Advanced mid-infrared plasmonic waveguides for on-chip integrated photonics

Mauro David; Davide Disnan; Elena Arigliani; Anna Lardschneider; Georg Marschick; Hanh T. Hoang; Hermann Detz; Bernhard Lendl; Ulrich Schmid; Gottfried Strasser; Borislav Hinkov

doi:10.1364/prj.495729

journal article Sep 27, 2023

Advanced mid-infrared plasmonic waveguides for on-chip integrated photonics

Mauro David

Davide Disnan Elena Arigliani Anna Lardschneider Georg Marschick Hanh T. Hoang Hermann Detz

Bernhard Lendl

Ulrich Schmid Gottfried Strasser

Borislav Hinkov

Photonics Research Vol. 11 No. 10 pp. 1694 · Optica Publishing Group

View at Publisher Save 10.1364/prj.495729

Abstract

Long-wave infrared (LWIR, 8–14 µm) photonics is a rapidly growing research field within the mid-IR with applications in molecular spectroscopy and optical free-space communication. LWIR applications are often addressed using rather bulky tabletop-sized free-space optical systems, preventing advanced photonic applications, such as rapid-time-scale experiments. Here, device miniaturization into photonic integrated circuits (PICs) with maintained optical capabilities is key to revolutionize mid-IR photonics. Subwavelength mode confinement in plasmonic structures enabled such miniaturization approaches in the visible-to-near-IR spectral range. However, adopting plasmonics for the LWIR needs suitable low-loss and -dispersion materials with compatible integration strategies to existing mid-IR technology. In this paper, we further unlock the field of LWIR/mid-IR PICs by combining photolithographic patterning of organic polymers with dielectric-loaded surface plasmon polariton (DLSPP) waveguides. In particular, polyethylene shows favorable optical properties, including low refractive index and broad transparency between ∼2 μm and 200 µm. We investigate the whole value chain, including design, fabrication, and characterization of polyethylene-based DLSPP waveguides and demonstrate their first-time plasmonic operation and mode guiding capabilities along S-bend structures. Low bending losses of ∼1.3 dB and straight-section propagation lengths of ∼1 mm, pave the way for unprecedented complex on-chip mid-IR photonic devices. Moreover, DLSPPs allow full control of the mode parameters (propagation length and guiding capabilities) for precisely addressing advanced sensing and telecommunication applications with chip-scale devices.

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Metrics

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Citations

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References

Details

Published: Sep 27, 2023
Vol/Issue: 11(10)
Pages: 1694

Authors

TU Wien

Central European Institute of Technology, Brno University of Technology

B

Bernhard Lendl

Institute of Chemical Technologies and Analytics

TU Wien

Funding

Horizon 2020 Framework Programme Award: 780240

Austrian Science Fund Award: M2485-N34

Cite This Article

Mauro David, Davide Disnan, Elena Arigliani, et al. (2023). Advanced mid-infrared plasmonic waveguides for on-chip integrated photonics. Photonics Research, 11(10), 1694. https://doi.org/10.1364/prj.495729

Advanced mid-infrared plasmonic waveguides for on-chip integrated photonics

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