Accessing new avenues of photonic bandgaps using two-dimensional non-Moiré geometries

R Rachel Darthy; C Venkateswaran; V Subramanian; Zhengbiao Ouyang; N Yogesh

doi:10.1038/s41598-023-44385-z

Accessing new avenues of photonic bandgaps using two-dimensional non-Moiré geometries

Sci Rep. 2023 Oct 10;13(1):17077. doi: 10.1038/s41598-023-44385-z.

Authors

R Rachel Darthy¹, C Venkateswaran¹, V Subramanian², Zhengbiao Ouyang³, N Yogesh⁴

Affiliations

¹ Department of Nuclear Physics, School of Physical Sciences, University of Madras, Chennai, 600025, India.
² Microwave Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai, 600036, India.
³ Terahertz Technical Research Center, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China.
⁴ Department of Physics, National Institute of Technology Calicut, Kozhikode, 673601, Kerala, India. yogesh@nitc.ac.in.

Abstract

Photonic crystals (PhC) formed by 2-D non-Moiré geometries are realized in this work. Non-Moiré (NM) tiles are the contours of trigonometric functions that generate exciting shapes and geometries. Photonic bandstructure calculations reveal that 2-D NM geometries exhibit new avenues of photonic bandgaps compared to the regular circular rod-based PhCs. The band structures are anisotropic and show, intriguing orientation-dependent partial bandgaps. A few of the orientation-dependent frequency selective properties of the realized NM geometry-based PhCs are demonstrated using full-wave electromagnetic simulations. The proposed geometries are practically realizable, and in this work, we experimentally demonstrate the fabrication process using the 3-D printing technique for microwave frequencies.