Design of AlOx/GaAs high-index contrast subwavelength gratings for 940nm VCSELs

2021 ◽  
Author(s):  
Yan Luo ◽  
Ling-Cheng Huang ◽  
Yong-Qin Hao
2014 ◽  
Vol 02 (02) ◽  
pp. 1440014
Author(s):  
J. CHEN ◽  
W. J. FAN ◽  
Q. J. WANG ◽  
MARCIN GEBSKI ◽  
MACIEJ DEMS ◽  
...  

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.


2019 ◽  
Vol 11 (6) ◽  
Author(s):  
Wenxing Liu ◽  
Tianbao Yu ◽  
Yong Sun ◽  
Zhenquan Lai ◽  
Qinghua Liao ◽  
...  

Nanomaterials ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1497 ◽  
Author(s):  
Tao Li ◽  
Mohamed Asbahii ◽  
Jian-Yee Lim ◽  
Hong Xie ◽  
Chan-Wai Koh ◽  
...  

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.


Author(s):  
P. Bienstman ◽  
F. Laere ◽  
D. Taillaert ◽  
P. Dumon ◽  
W. Bogaerts ◽  
...  

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

2015 ◽  
Vol 23 (26) ◽  
pp. 33472 ◽  
Author(s):  
Nojan Motamedi ◽  
Amir Shlivinski ◽  
Joseph E. Ford ◽  
Vitaliy Lomakin

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