Tunable Sensing Property of 1D Periodic Structure with Defect of Liquid Crystal Sandwiched by Metallic Layers

2019 ◽  
Vol 17 (10) ◽  
pp. 800-803
Author(s):  
Pawan Singh ◽  
Krishan Pal ◽  
Narinder Kumar ◽  
Sudesh K. Singh ◽  
Khem B. Thapa ◽  
...  
Keyword(s):  
Optical Properties ◽  
Electromagnetic Wave ◽  
Liquid Crystal ◽  
Periodic Structure ◽  
Transfer Matrix Method ◽  
Incident Angle ◽  
Dielectric Materials ◽  
Absorption Properties ◽  
One Dimensional ◽  
Absorption Defect

In this paper, we have investigated the optical properties of one-dimensional periodic structure of dielectric materials with defect of liquid crystal (LC) sandwiched with two silver (Ag) layers. The transmission, reflection and absorption properties of considered periodic structure have calculated theoretically using transfer matrix method (TMM). Our study reports that the tunability of absorption defect peak of the defect periodic structure is achieved by the variation in the incident angle of electromagnetic wave. The obtained result suggests that such defect periodic structure may be used as tunable sensor and filter devices.

ELECTROMAGNETIC WAVE PROPAGATION CHARACTERISTICS IN A ONE-DIMENSIONAL METALLIC PHOTONIC CRYSTAL

2008 ◽  
Vol 17 (03) ◽  
pp. 255-264 ◽  
Author(s):  
ARAFA H. ALY ◽  
SANG-WAN RYU ◽  
CHIEN-JANG WU
Keyword(s):  
Wave Propagation ◽  
Electromagnetic Wave ◽  
Photonic Crystal ◽  
Transfer Matrix Method ◽  
Electromagnetic Wave Propagation ◽  
Plasma Frequency ◽  
Dielectric Materials ◽  
Propagation Characteristics ◽  
One Dimensional ◽  
Metallic Photonic Crystal

We theoretically studied electromagnetic wave propagation in a one-dimensional metal/dielectric photonic crystal (1D MDPC) consisting of alternating metallic and dielectric materials by using the transfer matrix method. We performed numerical analyses to investigate the propagation characteristics of a 1D MDPC. We discuss the details of the calculated results in terms of the electron density, the thickness of the metallic layer, different kinds of metals, and the plasma frequency.

Tunable optical filter based on one-dimensional periodic structure composed of SiO2 and anisotropic metamaterial (AMM) with a liquid crystal defect layer sandwiched by two SiO2

2019 ◽  
Vol 33 (18) ◽  
pp. 1950194 ◽  
Author(s):  
Pawan Singh ◽  
Khem B. Thapa ◽  
Narinder Kumar ◽  
Anil K. Yadav ◽  
Devesh Kumar
Keyword(s):  
Liquid Crystal ◽  
Periodic Structure ◽  
Incident Angle ◽  
Optical Filter ◽  
Defect Layer ◽  
Transmission Property ◽  
One Dimensional ◽  
Transmission Properties ◽  
Tunable Optical Filter ◽  
Anisotropic Metamaterial

This paper reports the tunable transmission properties of asymmetric one-dimensional periodic structure (1DPS) composed of SiO2 and anisotropic metamaterial (AMM) layers with defect of liquid crystal (LC) sandwiched by two SiO2 layers, i.e., (SiO[Formula: see text]AMM)[Formula: see text]SiO[Formula: see text]LC[Formula: see text]SiO[Formula: see text](SiO[Formula: see text]AMM)3 using the transfer matrix method (TMM). We have studied the optical properties of the periodic structure (SiO[Formula: see text]AMM)3 [Formula: see text]SiO[Formula: see text]LC[Formula: see text]SiO[Formula: see text](SiO[Formula: see text]AMM)3 with a different incident angle of the electromagnetic wave for particular director angle of LC molecules. The tunability of the transmission property of the considered 1DPS shows that the transmittance depends upon the orientation of LC molecules. Such an asymmetric periodic structure (1DPS) composed of SiO2 and AMM with a defect of LC sandwiched by two SiO2 layers, (SiO2 [Formula: see text]AMM)[Formula: see text]SiO[Formula: see text]LC[Formula: see text]SiO[Formula: see text](SiO[Formula: see text]AMM)3, may be used as a tunable optical filter and bi-stable device.

Electro-Tunable Defect Mode in One-Dimensional Periodic Structure Containing Nematic Liquid Crystal as a Defect Layer

2002 ◽  
Vol 41 (Part 2, No. 12B) ◽  
pp. L1482-L1484 ◽  
Author(s):  
Ryotaro Ozaki ◽  
Tatsunosuke Matsui ◽  
Masanori Ozaki ◽  
Katsumi Yoshino
Keyword(s):  
Liquid Crystal ◽  
Periodic Structure ◽  
Nematic Liquid Crystal ◽  
Defect Mode ◽  
Defect Layer ◽  
One Dimensional

Optical properties of one-dimensional defective photonic crystal containing nanocomposite material

2017 ◽  
Vol 26 (01) ◽  
pp. 1750007 ◽  
Author(s):  
Arafa H. Aly ◽  
Hussein A. Elsayed ◽  
Christina Malek
Keyword(s):  
Optical Properties ◽  
Photonic Crystal ◽  
Photonic Crystals ◽  
Volume Fraction ◽  
Dielectric Materials ◽  
Defect Layer ◽  
Nanocomposite Materials ◽  
One Dimensional ◽  
Plasmon Frequency ◽  
Metal Thickness

We have obtained the optical properties of one-dimensional defective photonic crystals containing nanocomposite materials of Ag as a defect layer in UV region; the permittivity of nanocomposite materials depends on plasmon frequency of metal nanoparticles. Our analysis is based on the fundamentals of the transfer matrix method. We have investigated the effect of many parameters such as metal thickness, volume fraction, and defected dielectric materials on the intensity of a defect layer.

Electromagnetic density of modes in one-dimensional photonic crystals containing dispersive metamaterials

2018 ◽  
Vol 96 (11) ◽  
pp. 1224-1229
Author(s):  
Y. Sharma ◽  
S. Shukla ◽  
A. Aman ◽  
S. Prasad ◽  
V. Singh
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Transfer Matrix Method ◽  
Incident Angle ◽  
Structural Parameters ◽  
Angle Of Incidence ◽  
Relative Thickness ◽  
One Dimensional ◽  
Unit Cells ◽  
Frequency Regime

The electromagnetic density of modes (DOM) in a finite one-dimensional photonic crystal containing dispersive metamaterials is computed using Wigner’s time approach. The expression of DOM is derived using the transfer matrix method. Different structural parameters, such as relative thickness, incident angle, and total number of unit cells are varied and their effects are investigated. It is observed that relative thickness, angle of incidence, and total number of unit cells all play an important role in determining the properties of DOM depending on the frequency regime under consideration.

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