Photoluminescence and Raman Scattering Signatures of Anisotropic Optical Properties in Freestanding m-, a- and c-Plane GaN Substrates

2020 ◽  
Vol 124 (33) ◽  
pp. 18203-18208
Author(s):  
Mingzheng Wang ◽  
Ke Xu ◽  
Shijie Xu
Keyword(s):  
Optical Properties ◽  
Raman Scattering

The Effect of Organic Cation Dynamics on the Optical Properties in (PEA)2(MA)[Pb2I7] Perovskite Dimorphs

2021 ◽  
Author(s):  
Lekina Yulia ◽  
Sai Dintakurti ◽  
Benny Febriansyah ◽  
David George Bradley ◽  
Jiaxu Yan ◽  
...  
Keyword(s):  
Phase Transition ◽  
Optical Properties ◽  
Raman Scattering ◽  
Organic Cation ◽  
Two Dimensional ◽  
Lead Iodide ◽  
Temperature Dependent ◽  
Hybrid Perovskite

Two-dimensional (2D) phenylethyl ammonium (PEA+)-methyl ammonium (MA+) lead iodide ((PEA)2(MA)[Pb2I7]) hybrid perovskite exists as temperature-dependent dimorphs exhibiting an ill-defined phase transition occurring over 150 - 200 K range. Raman scattering,...

The Effect of Heat Treatment on the Optical Properties of Copper-Containing Lithium-Potassium-Borate Glasses

2018 ◽  
Vol 57 (1) ◽  
pp. 116-120
Author(s):  
P.S. Shirshnev ◽  
V.L. Ugolkov ◽  
Zh.G. Snezhnaia ◽  
D.I. Panov ◽  
E.V. Shirshneva-Vaschenko ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Optical Properties ◽  
Raman Scattering ◽  
Copper Ions ◽  
Xrd Analysis ◽  
Luminescence Spectra ◽  
Borate Glasses ◽  
Potassium Borate ◽  
Narrow Bands

Abstract The paper presents the investigation of lithium-potassium-alumoborate glasses (0- 25 mol.% Li2O) doped by copper ions. The effect of glass annealing on the Raman scattering patterns is discussed. It is shown that such an annealing results in drastic changes in the Raman scattering patterns for the glass with 10 mol.%of Li2O: the band at 481 cm-1 conventionally attributed to boron-oxygen bonds in metaborate rings disappears, while a set of narrow bands at 1236, 1500, and 1783 cm-1 is observed. We consider one of these bands, 1783 cm-1, as being the identifier of the formed Li(Al7B4O17) nanophase, XRD analysis supported the above suggestion. The effect of newly formed nanophase on the luminescence spectra is discussed.

Optical Properties of Nonstoichiometric Tantalum Oxide TaOx (x < 5/2) According to Spectral-Ellipsometry and Raman-Scattering Data

2018 ◽  
Vol 124 (6) ◽  
pp. 808-813 ◽  
Author(s):  
V. N. Kruchinin ◽  
V. A. Volodin ◽  
T. V. Perevalov ◽  
A. K. Gerasimova ◽  
V. Sh. Aliev ◽  
...  
Keyword(s):  
Optical Properties ◽  
Raman Scattering ◽  
Tantalum Oxide ◽  
Scattering Data ◽  
Spectral Ellipsometry

Lattice Relaxation Effects in Si and GaAs Nanocrystals

1994 ◽  
Vol 358 ◽  
Author(s):  
X. S. Zhao ◽  
Y. R. Ge ◽  
J. Schroeder ◽  
P. D. Persans
Keyword(s):  
Gallium Arsenide ◽  
Optical Properties ◽  
Porous Silicon ◽  
Raman Scattering ◽  
Lattice Relaxation ◽  
Experimental Results ◽  
Vibrational Modes ◽  
Strain Effects ◽  
Relaxation Effects ◽  
Almost All

ABSTRACTRaman scattering results on porous silicon, and silicon and gallium arsenide nanocrystals show that almost all vibrational modes become Raman active and remarkably soft in these nanocrystal systems. The experimental results further demonstrate that the carrier-induced strain effects play an important role on the optical properties of such nanocrystal systems.

Raman scattering and photoluminescence investigation of YBO3:Eu3+ under high temperature and high pressure

2015 ◽  
Vol 3 (10) ◽  
pp. 2405-2412 ◽  
Author(s):  
W. S. Song ◽  
G. X. Y. Huang ◽  
R. C. Dai ◽  
Z. P. Wang ◽  
Z. M. Zhang
Keyword(s):  
High Pressure ◽  
Optical Properties ◽  
High Temperature ◽  
Raman Scattering ◽  
Dynamic Method ◽  
Effect Of Temperature ◽  
Temperature And Pressure

The effect of temperature and pressure on structure of YBO3:Eu was characterized by Raman scattering and on optical properties was analyzed by luminescent dynamic method.

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