title: Biomimetic subwavelength antireflective gratings on GaAs.
abstract: We have developed a simple and scalable bottom-up approach for fabricating moth-eye antireflective coatings on GaAs substrates. Monolayer, non-close-packed silica colloidal crystals are created on crystalline GaAs wafers by a spin-coating-based single-layer reduction technique. These colloidal monolayers can be used as etching masks during a BCl(3) dry-etch process to generate subwavelength-structured antireflective gratings directly on GaAs substrates. The gratings exhibit excellent broadband antireflective properties, and the specular reflection matches with the theoretical prediction using a rigorous coupled-wave analysis model. These bioinspired antireflection coatings have important technological applications ranging from efficient solar cells to IR detectors.
authors.affiliation: Department of Chemical Engineering, University of Florida, Gainesville, FL 32611, USA.
authors.forename: Chih-Hung
authors.initials: CH
authors.lastname: Sun
authors.forename: Brian J
authors.initials: BJ
authors.lastname: Ho
authors.forename: Bin
authors.initials: B
authors.lastname: Jiang
authors.forename: Peng
authors.initials: P
authors.lastname: Jiang
mesh_terms: D000818:Animals; D001152:Arsenicals / Q000737:chemistry*; D040761:Biomimetic Materials / Q000737:chemistry*; D032701:Biomimetics / Q000295:instrumentation* / Q000379:methods; D003315:Cornea / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005708:Gallium / Q000737:chemistry*; D008027:Light; D009036:Moths / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation* / Q000379:methods; D012542:Scattering, Radiation
chemical_list: D001152:Arsenicals; C043055:gallium arsenide; D005708:Gallium