Photonic band gap effect and dye-encapsulated cucurbituril-triggered enhanced fluorescence using monolithic colloidal photonic crystals

2019 ◽  
Vol 43 (41) ◽  
pp. 16264-16272 ◽  
Author(s):  
V. V. Vipin ◽  
Parvathy R. Chandran ◽  
Animesh M. Ramachandran ◽  
A. P. Mohamed ◽  
Saju Pillai
Keyword(s):  
Photonic Crystals ◽  
Band Gap ◽  
Photonic Band Gap ◽  
Band Gaps ◽  
Gap Effect ◽  
Photonic Band Gaps ◽  
Enhanced Fluorescence ◽  
Colloidal Photonic Crystals ◽  
Photonic Band ◽  
Guest Chemistry

Enhanced fluorescence was achieved by tuning the photonic band gaps in colloidal photonic crystals and host–guest chemistry.

Photonic band gap effect in layer-by-layer metallic photonic crystals

2003 ◽  
Vol 93 (1) ◽  
pp. 38-42 ◽  
Author(s):  
Zhi-Yuan Li ◽  
I. El-Kady ◽  
Kai-Ming Ho ◽  
S. Y. Lin ◽  
J. G. Fleming
Keyword(s):  
Photonic Crystals ◽  
Band Gap ◽  
Photonic Band Gap ◽  
Gap Effect ◽  
Layer By Layer ◽  
Metallic Photonic Crystals ◽  
Photonic Band

scholarly journals Phoamtonic designs yield sizeable 3D photonic band gaps

2019 ◽  
Vol 116 (47) ◽  
pp. 23480-23486 ◽  
Author(s):  
Michael A. Klatt ◽  
Paul J. Steinhardt ◽  
Salvatore Torquato
Keyword(s):  
Band Gap ◽  
Volume Fraction ◽  
Photonic Band Gap ◽  
Three Dimensional ◽  
Band Gaps ◽  
Photonic Band Gaps ◽  
Photonic Networks ◽  
Photonic Waveguides ◽  
High Degree ◽  
Photonic Band

We show that it is possible to construct foam-based heterostructures with complete photonic band gaps. Three-dimensional foams are promising candidates for the self-organization of large photonic networks with combinations of physical characteristics that may be useful for applications. The largest band gap found is based on 3D Weaire–Phelan foam, a structure that was originally introduced as a solution to the Kelvin problem of finding the 3D tessellation composed of equal-volume cells that has the least surface area. The photonic band gap has a maximal size of 16.9% (at a volume fraction of 21.6% for a dielectric contrast ε=13) and a high degree of isotropy, properties that are advantageous in designing photonic waveguides and circuits. We also present results for 2 other foam-based heterostructures based on Kelvin and C15 foams that have somewhat smaller but still significant band gaps.

Strong Photonic-Band-Gap Effect on the Spontaneous Emission in 3D Lead Halide Perovskite Photonic Crystals

ChemPhysChem ◽  
2018 ◽  
Vol 19 (16) ◽  
pp. 2101-2106 ◽  
Author(s):  
Xue Zhou ◽  
Mingzhu Li ◽  
Kang Wang ◽  
Huizeng Li ◽  
Yanan Li ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Band Gap ◽  
Spontaneous Emission ◽  
Photonic Band Gap ◽  
Gap Effect ◽  
Halide Perovskite ◽  
Photonic Band ◽  
Lead Halide

Modification of photonic crystals for obtaining common band gaps for TE and TM waves

2012 ◽  
Vol 90 (2) ◽  
pp. 175-180 ◽  
Author(s):  
M. Moghimi ◽  
S. Mirzakuchaki ◽  
N. Granpayeh ◽  
N. Nozhat ◽  
G.H. Darvish
Keyword(s):  
Photonic Crystals ◽  
Photonic Band Gap ◽  
Expansion Method ◽  
Band Gaps ◽  
Two Dimensional ◽  
Plane Wave Expansion ◽  
Photonic Band Gaps ◽  
Plane Wave Expansion Method ◽  
Common Band ◽  
Photonic Band

The band gaps of the two-dimensional photonic crystals, created by inhomogeneous triangular photonic crystal of variable central hexagonal holes are derived. The structure is made of air holes in GaAs. We present the best absolute photonic band gap for this structure by changing the holes’ radii. The photonic band gaps are calculated by the plane wave expansion method. The results indicate 95% overlap in the band gaps of both polarizations of TE and TM in triangular lattice.

