title: Fabrication of artificially stacked ultrathin ZnS/MgF2 multilayer dielectric optical filters.
abstract: We report a design and fabrication strategy for creating an artificially stacked multilayered optical filters using a thermal evaporation technique. We have selectively chosen a zinc sulphide (ZnS) lattice for the high refractive index (n = 2.35) layer and a magnesium fluoride (MgF2) lattice as the low refractive index (n = 1.38) layer. Furthermore, the microstructures of the ZnS/MgF2 multilayer films are also investigated through TEM and HRTEM imaging. The fabricated filters consist of high and low refractive 7 and 13 alternating layers, which exhibit a reflectance of 89.60% and 99%, respectively. The optical microcavity achieved an average transmittance of 85.13% within the visible range. The obtained results suggest that these filters could be an exceptional choice for next-generation antireflection coatings, high-reflection mirrors, and polarized interference filters.
authors.affiliation: Department of Physics, University of Rajasthan, Jaipur 302055, India. kedawat08@gmail.com
authors.forename: Garima
authors.initials: G
authors.lastname: Kedawat
authors.forename: Subodh
authors.initials: S
authors.lastname: Srivastava
authors.forename: Vipin Kumar
authors.initials: VK
authors.lastname: Jain
authors.forename: Pawan
authors.initials: P
authors.lastname: Kumar
authors.forename: Vanjula
authors.initials: V
authors.lastname: Kataria
authors.forename: Yogyata
authors.initials: Y
authors.lastname: Agrawal
authors.forename: Bipin Kumar
authors.initials: BK
authors.lastname: Gupta
authors.forename: Yogesh K
authors.initials: YK
authors.lastname: Vijay