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Updated: Feb 10, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
Published on: June 7, 2019
Anomalous Wavelength Scaling of Tightly Coupled Terahertz Metasurfaces
Ji-Hun Kang1, Seo-Joo Lee2, Bong Joo Kang3
1Department of Physics , University of California at Berkeley , Berkeley , California 94720 , United States.
Abstract:
We theoretically and experimentally demonstrate the drastic changes in the wavelength scaling of tightly coupled metasurfaces caused by deep subwavelength variations in the distance between the unit resonators but no change in the length scale of the units themselves. This coupling-dependent wavelength scaling is elucidated by our model metasurfaces of ring resonators arranged with deep subwavelength lattice spacing g, and we show that narrower g results in rapider changes in wavelength scaling. Also, by using terahertz time-domain spectroscopy, we experimentally observed a significant shift of the spectral response arising from very small variations in lattice spacing, confirming our theoretical predictions.
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