Bandwidth Of Omnidirectional Photonic Band Gap Research Articles

Enlarged the omnidirectional Bragg gap by one-dimensional superconductor-dielectric photonic crystals with ternary Thue–Morse aperiodic structure

In this paper, an omnidirectional photonic band gap (OBG) which originates from Bragg gap compared to zero-n˜ gap or single negative (negative permittivity or negative permeability) gap, is realized by one-dimensional (1D) superconductor-dielectric photonic crystals (SDPCs) with ternary Thue–Mores aperiodic structure, which is composed of superconductor and two kinds of homogeneous, isotropic dielectric is theoretically investigated by the transfer matrix method (TMM) in detail. Such OBG is insensitive to the incident angle and the polarization of electromagnetic wave (EM wave). From the numerical results, the bandwidth and central frequency of OBG can be notably enlarged by tuning the thickness of superconductor and dielectric layers but cease to change with increasing Thue–Mores order. The OBG also can be manipulated by the ambient temperature of system especially close to the critical temperature. Moreover, the damping coefficient of superconductor has no effect on the bandwidth of OBG under low-temperature condition. These results may provide theoretical instructions to design the future optoelectronic devices based on superconductor.

Enlargement of the omnidirectional photonic band gap by one-dimensional plasma-dielectric photonic crystals with fractal structure

In this paper, an omnidirectional photonic band gap (OBG) which originates from Bragg gap compared to \(\text{ zero- }\overline{n}\) gap or single negative (negative permittivity or negative permeability) gap, realized by one-dimensional plasma-dielectric photonic crystals with fractal structure (Thue–Mores aperiodic structure), which is composed of plasma and one kind of homogeneous, isotropic dielectric is theoretically studied by the transfer matrix method in detail. Such OBG is insensitive to the incident angle and the polarization of electromagnetic wave. From the numerical results, the bandwidth and central frequency of OBG can be notably enlarged by tuning the thickness of plasma and dielectric layers but cease to change with increasing the Thue–Mores order. The OBG also can be manipulated by the plasma density. Moreover, the plasma collision frequency has no effect on the bandwidth of OBG.

Enlarged omnidirectional band gap in one-dimensional plasma photonic crystals with ternary Thue–Morse aperiodic structure

In this paper, an omnidirectional photonic band gap (OBG) which originates from Bragg gap compared to zero-n˜ gap or single negative (negative permittivity or negative permeability) gap, realized by one-dimensional (1D) plasma photonic crystals (PPCs) with ternary Thue–Morse aperiodic structure, which is composed of plasma and two kinds of homogeneous, isotropic dielectric is theoretically studied by the transfer matrix method (TMM) in detail. Such OBG is insensitive to the incident angle and the polarization of electromagnetic wave (EM wave). From the numerical results, the bandwidth and central frequency of OBG can be notably broadened by changing the thickness of plasma and dielectric layers but cease to change with increasing Thue–Morse order. The OBG also can be manipulated by plasma density. However, the plasma collision frequency has no effect on the bandwidth of OBG. These results may provide theoretical instructions to design the future optoelectronic devices based on plasma photonic crystals.

Properties of omnidirectional photonic band gap in one-dimensional staggered plasma photonic crystals

In this paper, the properties of the omnidirectional photonic band gap (OBG) realized by one-dimensional (1D) photonic crystals (PCs) with a staggered structure which is composed of plasma and isotropic dielectric layer have been theoretically studied by the transfer matrix method (TMM). From the numerical results, it has been shown that such OBG is insensitive to the incident angle and the polarization of electromagnetic wave (EM wave), and the frequency range and central frequency of OBG can be effectively controlled by adjusting the plasma frequency, the average thickness of plasma layer, the average thickness of dielectric layer and staggered parameters, respectively. The frequency range of OBG can be notably enlarged with increasing the plasma frequency, average thickness of plasma layer, respectively. Moreover, the bandwidth of OBG can be narrowed with increasing the average thickness of dielectric layer. Changing staggered parameters of dielectric and plasma layer means that the OBG can be tuned. It is shown that 1D plasma dielectric photonic crystals (PPCs) with such staggered structure have a superior feature in the enhancement of frequency range of OBG compared with the conventional 1D binary PPCs. This kind of OBG has potential applications in filters, microcavities, and fibers, etc.

Enhancement of Omnidirectional Photonic Bandgaps in One-Dimensional Superconductor–Dielectric Photonic Crystals with a Staggered Structure

In this paper, the properties of the omnidirectional photonic bandgap (OBG) realized by one-dimensional (1D) photonic crystals with a staggered structure which is composed of superconductor and isotropic dielectric have been theoretically investigated by the transfer matrix method (TMM). From the numerical results, it has been shown that such OBG is insensitive to the incident angle and the polarization of electromagnetic wave (EM wave), and the frequency range and central frequency of OBG can be tuned by the ambient temperature of system, the average thickness of superconductor layer, the average thickness of dielectric layer, and staggered parameters, respectively. The bandwidth of OBG can be notably enlarged with increasing average thickness and staggered parameter of superconductor layer. Moreover, the frequency range of OBG can be narrowed with increasing the average thickness, staggered parameter of dielectric layer, and ambient temperature, respectively. The damping coefficient of superconductor layer has no effect on the bandwidth of OBG under low-temperature conditions. It is shown that 1D superconductor–dielectric photonic crystals (SDPCs) have a superior feature in the enhancement of frequency range of OBG. This kind of OBG has potential applications in filters, microcavities, and fibers, etc.

PROPERTIES OF OMNIDIRECTIONAL PHOTONIC BAND GAPS IN FIBONACCI QUASI-PERIODIC ONE-DIMENSIONAL SUPERCONDUCTOR PHOTONIC CRYSTALS

In this paper, the properties of the omnidirectional photonic band gap (OBG) realized by one-dimensional (1D) Fibonacci quasi-periodic structure which is composed of superconductor and isotropic dielectric have been theoretically investigated by the transfer matrix method (TMM). From the numerical results, it has been shown that this OBG is insensitive to the incident angle and the polarization of electromagnetic wave (EM wave), and the frequency range and central frequency of OBG cease to change with increasing Fibonacci order, but vary with the ambient temperature of system, the thickness of the superconductor, and dielectric layer, respectively. The bandwidth of OBG can be notably enlarged with increasing the superconductor thickness. Moreover, the frequency range of OBG can be narrowed with increasing the thickness of dielectric layer and ambient temperature. The damping coe-cient of superconductor layers has no efiect on the frequency range of OBG under low- temperature conditions. It is shown that Fibonacci quasi-periodic 1D superconductor dielectric photonic crystals (SDPCs) have a superior feature in the enhancement frequency range of OBG. This kind of OBG has potential applications in fllters, microcavities, and flbers, etc.