Abstract
In this paper, we propose a 1D ternary photonic crystal with Silicon/MCP/Air structure, whose transmission properties have been analyzed. By employing the TMM, the transmittance spectra are plotted for the introduced TPC in four cases by varying the parameters: angle of incidence, lattice constant, static magnetic field, and electron density. The focus of this analysis is to illustrate the PBGs or zero-transmission regions (GHz) exhibited by the TPC in these four cases. In the first case, there exist three PBGs at normal incidence in which the first two bands are enhanced with increase in the incident angle, while the third band shows reverse nature. At the incident angle 89°, three sets of multiple sharp peaks of transmission, showing multichannel filter characteristics, occur in place of allowed regions, and such abnormal feature of the TPC is attributed to the existence of MCP. Next it is demonstrated that such TPC can be exploited as multiband reflectors for a larger lattice parameter with increased thickness of the Si layer. In the third and fourth cases, the first bandgap is found to be least sensitive to the variations in the parameters, while the tunability in second and third bands in both cases is opposite to each other. By comparing the features of this TPC with a binary PC of Silicon/MCP structure, the tunablity in the second bandgap is far better in case of TPC. Based on the investigated results, the TPC under different conditions may be a good candidate for various applications, including highly tunable broadband and multiband reflectors; and multichannel filters for dense wavelength division multiplexing and high-speed signal processing.
Highlights
In recent decades, photonic crystal (PC) has been a field of investigation to control the optical properties of materials viz. to unprecedented control of light in certain regions, to prohibit its propagation or to allow it to propagate only in certain directions and at certain frequencies [1,2]
We proposed a Silicon/Plasma/Air ternary 1D photonic crystal, whose transmission and reflection properties have been studied. We compare this ternary PC characteristics with a binary silicon/plasma PC, it is shown that such a ternary PC has higher number of bands for smaller angles which makes them a good candidate for making multi channel tunable filters [18] and for higher angle it behaves like broadband reflector
At angle 89°multiple sharp peaks of transmissions are obtained and the bandwidth of bandgaps is increasing.It is proposed that such ternary PC can be utilized in making multichannel tunable filter and for higher angle it behaves like broadband reflector
Summary
Photonic crystal (PC) has been a field of investigation to control the optical properties of materials viz. to unprecedented control of light in certain regions, to prohibit its propagation or to allow it to propagate only in certain directions and at certain frequencies [1,2]. Ternary structures with new chosen materials are under investigation for novel and efficient kind of tuning of the PBGs [16,17]. Motivated by their numerous advantages of ternary PC, we decided to work on plasma based Ternary PC. We proposed a Silicon/Plasma/Air ternary 1D photonic crystal, whose transmission and reflection properties have been studied We compare this ternary PC characteristics with a binary silicon/plasma PC, it is shown that such a ternary PC has higher number of bands for smaller angles which makes them a good candidate for making multi channel tunable filters [18] and for higher angle it behaves like broadband reflector
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