Details

Autor(en) / Beteiligte

• Buchnev, O.
• Podoliak, N.
• Kaltenecker, K.
• Walther, M.
• Kaczmarek, M.
• Fedotov, V. A.

Titel

Ultra-Thin Terahertz Spatial Phase Modulator Based on Metamaterial-Enhanced Liquid-Crystal Cell

Ist Teil von

• 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2019, p.1-1

Ort / Verlag

IEEE

Erscheinungsjahr

2019

Quelle

IEEE Explore

Beschreibungen/Notizen

• Summary form only given. We demonstrate experimentally a very thin THz spatial phase modulator based on planar metamaterials hybridysed with a liquid-crystal (LC) cell. Our approach brings about a new family of LC-enabled but optically thin THz devices for efficient control and manipulation of THz wavefronts. In the present work we take the above concept one step further and experimentally realize an optically thin large-area spatial phase modulator. It consists of two layers of THz planar metamaterials separated by a 12 μm thick LC layer (See Figure 1). Besides enhancing optical anisotropy of the LC layer, the metamaterials also act as spatially addressable electrodes, which transform the resulting structure into an array of sub-wavelength pixels with independently controlled electromagnetic phase.