Octave-spanning long-range plasmonic waveguide based on semiconductor-loading for mid-infrared monolithic sensors

Mauro David; Alicja Dabrowska; Masiar Sistani; Erik Hinkelmann; Ismael C. Doganlar; Hermann Detz; Walter M. Weber; Bernhard Lendl; Gottfried Strasser; Borislav Hinkov

doi:10.1117/12.2610311

9 March 2022 Octave-spanning long-range plasmonic waveguide based on semiconductor-loading for mid-infrared monolithic sensors

Mauro David, Alicja Dabrowska, Masiar Sistani, Erik Hinkelmann, Ismael C. Doganlar, Hermann Detz, Walter M. Weber, Bernhard Lendl, Gottfried Strasser, Borislav Hinkov

Author Affiliations +

Proceedings Volume PC12021, Novel In-Plane Semiconductor Lasers XXI; PC120210N (2022) https://doi.org/10.1117/12.2610311
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Semiconductor-loaded plasmonic (SLSPP)-waveguides are a very efficient link for optoelectronic devices, facilitating miniaturized photonic integrated circuits. However, for long-wave infrared applications (8-12 µm), the material selection is challenging as most commonly used mid-IR materials absorb in this region. Therefore, we selected and investigated the properties of germanium in a hybrid semiconductor-metal-configuration to overcome these limitations. The experimental characterization of Si(substrate)-Au-Ge fabricated SLSPP-waveguides show very good agreement with FEM-simulations. Moreover, the realized devices offer low losses between 8.8 and 22 dB/mm (single device) and even within 8.8-15 dB/mm (multiple devices), respectively, for the entire investigated octave-spanning 5.6 – 11.2 µm range.

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Mauro David, Alicja Dabrowska, Masiar Sistani, Erik Hinkelmann, Ismael C. Doganlar, Hermann Detz, Walter M. Weber, Bernhard Lendl, Gottfried Strasser, and Borislav Hinkov "Octave-spanning long-range plasmonic waveguide based on semiconductor-loading for mid-infrared monolithic sensors", Proc. SPIE PC12021, Novel In-Plane Semiconductor Lasers XXI, PC120210N (9 March 2022); https://doi.org/10.1117/12.2610311

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KEYWORDS

Mid-IR

Sensors

Plasmonic waveguides

Semiconductors

Plasmonics

Long wavelength infrared

Infrared radiation

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