scholarly journals Design and Simulation Investigation of Si3N4 Photonics Circuits for Wideband On-Chip Optical Gas Sensing around 2 µm Optical Wavelength

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2513
Author(s):  
Natnicha Koompai ◽  
Papichaya Chaisakul ◽  
Pichet Limsuwan ◽  
Xavier Le Roux ◽  
Laurent Vivien ◽  
...  
Keyword(s):  
Spectral Range ◽  
Gas Sensing ◽  
Slot Waveguide ◽  
Optical Coupling ◽  
Optical Wavelength ◽  
Light Coupling ◽  
Strip Waveguide ◽  
Optical Gas Sensing ◽  
On Chip ◽  
Multi Mode

We theoretically explore the potential of Si3N4 on SiO2 waveguide platform toward a wideband spectroscopic detection around the optical wavelength of 2 μm. The design of Si3N4 on SiO2 waveguide architectures consisting of a Si3N4 slot waveguide for a wideband on-chip spectroscopic sensing around 2 μm, and a Si3N4 multi-mode interferometer (MMI)-based coupler for light coupling from classical strip waveguide into the identified Si3N4 slot waveguides over a wide spectral range are investigated. We found that a Si3N4 on SiO2 slot waveguide structure can be designed for using as optical interaction part over a spectral range of interest, and the MMI structure can be used to enable broadband optical coupling from a strip to the slot waveguide for wideband multi-gas on-chip spectroscopic sensing. Reasons for the operating spectral range of the system are discussed.

scholarly journals On-Chip Narrowband Thermal Emitter for Mid-IR Optical Gas Sensing

ACS Photonics ◽  
2017 ◽  
Vol 4 (6) ◽  
pp. 1371-1380 ◽  
Author(s):  
Alexander Lochbaum ◽  
Yuriy Fedoryshyn ◽  
Alexander Dorodnyy ◽  
Ueli Koch ◽  
Christian Hafner ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Thermal Emitter ◽  
Optical Gas Sensing ◽  
On Chip

scholarly journals Polarization Beam Splitter Based on Si3N4/SiO2 Horizontal Slot Waveguides for On-Chip High-Power Applications

Sensors ◽  
2020 ◽  
Vol 20 (10) ◽  
pp. 2862 ◽  
Author(s):  
Yuxi Fang ◽  
Changjing Bao ◽  
Zhonghan Wang ◽  
Yange Liu ◽  
Lin Zhang ◽  
...  
Keyword(s):  
Power Systems ◽  
High Power ◽  
Beam Splitter ◽  
Polarization Beam Splitter ◽  
Length Ratio ◽  
Coupling Length ◽  
Slot Waveguide ◽  
Strip Waveguide ◽  
On Chip ◽  
Fabrication Tolerance

In this paper, we propose an Si3N4/SiO2 horizontal-slot-waveguide-based polarization beam splitter (PBS) with low nonlinearity for on-chip high-power systems. The coupling length ratio between the quasi-TE and quasi-TM modes (LTE/LTM) was optimized to 2 for an efficient polarization splitting. For the single-slot design, the coupling length of the PBS was 281.5 μm, while the extinction ratios (ER) of the quasi-TM and quasi-TE modes were 23.9 dB and 20.8 dB, respectively. Compared to PBS based on the Si3N4 strip waveguide, the coupling length became 22.6% shorter. The proposed PBSs also had a relatively good fabrication tolerance for an ER of >20 dB. For the multi-slot design, the coupling length of the PBS was 290.3 μm, while the corresponding ER of the two polarizations were 24.0 dB and 21.0 dB, respectively. Furthermore, we investigated the tradeoff between the ER and coupling length for the optimized PBSs with single slot or multiple slots.

scholarly journals On-chip octave-spanning supercontinuum generation in hybrid slot waveguide by power-efficient dual pump

2021 ◽  
pp. 104195
Author(s):  
Kangzhu Zhou ◽  
Qian Li ◽  
Zhe Kang ◽  
Jiayao Huang ◽  
P.K.A. Wai
Keyword(s):  
Supercontinuum Generation ◽  
Slot Waveguide ◽  
Power Efficient ◽  
On Chip

scholarly journals Design of a Dual-Mode Graphene-on-Microring Resonator for Optical Gas Sensing

IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 56479-56485
Author(s):  
Jiaqi Wang ◽  
Xinying Zhang ◽  
Zhiwei Wei ◽  
Huabin Qiu ◽  
Yuzhi Chen ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Microring Resonator ◽  
Dual Mode ◽  
Optical Gas Sensing

All-nanoparticle layer-by-layer coatings for Mid-IR on-chip gas sensing

2020 ◽  
Vol 56 (91) ◽  
pp. 14283-14286
Author(s):  
Diana Al Husseini ◽  
Junchao Zhou ◽  
Daniel Willhelm ◽  
Trevor Hastings ◽  
Gregory S. Day ◽  
...  
Keyword(s):  
Optical Waveguides ◽  
Gas Sensing ◽  
Layer By Layer ◽  
Precise Control ◽  
Nanoparticle Layer ◽  
Withdrawal Speed ◽  
Layer Deposition ◽  
Nanoparticle Coatings ◽  
On Chip

Functionalization of optical waveguides with submicron all-nanoparticle coatings significantly enhanced the detection of acetone. Such coatings were enabled via precise control of the substrate withdrawal speed using the layer-by-layer deposition.

Optical gas sensing using Langmuir-Blodgett films

1995 ◽  
Vol 3 (3-4) ◽  
pp. 257-262 ◽  
Author(s):  
L.S. Miller ◽  
A.M. McRoberts ◽  
D.J. Walton ◽  
D.A. Parry ◽  
A.L. Newton
Keyword(s):  
Gas Sensing ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films ◽  
Optical Gas Sensing

On-Chip Micro–Electro–Mechanical System Fourier Transform Infrared (MEMS FT-IR) Spectrometer-Based Gas Sensing

2016 ◽  
Vol 70 (5) ◽  
pp. 897-904 ◽  
Author(s):  
Mazen Erfan ◽  
Yasser M Sabry ◽  
Mohammad Sakr ◽  
Bassem Mortada ◽  
Mostafa Medhat ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Mechanical System ◽  
Gas Sensing ◽  
Fourier Transform Infrared ◽  
Micro Electro Mechanical System ◽  
Ft Ir ◽  
On Chip

On-chip methane sensing by near-IR absorption signatures in a photonic crystal slot waveguide

2011 ◽  
Vol 36 (6) ◽  
pp. 984 ◽  
Author(s):  
Wei-Cheng Lai ◽  
Swapnajit Chakravarty ◽  
Xiaolong Wang ◽  
Cheyun Lin ◽  
Ray T. Chen
Keyword(s):  
Photonic Crystal ◽  
Slot Waveguide ◽  
Ir Absorption ◽  
Near Ir ◽  
On Chip

On-chip tunable multi-mode interference reflector

2018 ◽  
Vol 51 (49) ◽  
pp. 495101
Author(s):  
Fengxin Dong ◽  
Anjin Liu ◽  
Pijie Ma ◽  
Wanhua Zheng
Keyword(s):  
On Chip ◽  
Multi Mode ◽  
Mode Interference
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