Analysis of transmission and reflection spectra of three-dimensional photonic crystals

2005 ◽  
Author(s):  
S. Linden ◽  
M. Deubel ◽  
M. Wegener
Keyword(s):  
Photonic Crystals ◽  
Three Dimensional ◽  
Reflection Spectra ◽  
Transmission And Reflection Spectra ◽  
Transmission And Reflection

Two Dimensional Photonic Crystal Modes and Resonances in Three-dimensional Structures

2001 ◽  
Vol 694 ◽  
Author(s):  
Shanhui Fan ◽  
J. D. Joannopoulos
Keyword(s):  
Spectral Properties ◽  
Three Dimensional ◽  
Reflection Spectra ◽  
Two Dimensional ◽  
Quality Factors ◽  
Transmission And Reflection Spectra ◽  
General Physical ◽  
Two Dimensional Photonic Crystal ◽  
Index Modulation ◽  
Transmission And Reflection

AbstractWe present three-dimensional analysis of two-dimensional guided resonances in photonic crystalslab structures. This analysis leads to a new understanding of the complex spectral properties of such systems. Specifically, we calculate the dispersion diagrams, the modal patterns, and transmission and reflection spectra of these resonances. From these calculations, a key observation emerges involving the presence of two temporal pathways for transmission and eflection processes. Using this insight, we introduce a general physical model that explains the essential features of complex spectral properties. Finally, we show that the quality factors of these resonances are strongly influenced by the symmetry of the modes, and the strength ofthe index modulation.

scholarly journals Windows-based computational algorithms for 1D MPC and thin-film analysis

2020 ◽  
Author(s):  
Mohammad Nur E Alam ◽  
Mikhail Vasiliev
Keyword(s):  
Photonic Crystals ◽  
Research Area ◽  
Computational Algorithms ◽  
Software Application ◽  
Design And Optimization ◽  
Thin Film Analysis ◽  
Custom Software ◽  
Transmission And Reflection Spectra ◽  
Transmission And Reflection ◽  
Magnetic Photonic Crystals

The development of magnetic photonic crystals (MPC) has been a rapidly evolving research area since the late 1990s. Magneto-optic (MO) materials and the techniques for their characterization have also continually undergone functional and property-related improvements. MPC Optimization is a feature-rich Windows software application designed to enable researchers to analyse the optical and magneto-optical spectral properties of multilayers containing gyrotropic constituents. A set of computational approaches, and a custom software package have been described, designed to enable the design and optimization of 1D magnetic photonic crystals in terms of the achievable combinations of Faraday rotation, transmission, and reflection spectra. 

scholarly journals Pulsed Laser Annealing Effect on Optical and Structural Properties of ZnS/ZnSe Heterostructures

2019 ◽  
Vol 6 (1) ◽  
pp. 23-29
Author(s):  
Haidar Howari
Keyword(s):  
Thin Films ◽  
Absorption Coefficient ◽  
Laser Annealing ◽  
Pulsed Laser ◽  
Annealing Process ◽  
Reflection Spectra ◽  
Pulsed Laser Annealing ◽  
Before And After ◽  
Transmission And Reflection Spectra ◽  
Transmission And Reflection

Studies of pulsed laser annealing (PLA) on semiconductor thin films were performed to examine changes of the optical and structural parameters due to the laser heat. Thin films of ZnS/ZnSe were deposited on quartz substrates at a pressure of 8.2*10-6 mbar using PVD technique. These thin films were annealed at different laser powers using CO2 pulsed laser. Transmission and reflection spectra were recorded before and after the annealing process. A decrease in the transmission and reflection spectra after annealing is observed. The absorption coefficient, refractive index, damping coefficient and dielectric constant were calculated before and after the annealing process. Changes in the optical parameters are found after the annealing process. The energy band gaps of ZnS and ZnSe have been determined. Upon annealing, an increase in the absorption coefficient is observed which is due to an improvement in the granular nanostructure of the ZnS/ZnSe thin films. XRD patterns of the prepared samples were obtained before and after the annealing procedure and revealed an enhancement in the crystallite structure upon annealing.

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