scholarly journals A tunable polarization-sensitive, long-wave infrared MDM subwavelength grating structure with wide-angle, narrow-band, and high absorption

2021 ◽  
Author(s):  
Liu Zhang ◽  
zheng yan ◽  
JIN ZHANG ◽  
yi yin ◽  
Qian-Kun Li ◽  
...  
Keyword(s):  
Narrow Band ◽  
Wide Angle ◽  
Subwavelength Grating ◽  
Grating Structure ◽  
Long Wave ◽  
Long Wave Infrared ◽  
High Absorption

Corners positioning for binocular ultra-wide angle long-wave infrared camera calibration

Optik ◽  
2020 ◽  
Vol 206 ◽  
pp. 163441
Author(s):  
Ziang Wang ◽  
Bingqi Liu ◽  
Fuyu Huang ◽  
Yichao Chen ◽  
Shuai Zhang ◽  
...  
Keyword(s):  
Camera Calibration ◽  
Infrared Camera ◽  
Wide Angle ◽  
Long Wave ◽  
Long Wave Infrared

Application of chalcogenide glass in designing a long-wave infrared athermalized continuous zoom wide-angle lens

2018 ◽  
Vol 47 (3) ◽  
pp. 321001
Author(s):  
王静 Wang Jing ◽  
吴越豪 Wu Yuehao ◽  
戴世勋 Dai Shixun ◽  
徐铁峰 Xu Tiefeng ◽  
木锐 Mu Rui
Keyword(s):  
Chalcogenide Glass ◽  
Wide Angle ◽  
Long Wave ◽  
Wide Angle Lens ◽  
Long Wave Infrared

High absorption long wave infrared superlattices using metamorphic buffers

2017 ◽  
Vol 110 (18) ◽  
pp. 181107 ◽  
Author(s):  
Chaffra A. Affouda ◽  
Stephanie Tomasulo ◽  
Jill A. Nolde ◽  
Igor Vurgaftman ◽  
Nadeemullah A. Mahadik ◽  
...  
Keyword(s):  
Long Wave ◽  
Metamorphic Buffers ◽  
Long Wave Infrared ◽  
High Absorption

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.

RxCADRE 2008: Wildfire Airborne Sensor Program - Lite uncalibrated long wave infrared image mosaics

2016 ◽  
Author(s):  
Andrew T. Hudak ◽  
Benjamin C. Bright ◽  
Robert L. Kremens ◽  
Matthew B. Dickinson ◽  
Matthew G. Alden
Keyword(s):  
Infrared Image ◽  
Long Wave ◽  
Long Wave Infrared

scholarly journals A Bi-Spectral Microbolometer Sensor for Wildfire Measurement

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3690
Author(s):  
Denis Dufour ◽  
Loïc Le Noc ◽  
Bruno Tremblay ◽  
Mathieu N. Tremblay ◽  
Francis Généreux ◽  
...  
Keyword(s):  
Low Resource ◽  
Long Wave ◽  
Radiative Power ◽  
Infrared Radiances ◽  
Moderate Scale ◽  
Long Wave Infrared ◽  
Detector Type ◽  
Experimental Burns ◽  
Fire Radiative Power

This study describes the development of a prototype bi-spectral microbolometer sensor system designed explicitly for radiometric measurement and characterization of wildfire mid- and long-wave infrared radiances. The system is tested experimentally over moderate-scale experimental burns coincident with FLIR reference imagery. Statistical comparison of the fire radiative power (FRP; W) retrievals suggest that this novel system is highly reliable for use in collecting radiometric measurements of biomass burning. As such, this study provides clear experimental evidence that mid-wave infrared microbolometers are capable of collecting FRP measurements. Furthermore, given the low resource nature of this detector type, it presents a suitable option for monitoring wildfire behaviour from low resource platforms such as unmanned aerial vehicles (UAVs) or nanosats.

Long-wave infrared sub-monolayer quantum dot quantum cascade photodetector

2020 ◽  
pp. 1-1
Author(s):  
Zhijian Shen ◽  
Zhuo Deng ◽  
Xuyi Zhao ◽  
Jian Huang ◽  
Lu Yao ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Quantum Cascade ◽  
Long Wave ◽  
Long Wave Infrared

Reflective waveplate with subwavelength grating structure

2015 ◽  
Vol 54 (9) ◽  
pp. 092203 ◽  
Author(s):  
Itsunari Yamada ◽  
Takaaki Ishihara ◽  
Junichi Yanagisawa
Keyword(s):  
Subwavelength Grating ◽  
Grating Structure
Sign in / Sign up

Export Citation Format

Share Document