On the control of optical confinement in sheath helix-loaded elliptical dielectric guide

2014 ◽  
Vol 61 (18) ◽  
pp. 1509-1518 ◽  
Author(s):  
Masih Ghasemi ◽  
P.K. Choudhury
Keyword(s):  
Optical Confinement ◽  
Dielectric Guide

scholarly journals Focused Patterning of Electrospun Nanofibers Using a Dielectric Guide Structure

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1505
Author(s):  
Byeongjun Lee ◽  
Younghyeon Song ◽  
Chan Park ◽  
Jungmin Kim ◽  
Jeongbeom Kang ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Finite Elements ◽  
Electric Field ◽  
Electrospun Nanofibers ◽  
Electrospun Fibers ◽  
Continuous Line ◽  
Key Factors ◽  
Key Technology ◽  
Vertical Electric Field ◽  
Dielectric Guide

The patterning of electrospun fibers is a key technology applicable to various fields. This study reports a novel focused patterning method for electrospun nanofibers that uses a cylindrical dielectric guide. The finite elements method (FEM) was used to analyze the electric field focusing phenomenon and ground its explanation in established theory. The horizontal and vertical electric field strengths in the simulation are shown to be key factors in determining the spatial distribution of nanofibers. The experimental results demonstrate a relationship between the size of the cylindrical dielectric guide and that of the electrospun area accumulated in the collector. By concentrating the electric field, we were able to fabricate a pattern of less than 6 mm. The demonstration of continuous line and square patterning shows that the electrospun area can be well controlled. This novel patterning method can be used in a variety of applications, such as sensors, biomedical devices, batteries, and composites.

Measurement of optical loss variation on thickness of InGaN optical confinement layers of blue-violet-emitting laser diodes

2008 ◽  
Vol 103 (10) ◽  
pp. 103101 ◽  
Author(s):  
J. K. Son ◽  
S. N. Lee ◽  
H. S. Paek ◽  
T. Sakong ◽  
H. K. Kim ◽  
...  
Keyword(s):  
Laser Diodes ◽  
Optical Loss ◽  
Optical Confinement

GaAs/AlGaAs single‐mode optical waveguides with low propagation loss and strong optical confinement

1990 ◽  
Vol 56 (11) ◽  
pp. 990-992 ◽  
Author(s):  
M. Seto ◽  
A. Shahar ◽  
R. J. Deri ◽  
W. J. Tomlinson ◽  
A. Yi‐Yan
Keyword(s):  
Optical Waveguides ◽  
Single Mode ◽  
Propagation Loss ◽  
Optical Confinement

scholarly journals Elongated-Hexagonal Photonic Crystal for Buffering, Sensing, and Modulation

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 809
Author(s):  
Sayed Elshahat ◽  
Israa Abood ◽  
Zixian Liang ◽  
Jihong Pei ◽  
Zhengbiao Ouyang
Keyword(s):  
Photonic Crystal ◽  
Irregular Waveguide ◽  
Optical Confinement ◽  
Physical Size ◽  
External Voltage ◽  
Dynamic Modulation ◽  
Highly Sensitive ◽  
Matter Interaction ◽  
Light Matter Interaction ◽  
Higher Sensitivity

A paradigm for high buffering performance with an essential fulfillment for sensing and modulation was set forth. Through substituting the fundamental two rows of air holes in an elongated hexagonal photonic crystal (E-PhC) by one row of the triangular gaps, the EPCW is molded to form an irregular waveguide. By properly adjusting the triangle dimension solitary, we fulfilled the lowest favorable value of the physical-size of each stored bit by about μ5.5510 μm. Besides, the EPCW is highly sensitive to refractive index (RI) perturbation attributed to the medium through infiltrating the triangular gaps inside the EPCW by microfluid with high RI sensitivity of about 379.87 nm/RIU. Furthermore, dynamic modulation can be achieved by applying external voltage and high electro-optical (EO) sensitivity is obtained of about 748.407 nm/RIU. The higher sensitivity is attributable to strong optical confinement in the waveguide region and enhanced light-matter interaction in the region of the microfluid triangular gaps inside the EPCW and conventional gaps (air holes). The EPCW structure enhances the interaction between the light and the sensing medium.

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