Study of Design Tunable Optical Sensor and Monochromatic Filter of the One-Dimensional Periodic Structure of TiO2/MgF2 with Defect Layer of Liquid Crystal (LC) Sandwiched with Two Silver Layers

• Published in: Plasmonics (Norwell, Mass.) Vol. 15; no. 6; pp. 1845 - 1854
• Main Authors: Singh, Pawan, Thapa, Khem B., Singh, Sudesh K., Gupta, Alok K.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-12-2020; Springer Nature B.V
• Subjects: Biochemistry; Biological and Medical Physics; Biophysics; Biotechnology; Chemistry; Chemistry and Materials Science; Crystal defects; Crystal structure; Dielectrics; Liquid crystals; Magnesium fluorides; Nanotechnology; Optical measuring instruments; Optical properties; Periodic structures; Silver; Titanium dioxide; Transfer matrices; Transfer matrix method (TMM); Surface plasmon resonance; Liquid crystal; Silver (Ag); Optical properties
• ISSN: 1557-1955; 1557-1963
• DOI: 10.1007/s11468-020-01210-x

In this paper, we have inspected the optical characteristics of one-dimensional periodic structure (1DPS) of TiO
2
and MgF
2
dielectric materials with defect layer of liquid crystal (LC) sandwiched with two silver layers, i.e., (TiO
2
|MgF
2
)
3
|Ag|LC|Ag|(TiO
2
/MgF
2
)
3
using transfer matrix method (TMM). The optical tunable properties of considered periodic structures investigated at different incident angles and temperatures for TE and TM modes. Our study shows that absorption peak of 1DPS varies with incident angle and temperature. The defect layer (Ag-LC-Ag), sandwiched LC within two metallic (Ag) layers, exhibits the surface plasmon waves at the metal LC interfaces. The effect of surface plasmon waves can be better understand through the optical sensing property of such defect periodic structure. The detailed study concludes that such a type of one-dimensional periodic structure (1DPS) may be useful to design a tunable sensor and monochromatic filter.