3D-nanoprinted on-chip antiresonant waveguide with hollow core and microgaps for integrated optofluidic spectroscopy

GND
1229560742
ORCID
0000-0001-6785-0446
Affiliation
Leibniz Institute of Photonic Technology Jena
Kim, Jisoo;
Affiliation
Chair in Hybrid Nanosystems, Nanoinstitute Munich, Ludwig-Maximilians-Universität Munich
Bürger, Johannes;
GND
1238038018
ORCID
0000-0001-8651-427X
Affiliation
Leibniz Institute of Photonic Technology, Jena
Jang, Bumjoon;
GND
0000-0001-8651-427X
Affiliation
Leibniz Institute of Photonic Technology, Jena
Zeisberger, Matthias;
Affiliation
Chair in Hybrid Nanosystems, Nanoinstitute Munich, Ludwig-Maximilians-Universität Munich
Gargiulo, Julian;
Affiliation
Chair in Hybrid Nanosystems, Nanoinstitute Munich, Ludwig-Maximilians-Universität Munich
Menzes, Leonard de S.;
Affiliation
Chair in Hybrid Nanosystems, Nanoinstitute Munich, Ludwig-Maximilians-Universität Munich
Maier, Stefan A.;
GND
1195327765
ORCID
0000-0002-5324-6405
Affiliation
Leibniz Institute of Photonic Technology, Jena
Schmidt, Markus A.

Here, we unlock the properties of the recently introduced on-chip hollow-core microgap waveguide in the context of optofluidics which allows for intense light-water interaction over long lengths with fast response times. The nanoprinted waveguide operates by the antiresonance effect in the visible and near-infrared domain and includes a hollow core with defined gaps every 176 μm. The spectroscopic capabilities are demonstrated by various absorption-related experiments, showing that the Beer-Lambert law can be applied without any modification. In addition to revealing key performance parameters, time-resolved experiments showed a decisive improvement in diffusion times resulting from the lateral access provided by the microgaps. Overall, the microgap waveguide represents a pathway for on-chip spectroscopy in aqueous environments.

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