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Conference papers
A Foundry-Compatible Plasmonic Material Platform Based on Heavily Doped Epitaxial Germanium-on-Silicon (poster)
Abstract : Replacing metals with thin-film semiconductor materials with high carrier density could led to a new generation of plasmonic devices, where plasmonic elements are integrated with standard electronic platforms [1]. In this framework, the most attractive thin-film materials are those whose growth is compatible with silicon foundry processes and silicon substrates. One notable example is electron-doped germanium (n-Ge), which features a small effective mass of 0.12 and supports heavy doping levels up to 3×1019 cm-3 hence allowing plasma frequencies up to the mid-infrared range.
In this work, we measured the optical and electrical transport properties of n-Ge thin films hetero-epitaxially grown on silicon substrates by plasma-enhanced chemical vapor deposition (PE-CVD). From normal-incidence reflectivity measurements and Hall-transport data taken on the as-grown materials as a function of temperature and dopant incorporation levels, we derived a phenomenological model of electron scattering from optical and acoustic phonons, charged impurities (donors and charged dislocations) and neutral impurities (crystal defects and neutral disclocations). The Kramers-Kronig relations were finally employed to calculate the complex dielectric function directly from the optical data in a model-free fashion, in order to perform electromagnetic simulations of plasmonic devices.
https://hal-iogs.archives-ouvertes.fr/hal-01713552
Contributor : Fatima Pereira <>
Submitted on : Tuesday, February 20, 2018 - 4:39:36 PM
Last modification on : Wednesday, December 2, 2020 - 4:02:10 PM
Contributor : Fatima Pereira <>
Submitted on : Tuesday, February 20, 2018 - 4:39:36 PM
Last modification on : Wednesday, December 2, 2020 - 4:02:10 PM