Photonic Crystal 180° Ring-Shaped Hybrid: From Microwave to Optics
- 10 September 2021
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 33 (21), 1165-1168
- https://doi.org/10.1109/lpt.2021.3109633
Abstract
In this paper, a 180° ring-shaped hybrid based on the photonic crystal structure (PCS) is presented. The ring hybrid is designed for the operation wavelength of 1550 nm. Initially, a 180° hybrid is a design based on conventional microwave procedures. Different wave behavior inside the structure in THz and microwave frequency band has caused the wave propagation in this structure to change especially in terms of phase. By analyzing the field distribution within a structure, the rod arrangement is modified. In proposed structure, the phase difference between the output ports is greatly improved (about 90°). Also, by reducing the leakage and improving the matching, the output power of the ports tends to half power. Moreover, 32 nm wavelength shift is improved. The proposed structure’s reflectance value is less than 20 dB at the desired wavelength. The power splitting ratio between the two output ports is improved up to -3.7 dB and the power of the isolated port is less than -20 dB. This work has been analyzed using the FDTD method.Keywords
Funding Information
- Semnan University
This publication has 30 references indexed in Scilit:
- Compact substrate integrated waveguide mono-pulse antenna arrayInternational Journal of RF and Microwave Computer-Aided Engineering, 2017
- Radiative Guides for Decreasing Reflection at Output Ends of Photonic-Crystal Optical WaveguidesIEEE Photonics Technology Letters, 2012
- Plasmonic couplers with metal nonlinearitiesPhysics Letters A, 2011
- Broadband high-efficiency surface-plasmon-polariton coupler with silicon-metal interfaceApplied Physics Letters, 2009
- Photonic crystal resonator integrated in a microfluidic systemOptics Letters, 2008
- Fine Structure Constant Defines Visual Transparency of GrapheneScience, 2008
- Carbon WonderlandScientific American, 2008
- A Novel Reduced-Size Rat-Race Broadside Coupler and Its Application for CMOS Distributed Sub-Harmonic MixerIEEE Microwave and Wireless Components Letters, 2008
- Nanopin Plasmonic Resonator Array and Its Optical PropertiesNano Letters, 2007
- Proposal for ideal 3-dB splitters–combiners in photonic crystalsOptics Letters, 2005