Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 7 of 7 for “"Reststrahlen"”.
-
Reststrahlen band optics for the advancement of far-infrared optical architecture
… namely, the Drude formalism, semiconductor Reststrahlen bands, and surface polaritons. Lastly, some of the physical challenges that impede the further advancement of far-infrared technology, despite remarkable recent success in adjacent regions of the electromagnetic spectrum, are discussed. …
-
Development of terahertz quantum-cascade lasers
… of terahertz QCLs at frequencies below the Reststrahlen band in the semiconductor ( ... ), is significantly more challenging as compared to that of the mid-infrared QCLs. Firstly, due to small energy separation between the laser levels various intersubband scattering mechanisms are …
-
Analysis of the electron transport properties in quantum cascade lasers
… the mid-infrared to the far-infrared beow the Reststrahlen band (THz frequencies). Especially for THz QCLs, a detailed understanding of the dynamics of the electron transport is essential in order to extend their operation to longer wavelengths and higher temperatures. Compared to mid-infrared …
-
Terahertz quantum cascade lasers
… with photon energies below the semiconductor Reststrahlen band. Photons are emitted via electronic intersubband transitions that take place entirely within the conduction band, where the wavelength is chosen by engineering the well and barrier widths in multiple-quantum-well heterostructures. …
-
Development of terahertz diffractive optics and plasmon-phonon polaritonics components /
… in the infrared spectral range described by the Reststrahlen band of the semiconductor. Optical spectra modelling of heavily doped n-GaN surface relief gratings and metal grating coupled heterostructures was carried out using custom modified rigorous coupled wave analysis method. Optimal n-GaN …
-
A fundamental study of epitaxial graphene on silicon carbide on silicon for mid-infrared nanophotonics
… broadening spectral resonances outside the SiC’s Reststrahlen band, resulting from the hybridisation of localised SPhP-SPP modes in graphene/SiC nanowires system. Furthermore, we demonstrate extreme subwavelength confinement of the MIR photons within a few nanometers thick oxide layer between …
-
NATURAL ANALOGUES OF PLANET MERCURY’S SURFACE: MINERALOGICAL AND SPECTROSCOPIC ASPECTS
… and shifts of Christiansen Features (CFs) and Reststrahlen Bands (RBs) positions toward longer wavelengths in MIR spectra. C+ irradiation produces stronger darkening ef-fects than He+, and the presence of carbon in the sample prior to irradiation appears to cause more pronounced spectral …