scholarly journals Blue shift effect on the reflectance in two-dimensional Si-ZnO photonic structure with patterned coupled optical micro-cavities

2019 ◽  
Vol 1221 ◽  
pp. 012014
Author(s):  
J A Medina Vázquez ◽  
E Y González Ramírez ◽  
J G Murillo-Ramírez ◽  
V M Carrillo-Vázquez ◽  
G Herrera ◽  
...  
Keyword(s):  
Blue Shift ◽  
Two Dimensional ◽  
Photonic Structure ◽  
Shift Effect

Multiple Čerenkov second-harmonic waves in a two-dimensional nonlinear photonic structure

2010 ◽  
Vol 35 (22) ◽  
pp. 3790 ◽  
Author(s):  
Wenjie Wang ◽  
Yan Sheng ◽  
Yongfa Kong ◽  
Ady Arie ◽  
Wieslaw Krolikowski
Keyword(s):  
Second Harmonic ◽  
Harmonic Waves ◽  
Two Dimensional ◽  
Photonic Structure

ACCEPTOR-RELATED RADIATIVE RECOMBINATION OF QUASI-TWO-DIMENSIONAL ELECTRONS IN MODULATION-DOPED GaAs/AlxGa1−xAs HETEROJUNCTIONS

1996 ◽  
Vol 10 (08) ◽  
pp. 323-328
Author(s):  
S.J. CHUA ◽  
S.J. XU ◽  
X.H. TANG
Keyword(s):  
Spatial Distribution ◽  
Temperature Change ◽  
Line Shape ◽  
Radiative Recombination ◽  
Blue Shift ◽  
Rapid Decrease ◽  
Low Energy ◽  
Two Dimensional ◽  
Band Bending

The radiative recombination of quasi-two-dimensional electrons with photoexcited holes bound to acceptors is investigated in modulation-doped GaAs / Al x Ga 1–x As heterojunctions. With increase in temperature, a blue shift of about 2.5 meV is observed for a temperature change from 4 K to 40 K. Also, observed is a rapid decrease in intensity of its low energy peaks. This change in line shape of the acceptor-related emission in the GaAs / Al x Ga 1–x As heterojunctions is accounted for by the effect of band bending and the spatial distribution of acceptors.

scholarly journals The Effect of Extended Ball-Milling upon Three-Dimensional and Two-Dimensional Perovskite Crystals Properties

2020 ◽  
Vol 10 (14) ◽  
pp. 4775
Author(s):  
Sara Bonomi ◽  
Vincenza Armenise ◽  
Gianluca Accorsi ◽  
Silvia Colella ◽  
Aurora Rizzo ◽  
...  
Keyword(s):  
Ball Milling ◽  
Structural Transition ◽  
Direct Synthesis ◽  
Three Dimensional ◽  
Blue Shift ◽  
Two Dimensional ◽  
Grinding Method ◽  
Organometal Halide Perovskite ◽  
Crystallite Dimension ◽  
2D And 3D

The ball-milling of materials is a mechanical grinding method that has different effects on treated materials, and can be used for the direct synthesis of organometal halide perovskite (OHP) crystals. Herein, the effect of such a process, extended over a large temporal window, is related to the properties of referential three-dimensional (3D) MAPbI3 (MA = methylammonium) and two-dimensional (2D) PEA2PbI4 (PEA = phenylethylammonium) perovskite crystals. For both 2D and 3D systems, the ball-milling induces a reduction of the crystallite dimension, accompanied by a worsening of the overall crystallinity, but without any sign of amorphization. For MAPbI3, an intriguing room temperature structural transition, from tetragonal to cubic, is observed. The processing in both cases impacts on the morphology, with a reduction of the crystal shape quality connected to the particles’ agglomeration tendency. All these effects translate to a “blue shift” of the absorption and emission features, suggesting the use of this technique to modulate the 3D and 2D OHPs’ properties.

scholarly journals Photonic Structure-Integrated Two-Dimensional Material Optoelectronics

Electronics ◽  
2016 ◽  
Vol 5 (4) ◽  
pp. 93 ◽  
Author(s):  
Tianjiao Wang ◽  
Ya-Qiong Xu
Keyword(s):  
Two Dimensional ◽  
Photonic Structure

scholarly journals Two-dimensional amorphous photonic structure in the ligament of bivalve Lutraria maximum

2010 ◽  
Vol 18 (13) ◽  
pp. 13361 ◽  
Author(s):  
Gang Sheng Zhang ◽  
Zeng Qiong Huang
Keyword(s):  
Two Dimensional ◽  
Photonic Structure

Plasmon excitations in doped square-lattice atomic clusters

2017 ◽  
Vol 31 (30) ◽  
pp. 1750233 ◽  
Author(s):  
Yaxin Wang ◽  
Ya-Bin Yu
Keyword(s):  
Tight Binding ◽  
Blue Shift ◽  
Coulomb Repulsion ◽  
Atomic Clusters ◽  
Red Shift ◽  
Square Lattice ◽  
Local Mode ◽  
Two Dimensional ◽  
Binding Model ◽  
Dopant Atoms

Employing the tight-binding model, we theoretically study the properties of the plasmon excitations in doped square-lattice atomic clusters. The results show that the dopant atoms would blur the absorption spectra, and give rise to extra plasmon resonant peaks as reported in the literature; however, our calculated external-field induced oscillating charge density shows that no obvious evidences indicate the so-called local mode of plasmon appearing in two-dimensional-doped atomic clusters, but the dopants may change the symmetry of the charge distribution. Furthermore, we show that the disorder of the energy level due to dopant makes the absorption spectrum has a red- or blue-shift, which depends on the position of impurities; disorder of hopping due to dopant makes a blue- or red-shift, a larger (smaller) hopping gives a blue-shift (red-shift); and a larger (smaller) host-dopant and dopant–dopant intersite coulomb repulsion induces a blue-shift (red-shift).

Preparation, Structure and Optical Properties of [CH3SC(NH2)2]3SnI5, [CH3SC(NH2)2][HSC(NH2)2]SnBr4, (CH3C5H4NCH3)PbBr3, and [C6H5CH2SC(NH2)2]4Pb3I10

2002 ◽  
Vol 57 (6) ◽  
pp. 645-650 ◽  
Author(s):  
C. P. Raptopoulou ◽  
A. Terzis ◽  
G. A. Mousdis ◽  
G. C. Papavassiliou
Keyword(s):  
Crystal Structure ◽  
Optical Properties ◽  
Blue Shift ◽  
Two Dimensional ◽  
Optical Absorption Spectra ◽  
Absorption Bands ◽  
One Dimensional ◽  
Excitonic Absorption ◽  
Low Dimensional ◽  
Inorganic Network

AbstractThe preparation, crystal structure and optical absorption spectra of [CH3SC(NH2)2]3SnI5 (1), [CH3SC(NH2)2][HSC(NH2)2]SnBr4 (2), (CH3C5H4NCH3)PbBr3 (3), and [C6H5CH2SC-(NH2)2]4Pb3I10 (4) are reported. The compounds 1, 2, 3 consist of MX6-octahedra (M = Sn, Pb, X = I, Br) forming one-dimensional single chains (compounds 1, 3) or double chains (compound 2). The compound 4 forms a two-dimensional inorganic network via corner sharing of three face sharing octahedral units. Because of their low-dimensional character, a blue shift of the excitonic absorption bands, in comparison to those of higher dimensionality systems, is observed.

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