Demonstration of terahertz ferroelectric metasurface using a simple and scalable fabrication method
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2018-10-09 |
| Journal | Optics Express |
| Authors | Jingyi Tian, Fredrik Laurell, Valdas PaÅ”iÅ”keviÄius, Min Qiu, Hoon Jang |
| Institutions | Zhejiang University, KTH Royal Institute of Technology |
| Citations | 2 |
Abstract
Section titled āAbstractāWe report on experimental implementation of a ferroelectric metasurface using an x-cut KTiOPO<sub>4</sub> (KTP) crystal for efficient manipulation of terahertz (THz) radiation. Based on the multipolar resonances that are accommodated in KTP micro-blocks in a square array, the metasurface is fabricated by precision diamond-blade dicing. Adjusting the size of the KTP micro-blocks to tailor the relative spectral positions of the anisotropic multipolar resonances, we demonstrate a subwavelength-thin THz polarizer that functions as a transparent film in the y-direction and a magnetic mirror in the z-direction with a transmission contrast of 13 dB near 0.37 THz (820 Āµm). The ferroelectric-based all-dielectric metasurface will provide a versatile platform to engineer the THz waves in the far field and could potentially be combined with THz generation in the same material.