title: Enhancing extraction of light from metal composite structures for plasmonic emitters using light-coupling effect.
abstract: This work demonstrates the efficiency and directionality of a method of extracting light from thin-film emissive devices by near-field evanescent waves in plasmonic emitters used in metal composite grating structures. A near-field evanescent wave can induce a surface plasmon wave on the surface of a metal under resonant conditions. Enhancing the near-field evanescent wave generates strong far-field nonlinear optical effects. This effect is highly efficient in some plasmonic emitter structures. Theoretical and experimental results demonstrate that such a metal composite grating structure exhibits good performance, a high coupling ratio, a small coupling angle, enhanced light extraction and a small FWHM. It also improves luminous efficiency, emitter angle, and directivity.
authors.forename: Nan-Fu
authors.initials: NF
authors.lastname: Chiu
authors.forename: Cheng-Du
authors.initials: CD
authors.lastname: Yang
authors.forename: Yi-Lun
authors.initials: YL
authors.lastname: Kao
authors.forename: Kuan-Lin
authors.initials: KL
authors.lastname: Lu