Far Field Detection of Different Elements Using Photonic Crystals

2017 ◽  
Vol 12 (4) ◽  
pp. 400-403 ◽  
Author(s):  
Simranjit Singh ◽  
Harmandeep Kaur ◽  
Kanwarpreet Singh
Keyword(s):  
Photonic Crystals ◽  
Far Field ◽  
Field Detection

scholarly journals Far-field detection of two-dimensional terahertz topological photonic crystals

2021 ◽  
Vol 51 (5) ◽  
pp. 054207
Author(s):  
Yi LIU ◽  
ShaoXian LI ◽  
WeiLi ZHANG ◽  
XieYu CHEN ◽  
JiaJun MA ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Far Field ◽  
Two Dimensional ◽  
Field Detection

scholarly journals Q-factor limits for far-field detection of whispering gallery modes in active microspheres

2015 ◽  
Vol 23 (22) ◽  
pp. 28896 ◽  
Author(s):  
Nicolas Riesen ◽  
Tess Reynolds ◽  
Alexandre François ◽  
Matthew R. Henderson ◽  
Tanya M. Monro
Keyword(s):  
Whispering Gallery Modes ◽  
Far Field ◽  
Q Factor ◽  
Field Detection ◽  
Whispering Gallery

scholarly journals Far-Field Focus and Dispersionless Anticrossing Bands in Two-Dimensional Photonic Crystals

2007 ◽  
Vol 2007 ◽  
pp. 1-8
Author(s):  
Xiaoshuang Chen ◽  
Renlong Zhou ◽  
Yong Zeng ◽  
Hongbo Chen ◽  
Wei Lu
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Negative Refraction ◽  
Far Field ◽  
Two Dimensional ◽  
Surface Polaritons ◽  
Concave Lens ◽  
Bloch Mode ◽  
Two Dimensional Photonic Crystal ◽  
Photonic Band

We review the simulation work for the far-field focus and dispersionless anticrossing bands in two-dimensional (2D) photonic crystals. In a two-dimensional photonic-crystal-based concave lens, the far-field focus of a plane wave is given by the distance between the focusing point and the lens. Strong and good-quality far-field focusing of a transmitted wave, explicitly following the well-known wave-beam negative refraction law, can be achieved. The spatial frequency information of the Bloch mode in multiple Brillouin zones (BZs) is investigated in order to indicate the wave propagation in two different regions. When considering the photonic transmission in a 2D photonic crystal composed of a negative phase-velocity medium (NPVM), it is shown that the dispersionless anticrossing bands are generated by the couplings among the localized surface polaritons of the NPVM rods. The photonic band structures of the NPVM photonic crystals are characterized by a topographical continuous dispersion relationship accompanied by many anticrossing bands.

scholarly journals NEGATIVE REFRACTION AND SUBWAVELENGTH FOCUSING USING PHOTONIC CRYSTALS

2004 ◽  
Vol 18 (25) ◽  
pp. 1275-1291 ◽  
Author(s):  
EKMEL OZBAY ◽  
KAAN GUVEN ◽  
ERTUGRUL CUBUKCU ◽  
KORAY AYDIN ◽  
B. KAMIL ALICI
Keyword(s):  
Optical Properties ◽  
Photonic Crystals ◽  
Negative Refraction ◽  
Numerical Study ◽  
Effective Index ◽  
Index Of Refraction ◽  
Far Field ◽  
Two Dimensional ◽  
Flat Lens ◽  
Effective Index Of Refraction

In this article, we present an experimental and numerical study of novel optical properties of two-dimensional dielectric photonic crystals (PCs) which exhibit negative refraction. We investigate two mechanisms which utilize the band structure of the PC to generate a negative effective index of refraction (n eff <0) and demonstrate the negative refraction experimentally. To the isotropic extend of n eff , different PC slab structures are employed to focus the radiation of a point source. It is shown experimentally that the PC can generate an image of the source with subwavelength resolution in the vicinity of the PC interface. Using a different PC, one can also obtain a far field focusing. In the latter case, we explicitly show the flat lens behavior of the structure. These examples indicate that PC-based lenses can surpass limitations of conventional lenses and lead to novel optics applications.

Far-Field Detection System of Laser Beams Alignment Based on Gratings Sampling and On-Axial Illumination

2009 ◽  
Vol 36 (5) ◽  
pp. 1101-1104 ◽  
Author(s):  
刘代中 Liu Daizhong ◽  
丁莉 Ding Li ◽  
高妍琦 Gao Yanqi ◽  
朱宝强 Zhu Baoqiang ◽  
朱俭 Zhu Jian ◽  
...  
Keyword(s):  
Detection System ◽  
Laser Beams ◽  
Far Field ◽  
Field Detection

scholarly journals Far-field of GaN film-transferred green light-emitting diodes with two-dimensional photonic crystals

2009 ◽  
Vol 17 (11) ◽  
pp. 8795 ◽  
Author(s):  
Chun-Feng Lai ◽  
Jim-Yong Chi ◽  
Hao-Chung Kuo ◽  
Hsi-Hsuan Yen ◽  
Chia-En Lee ◽  
...  
Keyword(s):  
Photonic Crystals ◽  
Light Emitting Diodes ◽  
Green Light ◽  
Far Field ◽  
Two Dimensional ◽  
Light Emitting ◽  
Gan Film

Numerical simulation study of transient electromagnetic far field detection logging

2020 ◽  
Author(s):  
Zhanshan Xiao ◽  
Haitao Hu ◽  
Rongxin Zhang ◽  
Qingjie Bai ◽  
Jianbin Zhao
Keyword(s):  
Numerical Simulation ◽  
Simulation Study ◽  
Far Field ◽  
Field Detection ◽  
Transient Electromagnetic
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