A subwavelength structured multimode interference coupler for the 3-4 micrometers mid-infrared band

2015 ◽  
Author(s):  
Alejandro Sánchez-Postigo ◽  
Juan Gonzalo Wangüemert-Pérez ◽  
Robert Halir ◽  
Alejandro Ortega-Moñux ◽  
Carlos A. Alonso-Ramos ◽  
...  
Keyword(s):  
Multimode Interference ◽  
Infrared Band ◽  
Mid Infrared ◽  
Multimode Interference Coupler

scholarly journals A broadband 2×2 multimode interference coupler for mid-infrared wavelengths

2021 ◽  
Author(s):  
Callum Stirling ◽  
Robert Halir ◽  
Alejandro Sánchez-Postigo ◽  
Zhibo Qu ◽  
Jamie Reynolds ◽  
...  
Keyword(s):  
Multimode Interference ◽  
Mid Infrared ◽  
Multimode Interference Coupler ◽  
Infrared Wavelengths

scholarly journals Fabrication tolerant chalcogenide mid-infrared multimode interference coupler design with applications for Bracewell nulling interferometry

2017 ◽  
Vol 25 (4) ◽  
pp. 3038 ◽  
Author(s):  
Harry-Dean Kenchington Goldsmith ◽  
Nick Cvetojevic ◽  
Michael Ireland ◽  
Stephen Madden
Keyword(s):  
Multimode Interference ◽  
Mid Infrared ◽  
Nulling Interferometry ◽  
Multimode Interference Coupler

scholarly journals High-Efficiency Spin-Related Vortex Metalenses

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1485
Author(s):  
Wei Wang ◽  
Ruikang Zhao ◽  
Shilong Chang ◽  
Jing Li ◽  
Yan Shi ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Topological Charge ◽  
High Efficiency ◽  
Infrared Band ◽  
Mid Infrared ◽  
Integrated Devices ◽  
Vortex Beams ◽  
Topological Charges

In this paper, one spin-selected vortex metalens composed of silicon nanobricks is designed and numerically investigated at the mid-infrared band, which can produce vortex beams with different topological charges and achieve different spin lights simultaneously. Another type of spin-independent vortex metalens is also designed, which can focus the vortex beams with the same topological charge at the same position for different spin lights, respectively. Both of the two vortex metalenses can achieve high-efficiency focusing for different spin lights. In addition, the spin-to-orbital angular momentum conversion through the vortex metalens is also discussed in detail. Our work facilitates the establishment of high-efficiency spin-related integrated devices, which is significant for the development of vortex optics and spin optics.

A four-state programmable mid-infrared band-stop filter exploiting a Ge2Sb2Te5 film and VO2 nanoparticles

2021 ◽  
Vol 119 (14) ◽  
pp. 141109
Author(s):  
Yun Meng ◽  
Dan Li ◽  
Chong Zhang ◽  
Yang Wang ◽  
Robert E. Simpson ◽  
...  
Keyword(s):  
Infrared Band ◽  
Mid Infrared ◽  
Band Stop Filter

scholarly journals Study on a calculation model of infrared radiation characteristics of rocket engine plume

2021 ◽  
Vol 2125 (1) ◽  
pp. 012006
Author(s):  
Nan Wu ◽  
Chengpo Mu ◽  
Yang He ◽  
Huan Liu ◽  
Taiye Liu
Keyword(s):  
Flow Field ◽  
Infrared Radiation ◽  
Rocket Engine ◽  
Calculation Model ◽  
Characteristic Parameters ◽  
Infrared Band ◽  
Radiation Characteristics ◽  
Mid Infrared ◽  
Fast Calculation ◽  
Plume Flow

Abstract In order to study the infrared radiation (IR) characteristics of rocket engine plume in the mid infrared band, a calculation model for IR transfer of rocket engine plume was built. The flow field data are calculated by software FLUENT. Based on HITRAN database, the IR characteristic parameters are calculated after spectral line correction. The Line of Sight (LoS) is used to solve the radiation characteristics in the plume flow field, and the IR characteristics distribution of the plume in the mid infrared band is obtained, which agree well with the results from open literature. The method has the advantages of simple model, less parameters and fast calculation speed in this paper.

scholarly journals Polymer-Based Microring Resonator with the Multimode Interference Coupler Operating at Very-Near-Infrared Wavelengths

2019 ◽  
Vol 9 (13) ◽  
pp. 2715 ◽  
Author(s):  
Huanlin Lv ◽  
Yuxin Liang ◽  
Zhenlin Wu ◽  
Xiuyou Han ◽  
Geert Morthier ◽  
...  
Keyword(s):  
Near Infrared ◽  
High Potential ◽  
Microring Resonator ◽  
Multimode Interference ◽  
Q Factor ◽  
Fluorinated Polymer ◽  
Sensing Applications ◽  
Soft Mold ◽  
Multimode Interference Coupler ◽  
Infrared Wavelengths

A microring resonator with the multimode interference coupler is fabricated on the polymer platform by using UV-based soft nanoimprint technique. A unique class of fluorinated polymer, perfluoropolyether (PFPE), is employed for the fabrication of the flexible soft mold. By optimizing the proportion between Ormocore and the thinner maT, the microring resonator is fabricated almost without residual layer. The fabricated device with a Q-factor up to 2.3 × 104 is demonstrated for very-near-infrared wavelengths, which shows high potential for sensing applications.

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