title: Large-area, near-infrared (IR) photonic crystals with colloidal gold nanoparticles embedding.
abstract: A polymeric composite material composed of colloidal gold nanoparticles (<10 nm) and SU8 has been utilized for the fabrication of large-area, high-definition photonic crystal. We have successfully fabricated near-infrared photonic crystal slabs from composite materials using a combination of multiple beam interference lithography and reactive ion etching processes. Doping of colloidal gold nanoparticles into the SU8 photopolymer results in a better definition of structural features and hence in the enhancement of the optical properties of the fabricated photonic crystals. A 2D air hole array of triangular symmetry with a hole-to-hole pitch of approximately 500 nm has been successfully fabricated in a large circular area of 1 cm diameter. Resonant features observed in reflectance spectra of our slabs are found to depend on the exposure time, and can be tuned over a range of near-infrared frequencies.
authors.affiliation: Department of Electrical Engineering, State University of New York, Buffalo, NY 14260, USA.
authors.forename: Shobha
authors.initials: S
authors.lastname: Shukla
authors.forename: Alexander
authors.initials: A
authors.lastname: Baev
authors.forename: Hongsub
authors.initials: H
authors.lastname: Jee
authors.forename: Rui
authors.initials: R
authors.lastname: Hu
authors.forename: Ryszard
authors.initials: R
authors.lastname: Burzynski
authors.forename: Yong-Kyu
authors.initials: YK
authors.lastname: Yoon
authors.forename: Paras N
authors.initials: PN
authors.lastname: Prasad
mesh_terms: D003102:Colloids / Q000737:chemistry; D003460:Crystallization; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D008670:Metals / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods*; D055095:Optics and Photonics; D017785:Photons; D019265:Spectroscopy, Near-Infrared / Q000379:methods
chemical_list: D003102:Colloids; D008670:Metals; D006046:Gold