Liquid Core Waveguides by UV Modification of Nanoporous Polymer

Mads Brøkner Christiansen, Nimi Gopalakrishnan, Kaushal Shashikant Sagar, Anton Berthold, Sokol Ndoni, Anders Kristensen

Research output: Chapter in Book/Report/Conference proceedingConference abstract in proceedingsResearchpeer-review


Liquid core waveguides are fabricated from a self-assembled nanoporous polymer, with a porosity of 40%. The high porosity results in an effective refractive index of 1.26 for visible light, i.e. below the refractive index of aqueous solutions. However, since the polymer is hydrophobic, fluids to not initially penetrate into the pores. We show that the inner surface of the pores can be rendered selectively hydrophilic by exposing them to ultraviolet light thorough a photo mask1. As liquids infiltrate the exposed regions and replace air, the refractive index is raised to 1.42, and thus these areas can function as liquid core waveguides. Fig. 1 illustrates this principle.
Original languageEnglish
Title of host publicationIEEE Winter Topicals
Number of pages198
Publication date2011
ISBN (Print)978-1-4244-8428-7
Publication statusPublished - 2011
EventIEEE Winter Topicals - Keystone Lodge & Spa, Keystone, Colorado, United States
Duration: 10 Jan 201112 Jan 2011


ConferenceIEEE Winter Topicals
LocationKeystone Lodge & Spa
CountryUnited States
CityKeystone, Colorado
OtherThe Topical Meeting Series of the Photonics Society is the premier conference for emerging fields in photonic science, device technologies, and applications. The conferences are held in summer and winter to create the opportunity to learn about exciting new topics and to interact with the research and technology leaders in an intimate environment. A unique aspect of this conference series is that the Photonics Society membership suggest and organizes these meetings.

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