High efficiency quasi-ternary design for nonmechanical beam-steering utilizing polarization gratings

2010 ◽  
Author(s):  
Jihwan Kim ◽  
Matthew N. Miskiewicz ◽  
Steve Serati ◽  
Michael J. Escuti
Keyword(s):  
High Efficiency ◽  
Beam Steering ◽  
Polarization Gratings

scholarly journals Non-Mechanical Beam Steering with Polarization Gratings: A Review

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 361
Author(s):  
Christopher Hoy ◽  
Jay Stockley ◽  
Janelle Shane ◽  
Kelly Kluttz ◽  
Douglas McKnight ◽  
...  
Keyword(s):  
Optical Communications ◽  
Beam Steering ◽  
Active Sensing ◽  
Polarization Gratings

Polarization gratings (PGs) enable a novel architecture for dynamic non-mechanical steering of light over large angles and with large clear apertures. This beam steering approach has many applications in active sensing and optical communications. In this review, we describe some of the defining characteristics of this beam steering architecture and highlight several applications of the technology.

Polarized beam steering using multiply-cascaded rotating polarization gratings

2021 ◽  
Author(s):  
Moritsugu Sakamoto ◽  
Huynh Thanh Nhan ◽  
Kohei Noda ◽  
Tomoyuki Sasaki ◽  
Tadayoshi Kamei ◽  
...  
Keyword(s):  
Beam Steering ◽  
Polarization Gratings ◽  
Polarized Beam

Numerical Simulation of High Accuracy and High Efficiency Beam Steering Based on Liquid Crystal Optical Phase Array

2014 ◽  
Vol 41 (2) ◽  
pp. 0202002
Author(s):  
师宇斌 Shi Yubin ◽  
马浩统 Ma Haotong ◽  
马阎星 Ma Yanxing ◽  
吕洋 Lü Yang ◽  
司磊 Si Lei
Keyword(s):  
Numerical Simulation ◽  
Liquid Crystal ◽  
High Efficiency ◽  
Beam Steering ◽  
High Accuracy ◽  
Phase Array ◽  
Optical Phase

Large-aperture, wide-angle nonmechanical beam steering using polarization gratings

2016 ◽  
Vol 56 (3) ◽  
pp. 031211 ◽  
Author(s):  
Steven Serati ◽  
Christopher L. Hoy ◽  
Lance Hosting ◽  
Kelly Kluttz ◽  
Jay Stockley ◽  
...  
Keyword(s):  
Beam Steering ◽  
Wide Angle ◽  
Large Aperture ◽  
Polarization Gratings

Optical Analyses of Microfluidic Tunable Liquid Prisms for Enhanced Solar Energy Collection

2014 ◽  
Author(s):  
Abhishek Wadhwa ◽  
Sung-Yong Park
Keyword(s):  
Refractive Index ◽  
Solar Energy ◽  
Reflection Loss ◽  
High Efficiency ◽  
Material Selection ◽  
Incident Angle ◽  
Tracking System ◽  
Low Cost ◽  
Beam Steering ◽  
Index Ratio

We present optical analyses of a microfluidic tunable liquid prism to find its optimized configuration that can achieve wider beam steering as well as less reflection loss and eventually maximize solar energy capture without mechanical tracking. For this study, four different prism configurations are compared from single to quad-stacked ones with various refractive indices of the liquids filled in the prism. Its beam steering capability can be improved by increasing the refractive index ratio between the liquids used and by using higher number of the stacked prisms. The quad-stacked prism is able to steer incoming sunlight with an incident angle of a α ≤ ± 75° at an apex angle of φ ≤ ± 30°, which represents more than 5 times improvement, when it is compared to the single prism using the same liquids. For appropriate liquid material selection, the effect of refractive index ratio, r = n2/n1, on beam steering was additionally studied. However, one considerable issue is the fact that the better beam steering, the more reflection loss. This is because both higher number of interfaces and larger refractive index ratio make more reflection at each of the interfaces. Our reflectance analysis showed that the quad prism performs inferior to the double prism until α = ± 32°, while being of superior beam steering performance. To further reduce the solar energy loss through the quad prism, a modified configuration is proposed with a thin film added to the interfaces. 50 % of the total reflection was reduced. Our technology promises an alternative to a low-cost and high-efficiency solar tracking system capable of beam steering as wide as ± 75° and reflection loss as low as 4.5%, during all daily tracking of the sun.

scholarly journals Freeform Metagratings Based on Complex Light Scattering Dynamics for Extreme, High Efficiency Beam Steering

2017 ◽  
Vol 530 (1) ◽  
pp. 1700302 ◽  
Author(s):  
Jianji Yang ◽  
David Sell ◽  
Jonathan A. Fan
Keyword(s):  
Light Scattering ◽  
High Efficiency ◽  
Beam Steering

High-Throughput Continuous Beam Steering Using Rotating Polarization Gratings

2010 ◽  
Vol 22 (4) ◽  
pp. 200-202 ◽  
Author(s):  
Chulwoo Oh ◽  
Jihwan Kim ◽  
John Muth ◽  
Steve Serati ◽  
Michael J. Escuti
Keyword(s):  
High Throughput ◽  
Beam Steering ◽  
Continuous Beam ◽  
Polarization Gratings

scholarly journals Mid-wave infrared beam steering based on high-efficiency liquid crystal diffractive waveplates

2017 ◽  
Vol 25 (19) ◽  
pp. 22404 ◽  
Author(s):  
Fangwang Gou ◽  
Fenglin Peng ◽  
Qitian Ru ◽  
Yun-Han Lee ◽  
Haiwei Chen ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
High Efficiency ◽  
Beam Steering

scholarly journals High-efficiency, tunable, fringe-field switching-mode beam steering based on a liquid crystal Pancharatnam phase

2020 ◽  
Vol 59 (34) ◽  
pp. 10706
Author(s):  
Comrun Yousefzadeh ◽  
Andre Van Rynbach ◽  
Doug Bryant ◽  
Philip Bos
Keyword(s):  
Liquid Crystal ◽  
High Efficiency ◽  
Beam Steering ◽  
Fringe Field ◽  
Pancharatnam Phase ◽  
Mode Beam ◽  
Switching Mode
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