Work

Thermal tunability in terahertz metamaterials fabricated on strontium titanate single-crystal substrates

Year: 2011

Type: article

Abstract: We report an experimental demonstration of thermal tuning of resonance frequency in a planar terahertz metamaterial consisting of a gold split-ring resonator array fabricated on a bulk single-crystal strontium titanate (SrTiO₃) substrate. Cooling the metamaterial starting from 409 K down to 150 K causes about a 43% shift in resonance frequency, and there is very little variation in resonance strength. The resonance shift is due to the temperature-dependent dielectric constant of the strontium titanate. The experiment opens up avenues for designing tunable terahertz devices by exploiting the temperature-sensitive characteristic of high dielectric constant substrates and complex metal oxide materials.

Source: Optics Letters

DOI: 10.1364/ol.36.001230

Authors: Ranjan Singh, Abul K. Azad, Q. X. Jia, Antoinette J. Taylor, Hou-Tong Chen

Institutions: Los Alamos National Laboratory, Center for Integrated Nanotechnologies

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funder: Los Alamos National Laboratory

Award: G75892134