title: Cylinder light concentrator and absorber: theoretical description.
abstract: We present a detailed theoretical description of a broadband omnidirectional light concentrator and absorber with cylinder geometry. The proposed optical "trap" captures nearly all the incident light within its geometric cross-section, leading to a broad range of possible applications--from solar energy harvesting to thermal light emitters and optoelectronic components. We have demonstrated that an approximate lamellar black-hole with a moderate number of homogeneous layers, while giving the desired ray-optical performance, can provide absorption efficiencies comparable to those of ideal devices with a smooth gradient in index.
authors: Birck Nanotechnology Center, School of Electrical Engineering, Purdue University, West Lafayette, IN 47903 USA. kildishev@purdue.edu
authors: Alexander V
authors: AV
authors: Kildishev
authors: Ludmila J
authors: LJ
authors: Prokopeva
authors: Evgenii E
authors: EE
authors: Narimanov
mesh_terms: D017076:Computer-Aided Design; D011211:Electric Power Supplies; D004867:Equipment Design; D008027:Light; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D012993:Solar Energy