Paper Info
Title
The Magic Of Optics-An Overview Of Recent Advanced Terahertz Diffractive Optical Elements
Abstract
Diffractive optical elements are well known for being not only flat but also lightweight, and are characterised by low attenuation. In different spectral ranges, they provide better efficiency than commonly used refractive lenses. An overview of the recently invented terahertz optical structures based on diffraction design is presented. The basic concepts of structure design together with various functioning of such elements are described. The methods for structure optimization are analysed and the new approach of using neural network is shown. The paper illustrates the variety of structures created by diffractive design and highlights optimization methods. Each structure has a particular complex transmittance that corresponds to the designed phase map. This precise control over the incident radiation phase changes is limited to the design wavelength. However, there are many ways to overcome this inconvenience allowing for broadband functioning.
Year
DOI
Venue
2021
10.3390/s21010100
SENSORS
Keywords
DocType
Volume
diffractive optical elements, terahertz optics, beam shaping, 3D printing, convolution approach, on-axis and off-axis regime, neural-network-based optimization
Journal
21
Issue
ISSN
Citations 
1
1424-8220
0
PageRank 
References 
Authors
0.34
0
1
Name
Order
Citations
PageRank
Agnieszka M. Siemion100.68