Tunable band structure in two-dimensional magnetized plasma photonic crystal for sensing applications in terahertz frequencies

We study the tunable band structure of two-dimensional magnetized plasma photonic crystal by variation of the external magnetic field. The crystal is composed of silica (SiO 2 ) in the background and titania (TiO 2 )- plasma rods with honeycomb lattice in a special arrangement. The modified plane wa...

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Bibliographic Details
Published in:European physical journal plus 2023-10, Vol.138 (10), p.949, Article 949
Main Authors: Gharaati, Abdolrasoul, Esmaeili, Fariba
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Atomic
Band structure of solids
Bandwidths
Complex Systems
Condensed Matter Physics
Crystals
Eigenvalues
Frequency ranges
Lattice parameters
Magnetic fields
Mathematical and Computational Physics
Molecular
Optical and Plasma Physics
Photonic band gaps
Photonic crystals
Physics
Physics and Astronomy
Plane waves
Plasma
Regular Article
Sensors
Silica
Silicon dioxide
Terahertz frequencies
Theoretical
Titanium dioxide
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Summary:We study the tunable band structure of two-dimensional magnetized plasma photonic crystal by variation of the external magnetic field. The crystal is composed of silica (SiO 2 ) in the background and titania (TiO 2 )- plasma rods with honeycomb lattice in a special arrangement. The modified plane wave expansion method is used to investigate photonic band gaps. A photonic gap map is plotted as the function of the external magnetic field in the range of 1 to 10 T accompanied by a band structure to show the correspondence. Results show that the external magnetic field can tune the photonic band gaps by influencing the dielectric function of plasma and producing appropriate dielectric contrast. An increase in the external magnetic field creates a great number of photonic band gaps and shifts them to higher frequencies. The relative bandwidths are also the function of the external magnetic field. They increase by increasing the external magnetic field. Our findings also show that the lattice constant at least should be in the range of millimeters to have a tunable band structure as the function of the external magnetic field. We can have tunable photonic band gaps in the terahertz frequency range by this special arrangement of plasma, SiO 2 , and TiO 2 which are applicable in designing sensors.
ISSN:2190-5444
2190-5444
DOI:10.1140/epjp/s13360-023-04580-3