Photonic crystal structure with square symmetry within each layer and a three-dimensional band gap

2003 ◽  
Vol 82 (22) ◽  
pp. 3835-3837 ◽  
Author(s):  
David Roundy ◽  
John Joannopoulos
Keyword(s):  
Crystal Structure ◽  
Photonic Crystal ◽  
Band Gap ◽  
Three Dimensional ◽  
Photonic Crystal Structure

scholarly journals Cuticle network and orientation preference of photonic crystals in the scales of the weevil Lamprocyphus augustus

2018 ◽  
Vol 15 (145) ◽  
pp. 20180360 ◽  
Author(s):  
R. Ebihara ◽  
H. Hashimoto ◽  
J. Kano ◽  
T. Fujii ◽  
S. Yoshioka
Keyword(s):  
Crystal Structure ◽  
Photonic Crystal ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Three Dimensional ◽  
Unit Cell ◽  
Photonic Crystal Structure ◽  
Dimensional Structure ◽  
Microscopy Imaging ◽  
Photonic Band

This paper reports the structural and optical investigations of the structural colour of the weevil Lamprocyphus augustus . The photonic crystal structure within the weevil's scales was investigated using sequential focused ion-beam milling and scanning electron microscopy imaging. We carefully analysed the reconstructed three-dimensional structure to determine the unit cell of the photonic crystal. It was found that the cuticle network of the cubic unit cell perfectly matches the previously reported diamond-based network. However, different results were obtained for the crystal orientations of the small crystal domains that comprise the entire photonic crystal structure in the scales: <111> directions are highly preferred along the surface normal of the scale. This finding explains the fact that the scale is almost uniformly coloured despite the multi-domain structure. It is confirmed experimentally and theoretically that the wavelength range of the reflection band corresponds to the gap of the photonic band.

scholarly journals Simulation Studies on Semiconductor Photonic Crystal Using Photonic Bandgap Analysis: A Realization of Optical Mirror

2016 ◽  
Vol 10 (1) ◽  
pp. 150-155
Author(s):  
C. Nayak ◽  
P. Sarkar ◽  
G. Palai
Keyword(s):  
Crystal Structure ◽  
Photonic Crystal ◽  
Band Gap ◽  
Lattice Spacing ◽  
Photonic Bandgap ◽  
Photonic Band Gap ◽  
Expansion Method ◽  
Photonic Crystal Structure ◽  
Photonic Band ◽  
Air Hole

In this research, we attempt to envisage the mirror application using semiconductor photonic crystal with the help of photonic bandgap analysis. The photonic bandgap of photonic crystal structure is simulated using plane wave expansion method, where photonic crystal is realized by 2D triangular photonic crystal structure with gallium arsenide as background material having periodic air holes. Simulation result revealed that both lattice spacing of crystal structure and radius of air holes play vital role in realizing optical mirror. It is observed that photonic band gap of the above structure is found, if radius of air hole varies from 16 nm to 50 nm for lattice constant of 100 nm . It is also seen that photonic band gap is found if lattice spacing varies from 200 nm to 650 nm for radius of air hole of 100 nm.

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