RUM2021 RUM2021-EuroCentral CST Studio Suite
Abstract:
We propose a light trapping structure whose reciprocal space is tailored to achieve wavelength and direction dependent scattering. Fourier space contains belts of Bragg peaks with central symmetry which would allow us to trap the normally incident light at much lower refractive index contrast. Bragg condition in Fourier space would be fulfilled when Ewald sphere would fully overlap the function in Fourier space to scatter incident light in different direction. The graded structure in real space would be binarised by using level cut method to get two materials with equal ratio. A small loss is introduced inside the material slab to absorb the scattered waves to efficiently trap the incident light. We could verify the efficient trapping of incident light in transient solver of CST at designed wavelength for the refractive index contrast of 1.06. The structure would be then printed and tested at microwave frequencies which are more suitable for applications such as, suppression of unwanted frequencies and transparent frequency and direction selective detectors.
Speaker Info:
Meraj E Mustafa did his B.Sc. in electrical Engineering from University of Engineering and Technology Lahore (2010-2014). He received his M.Sc. degree in Electrical Engineering with majors in RF & Microwave form National University of Sciences and Technology, Islamabad, Pakistan in April 2019. During his internship in 2017 in NUST Islamabad, he got hands on experience of Vector Network Analyzer (VNA) and Spectrum Analyzer. His specialization is in RF & Microwave, Optics and Electromagnetics. Currently, he is pursuing my PhD from Institute of Optical and Electronic Materials, Hamburg University of Technology, Germany. My dissertation topics is “Light propagation in quasiperiodic structures”.
