scholarly journals Lithographic Mask Defects Analysis on an MMI 3 dB Splitter

Photonics ◽  
2019 ◽  
Vol 6 (4) ◽  
pp. 118 ◽  
Author(s):  
Paulo Lourenço ◽  
Alessandro Fantoni ◽  
João Costa ◽  
Manuela Vieira

In this paper, we present a simulation study that intends to characterize the influence of defects introduced by manufacturing processes on the geometry of a semiconductor structure suitable to be used as a multimode interference (MMI) 3 dB power splitter. Consequently, these defects will represent refractive index fluctuations which, on their turn, will drastically affect the propagation conditions within the structure. Our simulations were conducted on a software platform that implements the Beam Propagation numerical method. This work supports the development of a biomedical plasmonic sensor, which is based on the coupling between propagating modes in a dielectric waveguide and the surface plasmon mode that is generated on an overlaid metallic thin film, and where the output readout is achieved through an a-Si:H photodiode. By using a multimode interference 1 × 2 power splitter, this sensor device can utilize the non-sensing arm as a reference one, greatly facilitating its calibration and enhancing its performance. As the spectral sensitivity of amorphous silicon is restricted to the visible range, this sensing device should be operating on a wavelength not higher than 700 nm; thus, a-SiNx has been the material hereby proposed for both waveguides and MMI power splitter.

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1164
Author(s):  
Gongli Xiao ◽  
Yanping Xu ◽  
Hongyan Yang ◽  
Zetao Ou ◽  
Jianyun Chen ◽  
...  

Herein, we propose a tunable plasmonic sensor with Fano resonators in an inverted U-shaped resonator. By manipulating the sharp asymmetric Fano resonance peaks, a high-sensitivity refractive index sensor can be realized. Using the multimode interference coupled-mode theory and the finite element method, we numerically simulate the influences of geometrical parameters on the plasmonic sensor. Optimizing the structure parameters, we can achieve a high plasmonic sensor with the maximum sensitivity for 840 nm/RIUand figure of merit for 3.9 × 105. The research results provide a reliable theoretical basis for designing high sensitivity to the next generation plasmonic nanosensor.


2021 ◽  
Vol 41 (7) ◽  
pp. 0713001
Author(s):  
汪静丽 Wang Jingli ◽  
皇甫利国 Huangfu Liguo ◽  
陈鹤鸣 Chen Heming

2004 ◽  
Vol 22 (12) ◽  
pp. 2842-2846 ◽  
Author(s):  
T. Liu ◽  
A.R. Zakharian ◽  
M. Fallahi ◽  
J.V. Moloney ◽  
M. Mansuripur

2021 ◽  
Author(s):  
Giles Allison ◽  
Amrita Sana ◽  
Yuta Ogawa ◽  
Hidemi Kato ◽  
Kosei Ueno ◽  
...  

Abstract Surface plasmon resonance (SPR) is a well-established technology for real-time highly sensitive label-free detection and measurement of binding kinetics between biological samples. A common drawback, however, of SPR detection is the necessity for far field angular resolved measurement of specular reflection, which increases the size as well as requiring precise calibration of the optical apparatus. Here we present an alternative optoelectronic approach in which the plasmonic sensor is integrated within a photovoltaic cell. Incident light generates an electronic signal that is sensitive to the refractive index (RI) of a solution via interaction with the plasmon. The photogenerated current is enhanced due to the coupling of the plasmon mode with Fabry-Pérot (FP) modes in the absorbing layer of the photovoltaic cell. The near field electrical detection of SPR we demonstrate will enable a new generation of cheap, compact and high throughput biosensors.


2020 ◽  
Vol 32 (14) ◽  
pp. 883-886 ◽  
Author(s):  
Renfu Liu ◽  
Longhui Lu ◽  
Peijie Zhang ◽  
Weijie Chang ◽  
Deming Liu ◽  
...  

2019 ◽  
Vol 37 (13) ◽  
pp. 3000-3008 ◽  
Author(s):  
Yuanhang Zhang ◽  
Mohammed A. Al-Mumin ◽  
Huiyuan Liu ◽  
Chi Xu ◽  
Lin Zhang ◽  
...  

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