scholarly journals Mid-infrared large-angle high-efficiency retroreflector based on subwavelenght metallic metagrating

2020 ◽  
Vol 69 (1) ◽  
pp. 014211
Author(s):  
Mei-Ou Wang ◽  
Qian Xiao ◽  
Xia Jin ◽  
Yan-Yan Cao ◽  
Ya-Dong Xu
Keyword(s):  
High Efficiency ◽  
Large Angle ◽  
Mid Infrared

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.

Rectangular dielectric metagrating for high-efficiency diffraction with large-angle deflection

2020 ◽  
Vol 18 (7) ◽  
pp. 073601
Author(s):  
Weiyi Shi ◽  
Weimin Deng ◽  
Weinan Liu ◽  
Zepeng Zhuang ◽  
Zhibin Fan ◽  
...  
Keyword(s):  
High Efficiency ◽  
Large Angle

scholarly journals Ultra High-efficiency Integrated Mid Infrared to Visible Up-conversion System

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Aytak Motmaen ◽  
Ali Rostami ◽  
Samiye Matloub
Keyword(s):  
High Efficiency ◽  
Mid Infrared ◽  
Conversion System

scholarly journals Diffractive Optical Elements with a Large Angle of Operation Recorded in Acrylamide Based Photopolymer on Flexible Substrates

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Hoda Akbari ◽  
Izabela Naydenova ◽  
Lina Persechini ◽  
Sean M. Garner ◽  
Pat Cimo ◽  
...  
Keyword(s):  
Spatial Frequency ◽  
High Efficiency ◽  
Large Angle ◽  
Optical Recording ◽  
Holographic Recording ◽  
Angular Range ◽  
Optical Elements ◽  
Lens Element ◽  
Single Lens ◽  
Exposure Energy

A holographic device characterised by a large angular range of operation is under development. The aim of this study is to increase the angular working range of the diffractive lens by stacking three layers of high efficiency optical elements on top of each other so that light is collected (and focussed) from a broader range of angles. The angular range of each individual lens element is important, and work has already been done in an acrylamide-based photosensitive polymer to broaden the angular range of individual elements using holographic recording at a low spatial frequency. This paper reports new results on the angular selectivity of stacked diffractive lenses. A working range of 12° is achieved. The diffractive focussing elements were recorded holographically with a central spatial frequency of 300 l/mm using exposure energy of 60 mJ/cm2at a range of recording angles. At this spatial frequency with layers of thickness 50 ± 5 µm, a diffraction efficiency of 80% and 50% was achieved in the single lens element and combined device, respectively. The optical recording process and the properties of the multilayer structure are described and discussed. Holographic recording of a single lens element is also successfully demonstrated on a flexible glass substrate (Corning(R) Willow(R) Glass) for the first time.

scholarly journals High-efficiency large-angle Pancharatnam phase deflector based on dual-twist design

2017 ◽  
Vol 25 (6) ◽  
pp. 6283 ◽  
Author(s):  
Kun Gao ◽  
Colin McGinty ◽  
Harold Payson ◽  
Shaun Berry ◽  
Joseph Vornehm ◽  
...  
Keyword(s):  
High Efficiency ◽  
Large Angle ◽  
Pancharatnam Phase

TUNABLE MID-INFRARED SOURCES USING SECOND-ORDER NONLINEARITIES

1992 ◽  
Vol 01 (03) ◽  
pp. 639-672 ◽  
Author(s):  
NORMAN P. BARNES
Keyword(s):  
Solid State ◽  
Near Infrared ◽  
High Efficiency ◽  
Nonlinear Crystal ◽  
Second Order ◽  
Solid State Lasers ◽  
Mid Infrared ◽  
Crystal Properties ◽  
Efficiency Performance ◽  
Infrared Sources

Tunable mid-infrared sources can be created using crystals having second-order non-linearities and solid-state lasers operating in the near infrared. Such devices have already demonstrated large tuning ranges and high efficiency. Performance of these devices as well as their potential for higher output energies and narrow spectral bandwidth operation are analyzed in terms of nonlinear crystal properties and solid-state laser requirements.

scholarly journals Large-angle and high-efficiency tunable phase grating using fringe field switching liquid crystal

2015 ◽  
Vol 23 (9) ◽  
pp. 12274 ◽  
Author(s):  
Daming Xu ◽  
Guanjun Tan ◽  
Shin-Tson Wu
Keyword(s):  
Liquid Crystal ◽  
High Efficiency ◽  
Large Angle ◽  
Fringe Field ◽  
Phase Grating
Sign in / Sign up

Export Citation Format

Share Document