An Ultra-high Quality Factor Terahertz Photonic Crystal Cavity

  • Mai Van Ta Le Quy Don Technical University
  • Anh Thi Nguyen Le Quy Don Technical University
  • Huong Thi Thu Tran Le Quy Don Technical University
  • Hung Tuan Nguyen Le Quy Don Technical University
  • Linh Thuy Nguyen Le Quy Don Technical University
  • Hoang Huy Nguyen Le Quy Don Technical University
  • Manh Duy Luong Le Quy Don Technical University
DOI: https://doi.org/10.21553/rev-jec.345

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.

Author Biographies

Mai Van Ta, Le Quy Don Technical University
Faculty of Radio Electronic Engineering
Anh Thi Nguyen, Le Quy Don Technical University
Faculty of Radio Electronic Engineering
Huong Thi Thu Tran, Le Quy Don Technical University
Faculty of Radio Electronic Engineering
Hung Tuan Nguyen, Le Quy Don Technical University
Faculty of Radio Electronic Engineering
Linh Thuy Nguyen, Le Quy Don Technical University
Faculty of Radio Electronic Engineering
Hoang Huy Nguyen, Le Quy Don Technical University
Faculty of Radio Electronic Engineering
Manh Duy Luong, Le Quy Don Technical University
Faculty of Radio Electronic Engineering

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Published
2024-03-30
Issue
Vol. 14, No. 1 (Jan-Mar, 2024)
Section
Regular articles
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