Tailoring the slow light behavior in terahertz metasurfaces

Journal Article · Mon May 04 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4919531· OSTI ID:22398985

Manjappa, Manukumara; Cong, Longqing; Singh, Ranjan ^[1]; Chiam, Sher-Yi ^[2]; Bettiol, Andrew A. ^[3]; Zhang, Weili ^[4]

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1. Center for Disruptive Photonic Technologies, Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371 (Singapore)
2. NUS High School of Math and Science, 20 Clementi Avenue 1, Singapore, Singapore 129957 (Singapore)
3. Department of Physics, National University of Singapore, Science Drive 3, Singapore, Singapore 117542 (Singapore)
4. School of Electrical and Computer Engineering, Oklahoma State University, 202 Engineering South, Stillwater, Oklahoma 74078 (United States)

We experimentally study the effect of near field coupling on the transmission of light in terahertz metasurfaces. Our results show that tailoring the coupling between the resonators modulates the amplitude of resulting electromagnetically induced transmission, probed under different types of asymmetries in the coupled system. Observed change in the transmission amplitude is attributed to the change in the amount of destructive interference between the resonators in the vicinity of strong near field coupling. We employ a two-particle model to theoretically study the influence of the coupling between bright and quasi-dark modes on the transmission properties of the system and we find an excellent agreement with our observed results. Adding to the enhanced transmission characteristics, our results provide a deeper insight into the metamaterial analogues of atomic electromagnetically induced transparency and offer an approach to engineer slow light devices, broadband filters, and attenuators at terahertz frequencies.

• OSTI ID: 22398985
• Journal Information: Applied Physics Letters, Vol. 106, Issue 18; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLITUDES
ASYMMETRY
COUPLING
ELECTROMAGNETIC FILTERS
ELECTROMAGNETISM
FILTERS
INTERFERENCE
LIGHT TRANSMISSION
METAMATERIALS
OPACITY
PROBES
RESONATORS
THZ RANGE
VISIBLE RADIATION