC due to the optical properties of the substrate". United States. https://doi.org/10.1103/physrevb.99.085440. https://www.osti.gov/servlets/purl/1610762.
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@article{osti_1610762,
title = {Giant magneto-optical Kerr enhancement from films on SiC due to the optical properties of the substrate},
author = {Mukherjee, A. and Ellis, C. T. and Arik, M. M. and Taheri, P. and Oliverio, E. and Fowler, P. and Tischler, J. G. and Liu, Y. and Glaser, E. R. and Myers-Ward, R. L. and Tedesco, J. L. and Eddy, Jr., C. R. and Gaskill, D. Kurt and Zeng, H. and Wang, G. and Cerne, J.},
abstractNote = {We report a giant enhancement of the midinfrared magneto-optical complex Kerr angle (polarization change of reflected light) in a variety of materials grown on SiC. In epitaxially grown multilayer graphene, the Kerr angle is enhanced by a factor of 68, which is in good agreement with Kerr signal modeling. Strong Kerr enhancement is also observed in Fe films grown on SiC and Al-doped bulk SiC. Our experiments and modeling indicate that the enhancement occurs at the high-energy edge of the SiC reststrahlen band where the real component of the complex refractive index n˜ passes through unity. Furthermore, since the signal is greatly enhanced when n˜ = 1, the enhancement is predicted to exist over the entire visible and IR spectrum for a free-standing film. We also predict similar giant enhancement in both Faraday (transmission) and Kerr rotation for thin films on a metamaterial substrate with refractive index n˜ = –1. Furthermore, this paper demonstrates that the substrate used in magneto-optical Kerr effect (MOKE) measurements must be carefully chosen when investigating magneto-optical materials with weak MOKE signals or when designing MOKE-based optoelectronic devices.},
doi = {10.1103/physrevb.99.085440},
journal = {Physical Review B},
number = 8,
volume = 99,
place = {United States},
year = {Wed Feb 27 00:00:00 EST 2019},
month = {Wed Feb 27 00:00:00 EST 2019}
}
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https://doi.org/10.1103/physrevb.99.085440
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