Dielectric function in the spectral range (0.5–8.5)eV of an (Al_x Ga1−x)₂O₃ thin film with continuous composition spread

Abstract

Articles you may be interested inTemperature dependence of the dielectric function in the spectral range (0.5-8.5) eV of an In2O3 thin film

Ordinary dielectric function of corundumlike α−Ga2O3 from 40 meV to 20 eV

“…Substitution of Ga for Al in the corundum sesquioxide is expected to decrease transition energies. Similar behavior is reported for β sesquioxides [20] or when comparing AlN and GaN, both in the zinc-blende [65] and in the wurtzite polytype [66]. Also the classical III-V zinc-blende semiconductors AlAs and GaAs show a similar behavior [67].…”

“…The corundumlike α phase of Ga 2 O 3 [18] is especially attractive for technological and scientific purposes. Its most prominent advantage is the seamless integration with α-Al 2 O 3 , which is available as high-quality large-area substrates at a relatively low price [19][20][21]. Moreover, several metal oxides that crystallize in the corundumlike structure are also available as bulk, e.g., Cr 2 O 3 [22], opening the opportunity to investigate alternative substrates for α-Ga 2 O 3 .…”

Variation of Band Gap and Lattice Parameters of β−(AlxGa1−x)2O3 Powder Produced by Solution Combustion Synthesis

“…A handful of reports have been published that explore the relationships between alloy composition, crystal phase, and band gap of (Al x Ga 1− x ) 2 O 3 , and the results depend strongly both on fabrication method and on whether the material is a thin film or polycrystalline powder . Cooling from a liquid alloy yields β phase for 0 ≤ x ≤ x o , with mixed α + β reported at x o = 0.67 or x o = 0.80 for alloys precipitated from solution or mixed through grinding, respectively, and α phase for x > x o .…”

“…In contrast, Schmidt‐Grund et al. used spectroscopic ellipsometry to determine the dielectric function of (Al x Ga 1− x ) 2 O 3 CCS films on MgO in the 0.5–8.5 eV range and found a linear increase in the fundamental absorption edge with minimal bowing up to x = 0.5 …”

Monolithic Forward‐Looking Photodetector for Use as Ultra‐Compact Wavemeter with Wide Spectral Range

“…In this paper we model our concept for the Mg x Zn 1− x O material system for detection in the near UV region. However, other ternary of quaternary alloys such as (In,Ga) 2 O 3 and (Al,Ga) 2 O 3 on sapphire or well‐known (In,Ga)As, (Al,Ga)As, (In,Ga)N, (Al,Ga)N, (Cd,Zn)O, Zn(O,S), and so forth can be used for other wavelength ranges. Also chemical gradients in quaternary alloys such as, for example, (Al,Ga,In)As, (In,Ga)(As,P), (Al,Ga,In)N, (Mg,Zn,Cd)O, or (Al,Ga,In) 2 O 3 can be conceived.…”