title: UV waveguides light fabricated in fluoropolymer CYTOP by femtosecond laser direct writing.
abstract: We have fabricated optical waveguides inside the UV-transparent polymer, CYTOP, by femtosecond laser direct writing for propagating UV light in biochip applications. Femtosecond laser irradiation is estimated to increase the refractive index of CYTOP by 1.7 x 10(-3) due to partial bond breaking in CYTOP. The waveguide in CYTOP has propagation losses of 0.49, 0.77, and 0.91 dB/cm at wavelengths of 632.8, 355, and 266 nm, respectively.
authors.affiliation: RIKEN-Advanced Science Institute, Wako, Saitama, Japan. y-hanada@riken.jp
authors.forename: Yasutaka
authors.initials: Y
authors.lastname: Hanada
authors.forename: Koji
authors.initials: K
authors.lastname: Sugioka
authors.forename: Katsumi
authors.initials: K
authors.lastname: Midorikawa
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005461:Fluorine / Q000737:chemistry* / Q000528:radiation effects*; D007834:Lasers; D011108:Polymers / Q000737:chemistry* / Q000528:radiation effects*; D012031:Refractometry / Q000295:instrumentation*; D014159:Transducers; D014466:Ultraviolet Rays
chemical_list: D011108:Polymers; D005461:Fluorine