Date:

2025-04-30

Title of Paper:

All-dielectric three-dimensional broadband Eaton lens with large refractive index range

Journal:

Applied physics letters

Summary:

We proposed a method to realize three-dimensional (3D) gradient index (GRIN) devices requiring large refractive index (RI) range with broadband performance. By combining non-resonant GRIN woodpile photonic crystals (PC) structure in the metmaterial regime with a compound liquid medium, a wide RI range (1~6.32) was fulfilled flexibly. As a proof-of-principle for the low-loss and non-dispersive method, a 3D Eaton lens was designed and fabricated based on 3D printing process. Full-wave simulation and experiment validated its omnidirectional wave bending effects in a broad bandwidth covering Ku band (12 GHz~18 GHz).

Co-author:

Ming Yin, Xiao Yong Tian (corr au) et al

Volume:

104

Page Number:

094101

Translation or Not:

No

Date of Publication:

2014-02-22