Chiro-optical response in helically arranged achiral dielectric nanoparticles. Issue 10 (28th February 2018)

• Record Type: Journal Article
• Authors: Singh, Haobijam Johnson; Ghosh, Ambarish
• Is Part Of: Journal of materials chemistry. Volume 6:Issue 10(2018)
• Page Start: 2430
• Page End: 2434
• Publication Date: 2018-02-28
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c8tc00085a
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Helically arranged dielectric resonators (amorphous silicon) and their chiro-optical response in single and collective resonance modes. Abstract : We demonstrate experimentally how achiral dielectric nanoparticles when arranged in a chiral geometry can exhibit chiro-optical activity. Such a response originates in the dynamic electromagnetic interactions between the resonant modes of the individual nanoparticles, as confirmed by numerical simulations. When such nanoparticles are extended into an infinite periodic array, additional chiro-optical bands were induced at the lattice/collective modes of the nanoparticle system which have been experimentally observed. Our fabrication method is wafer scale and the material platform is low loss and CMOS-compatible, which together can allow a seamless integration of this novel material system into existing optoelectronic technologies.