Suspended low-loss germanium waveguides for the longwave-infrared
- Osman, A.
- Nedeljković, Miloš
- Soler Penadés, J.
- Wu, Y.
- Qu, Z.
- Khokhar, A. Z.
- Mashanovich, G. Z.
DOIAbstract
Germanium has become a material of high interest for mid-infrared (MIR) integrated photonics due to its complementary metal-oxide-semiconductor (CMOS) compatibility and its wide transparency window covering the 2-15 µm spectral region exceeding the 4 µm and 8 µm limit of the Silicon-on-Insulator (SOI) platform and Si material respectively. Here, we present suspended germanium waveguides operating at wavelengths of 3.8 µm and 7.67 µm with propagation losses of 2.9 ± 0.2 dB/cm and 2.6 ± 0.3 dB/cm respectively
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