Chiroptically Active Metallic Nanohelices with Helical Anisotropy. Issue 43 (27th September 2017)

• Record Type: Journal Article
• Authors: Huang, Zhifeng; Liu, Junjun
• Is Part Of: Small. Volume 13:Issue 43(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-09-27
• Subjects: chiroptical activity -- circular dichroism -- chiral nanoplasmonics -- helical anisotropy -- metallic nanohelices; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201701883
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: Manipulation of circular polarization states of light in the ultraviolet‐visible‐near infrared range, which cannot be operated using natural materials, is of fundamental interest derived from a wide range of chirality‐associated optical, chemical and biological applications. To achieve this objective, chiral metamaterials made of metallic nanohelices (NHs) have been artificially designed and generated. The circular polarization manipulation is as a result of helical anisotropy and localized surface plasmon resonance of metallic NHs, and engineering helical structures and metallic composition gives rise to flexible tailoring of the circular polarization manipulation. Herein, we review the latest development of metallic NHs in terms of fabrication, fundamentally optical and magnetic properties, and chiroptical applications, followed by envisioning prospective applications closely related to molecular chirality. We strongly believe that the helicity‐induced anisotropy of metallic NHs will provide us a wide range of opportunities to tackle some prominent problems and challenges intrinsically associated with the natural homochirality. Abstract : Metallic nanohelices, combining helical anisotropy and nanoplasmonics, exhibit unique chiroptical and magnetochiral activity, leading to diverse chiroptical applications of light manipulation, molecular sensing, nanorheological measurement and remote‐control propulsion. Metallic nanohelices will provide us a wide range of opportunities to tackle some prominent problems and challenges intrinsically associated with the natural homochirality, and are reviewed here.