Determination of optical anisotropy in calcite from ultraviolet to mid-infrared by generalized ellipsometry

Thompson, Daniel W.; DeVries, Michael J.; Tiwald, Thomas E.; Woollam, John A.

doi:10.1016/s0040-6090(97)00843-2

Cited by 44 publications

(24 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are many different natural bulk HM such as hexagonal boron nitride and tetradymites, which have hyperbolic bands in the visible, near-infrared or inrared regime. For an overview of different natural HM listing the different respective hyperbolic bands, we refer the reader to the references [28][29][30][31][32]. Apart from natural HM, there also exists the possibility to artificially fabricate HMMs using nanostructuration methods.…”

Section: Hyperbolic Mediamentioning

confidence: 99%

See 1 more Smart Citation

Near-Field Heat Transfer between Multilayer Hyperbolic Metamaterials

Biehs

Ben‐Abdallah

2016

Zeitschrift Für Naturforschung A

View full text Add to dashboard Cite

Abstract:We review the near-field radiative heat flux between hyperbolic materials focusing on multilayer hyperbolic meta-materials. We discuss the formation of the hyperbolic bands, the impact of ordering of the multilayer slabs, as well as the impact of the first single layer on the heat transfer. Furthermore, we compare the contribution of surface modes to that of hyperbolic modes. Finally, we also compare the exact results with predictions from effective medium theory.

show abstract

Section: Hyperbolic Mediamentioning

confidence: 99%

“…On the other hand, for applications in the infrared, it is more beneficial to combine phononpolaritonic/semiconductor and dielectric components [17,[23][24][25][26][27]. Besides such hyperbolic meta-material (HMM) structures, there exist also quite a number of natural HM [28][29][30][31][32] for applications in the visible and infrared.…”

Section: Introductionmentioning

confidence: 99%

Near-Field Heat Transfer between Multilayer Hyperbolic Metamaterials

Biehs

Ben‐Abdallah

2016

Zeitschrift Für Naturforschung A

View full text Add to dashboard Cite

show abstract

“…11, 12 Thompson et al 13 measured calcite using generalized IR-SE. The anisotropic effects of thin polycrystalline BN films were studied by Franke et al 14 The origin of the Berreman peak and its effect on IR-SE spectra has been described in detail by Röseler.…”

Section: Introductionmentioning

confidence: 99%

Carrier concentration and lattice absorption in bulk and epitaxial silicon carbide determined using infrared ellipsometry

et al. 1999

Self Cite

View full text Add to dashboard Cite

Wetteroth, T.; Wilson, S. R.; and Powell, Adrian R., "Carrier concentration and lattice absorption in bulk and epitaxial silicon carbide determined using infrared ellipsometry" (1999 Carrier concentration and lattice absorption in bulk and epitaxial silicon carbide determined using infrared ellipsometry We have measured the dielectric function of bulk nitrogen-doped 4H and 6H SiC substrates from 700 to 4000 cm Ϫ1 using Fourier-transform infrared spectroscopic ellipsometry. Photon absorption by transverse optical phonons produces a strong reststrahlen band between 797 and 1000 cm Ϫ1 with the effects of phonon anisotropy being observed in the region of the longitudinal phonon energy ͑960 to 100 cm Ϫ1 ͒. The shape of this band is influenced by plasma oscillations of free electrons, which we describe with a classical Drude equation. For the 6H-SiC samples, we modify the Drude equation to account for the strong effective mass anisotropy. Detailed numerical regression analysis yields the free-electron concentrations, which range from 7ϫ10 17 to 10 19 cm Ϫ3 , in good agreement with electrical and secondary ion mass spectrometry measurements.Finally, we observe the Berreman effect near the longitudinal optical phonon energy in nϪ/nϩ homoepitaxial 4H SiC and hydrogen implanted samples, and we are able to determine the thickness of these surface layers.

show abstract

“…The samples were measured by IRSE at two angles of incidence (60°, 70°), and for wavenumbers from 250 cm -1 to 700 cm -1 with 2cm -1 resolution. A commercially available (J.A.Woollam Co.) rotatingcompensator, rotating-polarizer, Fourier-transformbased variable-angle-of-incidence spectroscopic ellipsometer was used [28].…”

Section: Methodsmentioning

confidence: 99%

Free-carrier effects and optical phonons in GaNAs/GaAs superlattice heterostructures measured by infrared spectroscopic ellipsometry

Šik

Schubert

Hofmann³

et al. 2000

MRS Internet j. nitride semicond. res.

View full text Add to dashboard Cite

The infrared-optical properties of GaAs/GaN x As 1 -x superlattice (SL) heterostructures (0 < x < 3.3%) are studied by variable angle-of-incidence infrared spectroscopic ellipsometry (IRSE) for wavenumbers from 250 cm -1 to 700 cm -1 . The undoped SL structures where grown on top of a 300 nm thick undoped GaAs buffer layer on Te-doped (001) GaAs substrates by metal-organic vapor phase epitaxy (MOVPE). We observe the well-known Berreman-polariton effect within the GaAs LO-phonon region. We further observe a strong polariton-like resonance near the coupled longitudinal-optical plasmon-phonon frequency of the Te-doped substrate at 306 cm -1 . For analysis of the IRSE data we employ the harmonic oscillator dielectric function model and the Drude model for free-carrier response. The additional resonance feature is explained by pseudo surface polariton (PSP) interface modes between the Te-doped GaAs and the undoped GaAs buffer layer / SL film. We find that the PSP modes are extremely sensitive to free-carrier properties within the SL structures, and we obtain a strong increase in free-carrier concentration within the GaNAs SL sublayers with increasing x from analysis of the IRSE data. We further observe the localized vibrational modes of nitrogen at 470 cm -1 in the GaN x As 1 -x SL sublayers with a polar strength that increases linearly with x , and which can be used to monitor the nitrogen concentration in GaN x As 1 -x .

show abstract

Determination of optical anisotropy in calcite from ultraviolet to mid-infrared by generalized ellipsometry

Cited by 44 publications

References 2 publications

Near-Field Heat Transfer between Multilayer Hyperbolic Metamaterials

Near-Field Heat Transfer between Multilayer Hyperbolic Metamaterials

Carrier concentration and lattice absorption in bulk and epitaxial silicon carbide determined using infrared ellipsometry

Free-carrier effects and optical phonons in GaNAs/GaAs superlattice heterostructures measured by infrared spectroscopic ellipsometry

Contact Info

Product

Resources

About