Highly Efficient Broadband Wave Plates Using Dispersion-Engineered High-Index-Contrast Subwavelength Gratings

2019 ◽  
Vol 11 (6) ◽  
Author(s):  
Wenxing Liu ◽  
Tianbao Yu ◽  
Yong Sun ◽  
Zhenquan Lai ◽  
Qinghua Liao ◽  
...  
Keyword(s):  
High Index ◽  
Highly Efficient ◽  
Subwavelength Gratings ◽  
Index Contrast ◽  
High Index Contrast

OPTICAL GAIN AND ENERGY BAND STRUCTURE OF PHOTONIC CRYSTAL VCSELs WITH HIGH-INDEX-CONTRAST SUBWAVELENGTH GRATINGS

2014 ◽  
Vol 02 (02) ◽  
pp. 1440014
Author(s):  
J. CHEN ◽  
W. J. FAN ◽  
Q. J. WANG ◽  
MARCIN GEBSKI ◽  
MACIEJ DEMS ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Quantum Wells ◽  
Optical Gain ◽  
High Index ◽  
Cavity Surface ◽  
Subwavelength Gratings ◽  
Vertical Cavity Surface ◽  
Index Contrast ◽  
High Index Contrast ◽  
Valence Bands

Photonic crystal vertical-cavity surface-emitting laser structure with incorporation of high-index-contrast subwavelength gratings is fabricated and the three quantum well active region of the structure is investigated with 8 band k.p model. The dispersion of energy sub-bands and wave functions in the conduction bands and valence bands indicate that effective overlapping and interactions between electrons and holes can be realized in the quantum wells and that the maximum spontaneous emission rate and optical gain occurs at the expected wavelength, which is confirmed by the measured photoluminescence spectrum.

Silicon-based highly-efficient fiber-to-waveguide coupler for high index contrast systems

2006 ◽  
Vol 88 (8) ◽  
pp. 081112 ◽  
Author(s):  
Victor Nguyen ◽  
Trisha Montalbo ◽  
Christina Manolatou ◽  
Anu Agarwal ◽  
Ching-yin Hong ◽  
...  
Keyword(s):  
High Index ◽  
Waveguide Coupler ◽  
Highly Efficient ◽  
Index Contrast ◽  
High Index Contrast ◽  
Silicon Based

scholarly journals Experiment and Simulation of a Selective Subwavelength Filter with a Low Index Contrast

Nanomaterials ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1497 ◽  
Author(s):  
Tao Li ◽  
Mohamed Asbahii ◽  
Jian-Yee Lim ◽  
Hong Xie ◽  
Chan-Wai Koh ◽  
...  
Keyword(s):  
Scale Up ◽  
High Index ◽  
Large Area ◽  
Subwavelength Grating ◽  
Subwavelength Gratings ◽  
Multiple Orders ◽  
Index Contrast ◽  
Experiment And Simulation ◽  
High Index Contrast

Subwavelength gratings have been of great interest recently due to their ability to eliminate multiple orders. However, high index contrast ( Δ n ∼ 3 ) is typically achieved using metals or high-index dielectrics surrounded by vacuum in order to maintain good optical selectivity. Here, we theoretically propose and experimentally realize a selective subwavelength grating using an index contrast of Δ n ∼ 1.2 without vacuum. Despite its low index contrast, our simulation and experiments show that good optical selectivity is achieved using the same physics as subwavelength gratings made of high-index contrast. Such polymer-based encapsulated gratings are easier to scale up for use in large-area applications such as photovoltaics and lighting.

High Index-Contrast Silicon-On-Insulator Nanophotonics

2006 ◽  
Author(s):  
P. Bienstman ◽  
F. Laere ◽  
D. Taillaert ◽  
P. Dumon ◽  
W. Bogaerts ◽  
...  
Keyword(s):  
High Index ◽  
Silicon On Insulator ◽  
Index Contrast ◽  
High Index Contrast

scholarly journals Design of broadband highly reflective subwavelength high-index-contrast gratings in the visible regime

OSA Continuum ◽  
2020 ◽  
Vol 3 (5) ◽  
pp. 1232 ◽  
Author(s):  
Xingzhe Shi ◽  
Yuanfu Lu ◽  
Changshui Chen ◽  
Songhao Liu ◽  
Guangyuan Li
Keyword(s):  
High Index ◽  
Index Contrast ◽  
High Index Contrast

scholarly journals Efficient analysis of deep high-index-contrast gratings under arbitrary illumination

2015 ◽  
Vol 23 (26) ◽  
pp. 33472 ◽  
Author(s):  
Nojan Motamedi ◽  
Amir Shlivinski ◽  
Joseph E. Ford ◽  
Vitaliy Lomakin
Keyword(s):  
High Index ◽  
Index Contrast ◽  
High Index Contrast
Sign in / Sign up

Export Citation Format

Share Document