A design of nano‐optical Yagi‐Uda antenna with high forward directivity. Issue 4 (April 2017)

• Record Type: Journal Article
• Authors: Chen, Xiaolin; Yu, Wenhai; Yue, Wencheng; Yao, Peijun; Liu, Wen
• Is Part Of: Microwave and optical technology letters. Volume 59:Issue 4(2017:Apr.)
• Page Start: 786
• Page End: 789
• Publication Date: 2017-04
• Subjects: optical Yagi‐Uda antenna -- high forward directivity -- metallic nanoparticles -- radiation efficiency -- dyadic Green's function; Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.30399
• Languages: English
• ISSNs: 0895-2477

Abstract

ABSTRACT: Optical antennas, acting as converters between propagating and localized fields, can be employed in near‐field microscopy and high‐resolution biomedical sensors. Utilizing the multi‐sphere dyadic Green's function, we propose a nonperiodic optical nanoantenna made of a metallic nanoparticles dimer chain. Our numeric results show that the antenna has a high forward directivity and vanishing backward directivity simultaneously even without a reflector. Our work reveals the role of nonperiodicity in design of optical Yagi‐Uda nanoantenna. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:786–789, 2017