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[7a-A409-4] Voltage Controlled liquid crystal terahertz phase shifter with Mg doped CuCrO2
transparent electrodes
Keywords:terahertz, phase shifter, CuCrO2
Terahertz (THz) photonics have been attracted much attention due to its remarkable
progress [1]. Many LC devices in the visible to near-infrared range are driven using electric
fields applied through transparent electrodes such as indium tin oxide (ITO) thin films.
However, the inevitable absorption of ITO in THz region limits its application. [2] The
alternative electrode for THz is still desired although several of approach suc h as nano-structure
of reducing thickness of ITO have been proposed. In this work, Mg doped CuCrO2 films has
been demonstrated its high transmittance in THz region. photonics. In addition, liquid crystal
based terahertz (THz) phase shifter using CuCrO2:Mg as electrode was fabricated. Phase shift
of around 2π at 1 THz was demonstrated. This is the first time to our best knowledge that
CuCrO2:Mg can be used to fabricate THz phase shifter. The result reveal its potential for THz
photonics.
progress [1]. Many LC devices in the visible to near-infrared range are driven using electric
fields applied through transparent electrodes such as indium tin oxide (ITO) thin films.
However, the inevitable absorption of ITO in THz region limits its application. [2] The
alternative electrode for THz is still desired although several of approach suc h as nano-structure
of reducing thickness of ITO have been proposed. In this work, Mg doped CuCrO2 films has
been demonstrated its high transmittance in THz region. photonics. In addition, liquid crystal
based terahertz (THz) phase shifter using CuCrO2:Mg as electrode was fabricated. Phase shift
of around 2π at 1 THz was demonstrated. This is the first time to our best knowledge that
CuCrO2:Mg can be used to fabricate THz phase shifter. The result reveal its potential for THz
photonics.