title: High-sensitivity molecular sensing using hollow-core photonic crystal fiber and surface-enhanced Raman scattering.
abstract: A high-sensitivity molecular sensor using a hollow-core photonic crystal fiber (HCPCF) based on surface-enhanced Raman scattering (SERS) has been experimentally demonstrated and theoretically analyzed. A factor of 100 in sensitivity enhancement is shown in comparison to direct sampling under the same conditions. With a silver nanoparticle colloid as the SERS substrate and Rhodamine 6G as a test molecule, the lowest detectable concentration is 10(-10) M with a liquid-core photonic crystal fiber (LCPCF) probe, and 10(-8) M for direct sampling. The high sensitivity provided by the LCPCF SERS probe is promising for molecular detection in various sensing applications.
authors.affiliation: Department of Electrical Engineering, University of California at Santa Cruz, Santa Cruz, California 95064, USA.
authors.forename: Xuan
authors.initials: X
authors.lastname: Yang
authors.forename: Chao
authors.initials: C
authors.lastname: Shi
authors.forename: Damon
authors.initials: D
authors.lastname: Wheeler
authors.forename: Rebecca
authors.initials: R
authors.lastname: Newhouse
authors.forename: Bin
authors.initials: B
authors.lastname: Chen
authors.forename: Jin Z
authors.initials: JZ
authors.lastname: Zhang
authors.forename: Claire
authors.initials: C
authors.lastname: Gu