Exploring Space Groups for Three Dimensional Photonic Band Gap Structures Via Level Set Equations: The Face Centered Cubic Lattice

2003 ◽  
Vol 788 ◽  
Author(s):  
Martin Maldovan ◽  
Chaitanya K. Ullal ◽  
Craig W. Carter ◽  
Edwin L. Thomas
Keyword(s):  
Band Gap ◽  
Level Set ◽  
Photonic Band Gap ◽  
Band Gaps ◽  
High Symmetry ◽  
Face Centered Cubic ◽  
Photonic Band Gaps ◽  
Basic Set ◽  
Face Centered ◽  
Photonic Band

ABSTRACTA level set approach was used to study photonic band gaps for dielectric composites with symmetries of the eleven face centered cubic lattices. Candidate structures were modeled for each group by a 3D surface given by f(x,y,z)-t=0 obtained by equating f to an appropriate sum of structure factor terms. This approach allows us to easily map different structures and gives us an insight into the effects of symmetry, connectivity and genus on photonic band gaps. It is seen that a basic set of symmetries defines the essential band gap and connectivity. The remaining symmetry elements modify the band gap. The eleven lattices are classified into four fundamental topologies on the basis of the occupancy of high symmetry Wyckoff sites. Of the fundamental topologies studied, three display band gaps--- including two: the (F-RD) and a group 216 structure that have not been reported previously.

Study on Band Gap Varying of Diamond Photonic Crystals by Fabricating to Bring the Error of Dielectric Volume Fraction

2014 ◽  
Vol 670-671 ◽  
pp. 101-104
Author(s):  
Shi Bin Chen ◽  
Yun Shi Yao ◽  
Xiao Hui Li ◽  
Min Jie Wang
Keyword(s):  
Photonic Crystals ◽  
Band Gap ◽  
Volume Fraction ◽  
Band Gaps ◽  
Band Width ◽  
Photonic Band Gaps ◽  
Frequency Range ◽  
Gel Casting ◽  
Diamond Crystals ◽  
Photonic Band

To avoid the effect of the error of dielectric volume fraction brought by fabricating process on band gap, the diamond crystals with different the error of dielectric volume fraction were designed and fabricated to investigate the fluctuation of band gaps. Theses photonic crystals with a diamond structure were fabricated using alumina by stereolithography, gel-casting and sintering. The photonic band gaps were observed along <100> direction and the photonic band gaps were formed in different frequency range. Increasing the radius from 4.2mm to 4.32mm and changing band width from 0.8 to 1.39GHz, the radius is increased by 2.86%, and corresponding band width increased by 73.75%. Therefore, the fabrication error in mold and fabrication process including injecting mold, sintering should be maintained under the same conditions, which can retain the error of band gap.

scholarly journals Photonic Band Gaps and Resonance Modes in 2D Twisted Moiré Photonic Crystal

Photonics ◽  
2021 ◽  
Vol 8 (10) ◽  
pp. 408
Author(s):  
Khadijah Alnasser ◽  
Steve Kamau ◽  
Noah Hurley ◽  
Jingbiao Cui ◽  
Yuankun Lin
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Photonic Band Gap ◽  
2D Materials ◽  
Band Gaps ◽  
Photonic Band Gaps ◽  
Resonance Modes ◽  
Optical Analog ◽  
Photonic Band ◽  
Dielectric Filling

The study of twisted bilayer 2D materials has revealed many interesting physics properties. A twisted moiré photonic crystal is an optical analog of twisted bilayer 2D materials. The optical properties in twisted photonic crystals have not yet been fully elucidated. In this paper, we generate 2D twisted moiré photonic crystals without physical rotation and simulate their photonic band gaps in photonic crystals formed at different twisted angles, different gradient levels, and different dielectric filling factors. At certain gradient levels, interface modes appear within the photonic band gap. The simulation reveals “tic tac toe”-like and “traffic circle”-like modes as well as ring resonance modes. These interesting discoveries in 2D twisted moiré photonic crystal may lead toward its application in integrated photonics.

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