Ellipsometrical measurements to the optical constants of chromium films on glass substrates in the visible spectral range

1981 ◽  
Vol 16 (5) ◽  
pp. K72-K74
Author(s):  
K. Löschke
Keyword(s):  
Spectral Range ◽  
Optical Constants ◽  
Visible Spectral Range ◽  
Glass Substrates ◽  
Chromium Films

Ellipsometric examination of ion-plated chromium films in the visible spectral range

1980 ◽  
Vol 72 (3) ◽  
pp. L21-L23 ◽  
Author(s):  
E. Idczak ◽  
E. Oleszkiewicz ◽  
M. Tańcula
Keyword(s):  
Spectral Range ◽  
Visible Spectral Range ◽  
Chromium Films

Optical constants of Ag2Se in the visible spectral range

1987 ◽  
Vol 100 (1) ◽  
pp. K81-K82 ◽  
Author(s):  
V. Hönig ◽  
A. Thomas
Keyword(s):  
Spectral Range ◽  
Optical Constants ◽  
Visible Spectral Range

scholarly journals MoS2 Based Photodetectors: A Review

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2758
Author(s):  
Alberto Taffelli ◽  
Sandra Dirè ◽  
Alberto Quaranta ◽  
Lucio Pancheri
Keyword(s):  
Electric Fields ◽  
Spectral Range ◽  
Performance Metrics ◽  
Transition Metal Dichalcogenides ◽  
Visible Spectral Range ◽  
Detector Performance ◽  
Strong Light ◽  
Near Ultraviolet ◽  
Passivation Layers ◽  
Low Dimensional

Photodetectors based on transition metal dichalcogenides (TMDs) have been widely reported in the literature and molybdenum disulfide (MoS2) has been the most extensively explored for photodetection applications. The properties of MoS2, such as direct band gap transition in low dimensional structures, strong light–matter interaction and good carrier mobility, combined with the possibility of fabricating thin MoS2 films, have attracted interest for this material in the field of optoelectronics. In this work, MoS2-based photodetectors are reviewed in terms of their main performance metrics, namely responsivity, detectivity, response time and dark current. Although neat MoS2-based detectors already show remarkable characteristics in the visible spectral range, MoS2 can be advantageously coupled with other materials to further improve the detector performance Nanoparticles (NPs) and quantum dots (QDs) have been exploited in combination with MoS2 to boost the response of the devices in the near ultraviolet (NUV) and infrared (IR) spectral range. Moreover, heterostructures with different materials (e.g., other TMDs, Graphene) can speed up the response of the photodetectors through the creation of built-in electric fields and the faster transport of charge carriers. Finally, in order to enhance the stability of the devices, perovskites have been exploited both as passivation layers and as electron reservoirs.

Analysis of Cu(InGa)Se2 Alloy Film Optical Properties and the Effect of Cu Off-Stoichiometry

2005 ◽  
Vol 865 ◽  
Author(s):  
P. D. Paulson ◽  
S. H. Stephens ◽  
W. N. Shafarman
Keyword(s):  
Optical Constants ◽  
Soda Lime ◽  
Alloy Film ◽  
Relative Volume ◽  
Soda Lime Glass ◽  
Distinctive Features ◽  
Glass Substrates ◽  
Wide Range ◽  
Two Phases

AbstractVariable angle spectroscopic ellipsometry has been used to characterize Cu(InGa)Se2 thin films as a function of relative Ga content and to study the effects of Cu off-stoichiometry. Uniform Cu(InGa)Se2 films were deposited on Mo-coated soda lime glass substrates by elemental evaporation with a wide range of relative Cu and Ga concentrations. Optical constants of Cu(InGa)Se2 were determined over the energy range of 0.75–C4.6 eV for films with 0 ≤ Ga/(In+Ga) ≤ 1 and used to determine electronic transition energies. Further, the changes in the optical constants and electronic transitions as a function of Cu off-stoichiometry were determined in Cu-In-Ga-Se films with Cu atomic concentration varying from 10 to 25 % and Ga/(In+Ga) = 0.3. Films with Cu in the range 16–24 % are expected to contain 2 phases so an effective medium approximation is used to model the data. This enables the relative volume fractions of the two phases, and hence composition, to be determined. Two distinctive features are observed in the optical spectra as the Cu concentration decreases. First, the fundamental bandgaps are shifted to higher energies. Second, the critical point features at higher energies become broader suggesting degradation of the crystalline quality of the material.

scholarly journals TiN/(Al,Sc)N metal/dielectric superlattices and multilayers as hyperbolic metamaterials in the visible spectral range

2014 ◽  
Vol 90 (12) ◽  
Author(s):  
Bivas Saha ◽  
Gururaj V. Naik ◽  
Sammy Saber ◽  
Cem Akatay ◽  
Eric A. Stach ◽  
...  
Keyword(s):  
Spectral Range ◽  
Visible Spectral Range ◽  
Hyperbolic Metamaterials

scholarly journals Plasmonic lattice Kerker effect in ultraviolet-visible spectral range

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
V. S. Gerasimov ◽  
A. E. Ershov ◽  
R. G. Bikbaev ◽  
I. L. Rasskazov ◽  
I. L. Isaev ◽  
...  
Keyword(s):  
Spectral Range ◽  
Visible Spectral Range

PUCHEROS: a low-cost fiber-fed Echelle Spectrograph for the visible spectral range

2010 ◽  
Author(s):  
Leonardo Vanzi ◽  
Juan A. Chacon ◽  
Maurizio Baffico ◽  
Gerardo Avila ◽  
Carlos Guirao ◽  
...  
Keyword(s):  
Spectral Range ◽  
Low Cost ◽  
Visible Spectral Range ◽  
Echelle Spectrograph
Sign in / Sign up

Export Citation Format

Share Document