title: Investigation on spectral loss characteristics of subwavelength terahertz fibers.
abstract: By measuring the spectral loss characteristics of subwavelength-diameter terahertz fibers, our study supports the recent theory proposed by M. Sumetsky [Opt. Lett. 31, 870 (2006)] that diameter-variation-induced radiation is a dominant loss mechanism for subwavelength fibers in the low- (<1%) core-fraction-power regime. This physical mechanism limits the lowest guidable frequency in a subwavelength fiber.
authors.affiliation: Department of Electrical Engineering and Graduate Institute of Electro-Optical Engineering, National Taiwan University, Taiwan.
authors.forename: Hung-Wen
authors.initials: HW
authors.lastname: Chen
authors.forename: Yu-Tai
authors.initials: YT
authors.lastname: Li
authors.forename: Ci-Ling
authors.initials: CL
authors.lastname: Pan
authors.forename: Jeng-Liang
authors.initials: JL
authors.lastname: Kuo
authors.forename: Ja-Yu
authors.initials: JY
authors.lastname: Lu
authors.forename: Li-Jin
authors.initials: LJ
authors.lastname: Chen
authors.forename: Chi-Kuang
authors.initials: CK
authors.lastname: Sun