Flat collimating lenses based on quasi-conformal transformation electromagnetics

This paper demonstrates two collimating lenses designed using the quasi-conformal transformation optics (TO) technique to radiate multiple directive beams when fed by a simple embedded line source. Using the Finite-Difference Time-Domain (FDTD) method, we perform full-wave numerical simulations to d...

Full description

Saved in:
Bibliographic Details
Main Authors: Qi Wu, Turpin, J. P., Werner, D. H., Werner, P. L., Wenxuan Tang, Yang Hao
Format: Conference Proceeding
Language:English
Subjects:
Coatings
collimating lens
Collimators
directive emission
gradient index materials
Lenses
Materials
Optical reflection
quasi-conformal mapping
Surface waves
transformation electromagnetics
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper demonstrates two collimating lenses designed using the quasi-conformal transformation optics (TO) technique to radiate multiple directive beams when fed by a simple embedded line source. Using the Finite-Difference Time-Domain (FDTD) method, we perform full-wave numerical simulations to demonstrate their optical performance. Well-collimated beams can be visualized in the near-field region of the TO devices with a corresponding directive radiation pattern demonstrated in the far-field. Thin anti-reflection coatings can be employed to enhance the directivity by reducing reflections at the lens surfaces. These designs only require spatially-varying dielectric materials with no magnetic properties, facilitating low-loss, broadband operation in both the microwave and optical regimes.
ISSN:2164-3342
DOI:10.1109/EuCAP.2012.6206590