Properties of defect modes in geometrically chirped one-dimensional photonic crystals

Renilkumar, M.; Nair, Pradeep R.

doi:10.1016/j.optmat.2011.01.008

Cited by 11 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is worthnoting that the synthetic dielectric can be realized by the dielectric resonator with a refractive index of close to 6, and the proposed GMPCs including the air layer can be fabricated by the wet anisotropic etching technique in the practical experiment [23,24]. Because our research is a theoretical proposal, the specific production process is not stated here.…”

Section: Simulation Model and Formulationmentioning

confidence: 99%

Ultra-wide unidirectional infrared absorber based on 1D gyromagnetic photonic crystals concatenated with general Fibonacci quasi-periodic structure in transverse magnetization

Guo

Zhang

2020

J. Opt.

View full text Add to dashboard Cite

In this paper, an ultra-wide multiband unidirectional absorber based on 1D gyromagnetic magnetized photonic crystals (GMPCs) comprising ferrite material and isotropic dielectrics is investigated under transverse magnetization for transverse electric mode within the infrared regime by the transfer matrix method. Due to the Voigt magneto-optical effect, the magnetically modulated absorber possesses multiple preeminent one-way absorption bands, which run at 12.24–18.80, 25.25–50.05, 51.13–74.90 and 76.67–93.88 THz and in the reverse propagating direction. The absorber displays a splendid reflection phenomenon. These perfect nonreciprocal results can be ascribed to the destruction of the space-time reversal symmetry on account of the anisotropic gyromagnetic ferrite material and quasi-periodic arrangement of the proposed GMPCs. The comparisons of the absorption capacity among the general Fibonacci sequence, the periodic sequence and Thue–Morse sequence are discussed, and the general Fibonacci sequence has its superiority in the expansion of the one-way absorption bandwidth due to its better self-similarity. Besides, the regulative effects of the magnetic field intensity, damping factor and thicknesses of materials on the one-way absorption features are analyzed specifically. This research provides a promising design approach to the tunable infrared optical isolator, waveguide and circulator through the magnetized materials.

show abstract

Section: Simulation Model and Formulationmentioning

confidence: 99%

Ultra-wide unidirectional infrared absorber based on 1D gyromagnetic photonic crystals concatenated with general Fibonacci quasi-periodic structure in transverse magnetization

Guo

Zhang

2020

J. Opt.

View full text Add to dashboard Cite

show abstract

“…The structure can be further manipulated by breaking the periodicity with a defect to produce singular or multiple transmission modes within the forbidden region [3]. Over the years various studies on the dynamics of the transmission modes [4][5][6] within the band gap have been exploited to give way to several tunable optoelectronic applications [7][8][9][10][11]. External factors such as temperature, pressure and strain affect the mechanical and material properties of the layers constituting the PC and enable the tuning of the PBG [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Thermal and Layer Thickness Dependence of Defect and Band Edge Transmissions in 1D PCs Based on ZnS/CaF₂ Multilayers

Shilpa

Abhinaya

Yamuna

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

Alternating layers of different materials with sub wavelength thickness in one dimension are used for controlling the propagation of electromagnetic waves owing to their ability to selectively transfer and confine photons of specific wavelengths, called photonic band gap (PBG). Temperature independent large PBG in the visible wavelength range is highly desired for many applications and we have theoretically investigated the thermal and layer thickness dependence on PBG and proposed a novel strategy to choose materials based on their coefficients of thermal expansion and thermo optic effect. The thermal dependence of PBG can be eliminated by making the spectral shift due to thermo optic effect equal and opposite to that of the thermal expansion effect. We have chosen ZnS/CaF2 multilayers for the design of 1D photonic crystal (PC) and our calculations have shown that the spectral shift due to thermal fluctuations could be significantly reduced by the negative thermo optic coefficient of these materials compensated by the positive thermal expansion coefficient. The proposed 1D PC shows a temperature dependent spectral shift of ∼14 pm/oC in the visible range.

show abstract

Tunable omnidirectional band gap properties of 1D plasma annular periodic multilayer structure based on an improved Fibonacci topological structure

et al. 2021

View full text Add to dashboard Cite

In this paper, the characteristics of the omnidirectional band gap (OBG) for one-dimensional (1D) plasma cylindrical photonic crystals (PCPCs) are based on an improved Fibonacci topological (IFT) structure are studied. The influences of the azimuthal mode number, incident angle, plasma thickness, and plasma frequency on the OBG are discussed. It is concluded that increasing the azimuth modulus can significantly expand the bandwidth of the OBG, and the OBG can be moved to the low-frequency direction by increasing the plasma frequency. In addition, an interesting phenomenon can be found that when the number of azimuthal modes is equal to 2, the TM wave can produce an extra high reflection zone. It provides a theoretical support for designing the narrowband filters without introducing any physical defect layers in the structure.

show abstract

Properties of defect modes in geometrically chirped one-dimensional photonic crystals

Cited by 11 publications

References 14 publications

Ultra-wide unidirectional infrared absorber based on 1D gyromagnetic photonic crystals concatenated with general Fibonacci quasi-periodic structure in transverse magnetization

Ultra-wide unidirectional infrared absorber based on 1D gyromagnetic photonic crystals concatenated with general Fibonacci quasi-periodic structure in transverse magnetization

Thermal and Layer Thickness Dependence of Defect and Band Edge Transmissions in 1D PCs Based on ZnS/CaF₂ Multilayers

Tunable omnidirectional band gap properties of 1D plasma annular periodic multilayer structure based on an improved Fibonacci topological structure

Contact Info

Product

Resources

About

Properties of defect modes in geometrically chirped one-dimensional photonic crystals

Cited by 11 publications

References 14 publications

Ultra-wide unidirectional infrared absorber based on 1D gyromagnetic photonic crystals concatenated with general Fibonacci quasi-periodic structure in transverse magnetization

Ultra-wide unidirectional infrared absorber based on 1D gyromagnetic photonic crystals concatenated with general Fibonacci quasi-periodic structure in transverse magnetization

Thermal and Layer Thickness Dependence of Defect and Band Edge Transmissions in 1D PCs Based on ZnS/CaF2 Multilayers

Tunable omnidirectional band gap properties of 1D plasma annular periodic multilayer structure based on an improved Fibonacci topological structure

Contact Info

Product

Resources

About

Thermal and Layer Thickness Dependence of Defect and Band Edge Transmissions in 1D PCs Based on ZnS/CaF₂ Multilayers