Abstract
Absorption spectroscopy represents one highly relevant approach in current analytics to non-invasively characterize liquid analytes. Here we present the concept of waveguide-integrated absorption spectroscopy via nanobore optical fibers. Using a liquid-filled nanochannel inside the core of a microstructured step-index fiber, the spectroscopic characteristics of liquid analytes located inside the nanochannel are imprinted onto the propagating mode via its evanescent fields, allowing to conduct absorption spectroscopic experiments at extremely small sample volume levels. We reveal the limits of this spectroscopic approach by analyzing the dependence of the power fraction inside the bore on the fiber parameters and experimentally demonstrate its capabilities by 1) using the cut-back technique using an optofluidic mount and 2) fully encapsulating a highly doped dye solution inside the nanobore fiber. Based on its high degree of integration and the straightforward handling capabilities, application of the nanobore fiber based absorption spectroscopy concept can be anticipated in fields, such as bioanalytics, analytical chemistry, and environmental science.
© 2018 IEEE
PDF Article
More Like This
Fiber Bragg gratings inscribed in nanobore fibers
Cong Xiong, Wei Jiang, Caoyuan Wang, Ruowei Yu, Jun He, Runxiao Chen, Xuan Li, Kang Ying, Haiwen Cai, Aiqun Liu, and Limin Xiao
Opt. Lett. 48(11) 2821-2824 (2023)
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription
Add to BibSonomy