An Ultra-high Quality Factor Terahertz Photonic Crystal Cavity

Mai Van Ta, Anh Thi Nguyen, Huong Thi Thu Tran, Hung Tuan Nguyen, Linh Thuy Nguyen, Hoang Huy Nguyen, Manh Duy Luong

Abstract


High quality factor Terahertz (THz) cavities are highly desired for many THz applications. This paper presents an ultra-high quality factor terahertz planar photonic crystal cavity at 300 GHz range. Two approaches are employed to reduce the losses in the cavity increasing the quality factor of the cavity. Firstly, short embedded photonic crystal waveguides are employed to reduce the in – plane loss. Secondly, a novel way of hole displacement is adopted for four edged holes of the L3 – type photonic crystal cavity to decrease the radiation loss. An ultra – high quality factor of 65000 at a resonant frequency of 315.3 GHz was achieved for the designed cavity. This result could enable promising applications such as THz sensing.


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References


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DOI: http://dx.doi.org/10.21553/rev-jec.345

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