Journal
OPTICS EXPRESS
Volume 19, Issue 8, Pages 7068-7076Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.19.007068
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Funding
- Japan Society for the Promotion of Science [21510134]
- Ministry of Education, Culture, Sports, Science and Technology of Japan [22109007]
- Grants-in-Aid for Scientific Research [21510134] Funding Source: KAKEN
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We succeeded in making a silver split-ring (SR) structure of approximately 130 nm in diameter on a glass substrate using a nanosphere lithography technique. The light scattering spectrum in visible near-infrared region of a single, isolated SR was measured using a microscope spectroscopy optical system. The electromagnetic field enhancement spectrum and distribution of the SR structure were simulated by the finite-difference time-domain method, and the excitation modes were clarified. The long wavelength peak in the light scattering spectra corresponded to a fundamental LC resonance mode excited by an incident electric field. It was shown that a single SR structure fabricated as abovementioned can operate as a resonator and generate a magnetic dipole. (C) 2011 Optical Society of America
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