MoS2monolayers on Si and SiO2nanocone arrays: influences of 3D dielectric material refractive index on 2D MoS2optical absorption

Nanoscale ◽  
2018 ◽  
Vol 10 (40) ◽  
pp. 18920-18925 ◽  
Author(s):  
Eunah Kim ◽  
Jin-Woo Cho ◽  
Tri Khoa Nguyen ◽  
Trang Thi Thu Nguyen ◽  
Seokhyun Yoon ◽  
...  
Keyword(s):  
Refractive Index ◽  
Optical Absorption ◽  
Dielectric Material ◽  
Light Confinement ◽  
Weak Light ◽  
Material Refractive Index ◽  
Low Refractive Index

The weak light confinement in low refractive index SiO2nanocone (NC) leads to greater optical absorption in the MoS2monolayers on SiO2NCs, compared with that on Si NCs.

OMNI-DIRECTIONAL REFLECTOR USING A LOW REFRACTIVE INDEX MATERIAL

2004 ◽  
Vol 14 (03) ◽  
pp. 726-731
Author(s):  
J.-Q. XI ◽  
MANAS OJHA ◽  
WOOJIN CHO ◽  
TH. GESSMANN ◽  
E. F. SCHUBERT ◽  
...  
Keyword(s):  
Refractive Index ◽  
Dielectric Material ◽  
Metal Layer ◽  
Transverse Magnetic ◽  
Bragg Reflector ◽  
Light Extraction Efficiency ◽  
Distributed Bragg Reflector ◽  
Triple Layer ◽  
Quarter Wavelength ◽  
Low Refractive Index

Triple-layer omni-directional reflectors (ODRs) consisting of a semiconductor, a transparent quarter-wavelength dielectric layer and metal layer have high reflectivities at all angles of incidence. In this paper, triple-layer ODRs are demonstrated that incorporate nanoporous SiO 2, a novel low-refractive-index (low-n) material with refractive indices n ≪ 1.46 as well as dense SiO 2 (n = 1.46). GaP and Ag serve as the semiconductor and metal layer materials, respectively. An angle-integrated transverse electric (TE) mode reflectivity of R avg | TE = 99.9 % and transverse magnetic (TM) mode reflectivity R avg | TM = 98.9 % are calculated for the triple-layer ODRs employing nanoporous SiO 2. Reflectivity measurements, including the angular dependence of R, are presented. Novel hybrid ODRs consisting of semiconductor, a several micron thick low-n dielectric material layer, a distributed Bragg reflector (DBR) and metal layer have outstanding reflectivities for all incident angles. GaP and Ag serve as the semiconductor and metal layer, respectively. Nanoporous SiO 2 is used as the low-n material. TiO 2 and dense SiO 2 serve as the DBR materials. The angle-intergrated reflectivities of the TE and TM modes are calculated to be larger than 99.9 % for the hybrid ODRs. The results indicate the great potential of the ODRs for light-emitting diodes with high light extraction efficiency.

Xylene-Cellulose Caprate as a Histologic Mounting Medium of Low Refractive Index

1955 ◽  
Vol 30 (3) ◽  
pp. 133-134 ◽  
Author(s):  
R. D. Lillie ◽  
J. P. Greco Henson
Keyword(s):  
Refractive Index ◽  
Low Refractive Index

scholarly journals A Highly Sensitive SPR Sensors Based on Two Parallel PCFs for Low Refractive Index Detection

2018 ◽  
Vol 10 (4) ◽  
pp. 1-10 ◽  
Author(s):  
Famei Wang ◽  
Chao Liu ◽  
Zhijie Sun ◽  
Tao Sun ◽  
Banghua Liu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Highly Sensitive ◽  
Low Refractive Index ◽  
Refractive Index Detection

LINEAR AND NONLINEAR INTERSUBBAND OPTICAL ABSORPTION OF FINITE AND INFINITE SEMI-PARABOLIC QUANTUM WELLS

2011 ◽  
Vol 25 (07) ◽  
pp. 497-507 ◽  
Author(s):  
M. J. KARIMI ◽  
A. KESHAVARZ ◽  
A. POOSTFORUSH
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Optical Absorption ◽  
Quantum Well ◽  
Quantum Wells ◽  
Resonant Peak ◽  
Energy Eigenvalues ◽  
Finite Case ◽  
Infinite Case ◽  
Index Changes

In this work, the optical absorption coefficients and the refractive index changes for the infinite and finite semi-parabolic quantum well are calculated. Numerical calculations are performed for typical GaAs / Al x Ga 1-x As semi-parabolic quantum well. The energy eigenvalues and eigenfunctions of these systems are calculated numerically. Optical properties are obtained using the compact density matrix approach. Results show that the energy eigenvalues and the matrix elements of the infinite and finite cases are different. The calculations reveal that the resonant peaks of the optical properties of the finite case occur at lower values of the incident photon energy with respect to the infinite case. Results indicate that the maximum value of the refractive index changes for the finite case are greater than that of the infinite case. Our calculations also show that in contrast to the infinite case, the resonant peak value of the total absorption coefficient in the case of the finite well is a non-monotonic function of the semi-parabolic confinement frequency.

scholarly journals Air-trench splitters for ultra-compact ring resonators in low refractive index contrast waveguides

2008 ◽  
Vol 16 (1) ◽  
pp. 456 ◽  
Author(s):  
Nazli Rahmanian ◽  
Seunghyun Kim ◽  
Yongbin Lin ◽  
Gregory P. Nordin
Keyword(s):  
Refractive Index ◽  
Ring Resonators ◽  
Compact Ring ◽  
Refractive Index Contrast ◽  
Index Contrast ◽  
Low Refractive Index

Direct laser writing and applications of dielectric microstructures with low refractive index contrast

2011 ◽  
Author(s):  
Vygantas Mizeikis ◽  
Vytautas Purlys ◽  
Lina Maigyte ◽  
Kestutis Staliunas ◽  
Saulius Juodkazis
Keyword(s):  
Refractive Index ◽  
Direct Laser Writing ◽  
Laser Writing ◽  
Refractive Index Contrast ◽  
Direct Laser ◽  
Index Contrast ◽  
Low Refractive Index

Wide-Band Self-Collimation in Low Refractive Index Hexagonal Lattice

2021 ◽  
Author(s):  
Chun Xia ◽  
Stephen Kuebler ◽  
Noel Martinez ◽  
MANUEL Martinez ◽  
Raymond Rumpf ◽  
...  
Keyword(s):  
Refractive Index ◽  
Hexagonal Lattice ◽  
Wide Band ◽  
Low Refractive Index
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