Releasing the light field in subwavelength grating slot microring resonators for athermal and sensing applications

Nanoscale ◽  
2020 ◽  
Vol 12 (29) ◽  
pp. 15620-15630 ◽  
Author(s):  
Zhengsen Ruan ◽  
Nan Zhou ◽  
Shuang Zheng ◽  
Xiaoping Cao ◽  
Yun Long ◽  
...  
Keyword(s):  
Light Field ◽  
Microring Resonators ◽  
Subwavelength Grating ◽  
Sensing Applications

Subwavelength grating slot (SWGS) microring resonators on a silicon platform, releasing the light field out of the silicon region, show favorable performance in athermal and sensing applications.

Hybrid Chalcogenide-Silicon Subwavelength Grating Waveguides Microring Resonators

2021 ◽  
Author(s):  
Philippe Jean ◽  
Alexandre Douaud ◽  
Sophie LaRochelle ◽  
Younès Messaddeq ◽  
Wei Shi
Keyword(s):  
Microring Resonators ◽  
Subwavelength Grating

scholarly journals Vari-Focal Light Field Camera for Extended Depth of Field

Micromachines ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1453
Author(s):  
Hyun Myung Kim ◽  
Min Seok Kim ◽  
Sehui Chang ◽  
Jiseong Jeong ◽  
Hae-Gon Jeon ◽  
...  
Keyword(s):  
Light Field ◽  
High Reliability ◽  
Focal Length ◽  
Outdoor Environment ◽  
Depth Of Field ◽  
Depth Information ◽  
Single Shot ◽  
Depth Sensing ◽  
Depth Measurement ◽  
Sensing Applications

The light field camera provides a robust way to capture both spatial and angular information within a single shot. One of its important applications is in 3D depth sensing, which can extract depth information from the acquired scene. However, conventional light field cameras suffer from shallow depth of field (DoF). Here, a vari-focal light field camera (VF-LFC) with an extended DoF is newly proposed for mid-range 3D depth sensing applications. As a main lens of the system, a vari-focal lens with four different focal lengths is adopted to extend the DoF up to ~15 m. The focal length of the micro-lens array (MLA) is optimized by considering the DoF both in the image plane and in the object plane for each focal length. By dividing measurement regions with each focal length, depth estimation with high reliability is available within the entire DoF. The proposed VF-LFC is evaluated by the disparity data extracted from images with different distances. Moreover, the depth measurement in an outdoor environment demonstrates that our VF-LFC could be applied in various fields such as delivery robots, autonomous vehicles, and remote sensing drones.

scholarly journals Enhanced Sensitivity Subwavelength Grating Waveguides for Silicon Photonics Sensing Applications

2019 ◽  
Author(s):  
J. G. Wangüemert-Pérez ◽  
A. Hadij-ElHouati ◽  
A. Sánchez-Postigo ◽  
J. Leuermann ◽  
D. Pereira-Martín ◽  
...  
Keyword(s):  
Silicon Photonics ◽  
Subwavelength Grating ◽  
Enhanced Sensitivity ◽  
Sensing Applications

Antifouling coatings on SOI microring resonators for bio sensing applications

2016 ◽  
Vol 223 ◽  
pp. 400-405 ◽  
Author(s):  
Matthias Jäger ◽  
Tobias Becherer ◽  
Jürgen Bruns ◽  
Rainer Haag ◽  
Klaus Petermann
Keyword(s):  
Microring Resonators ◽  
Sensing Applications ◽  
Antifouling Coatings

scholarly journals Suspended silicon waveguide platform with subwavelength grating metamaterial cladding for long-wave infrared sensing applications

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Weixin Liu ◽  
Yiming Ma ◽  
Yuhua Chang ◽  
Bowei Dong ◽  
Jingxuan Wei ◽  
...  
Keyword(s):  
Wavelength Range ◽  
Optical Sensors ◽  
High Performance ◽  
Limit Of Detection ◽  
Propagation Loss ◽  
Strong Light ◽  
Subwavelength Grating ◽  
Sensing Applications ◽  
Long Wave ◽  
Long Wave Infrared

Abstract Long-wave infrared (LWIR, 6–14 µm) processes enormous potential for chem/biosensing as it covers abundant molecular absorption fingerprints. Waveguides provide an attractive chip-scale miniaturization solution for optical sensors. However, the exploration of waveguide sensors in this wavelength range is limited. Here, an LWIR photonic platform for fast and sensitive on-chip gas sensing is developed using suspended silicon (Si) waveguide supported by subwavelength grating (SWG) metamaterial claddings. This platform provides a viable approach to fully exploit the transparency window of Si. The SWG structure provides a promising solution to engineer the mode profile for strong light–analyte interaction. Propagation loss and bending loss are studied in the broad wavelength range of 6.4–6.8 µm. Functional devices including grating couplers, Y-junctions, and directional couplers are also demonstrated with high performance. Sensing demonstration based on our platform is presented using toluene vapor detection as an example. The corresponding limit of detection reaches 75 ppm. The response and recovery time to 75 ppm toluene are about 0.8 and 3.4 s, respectively. This good performance makes our platform a promising candidate for on-site medical and environmental applications.

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