Bandwidth-unlimited polarization-maintaining metasurfaces

Any arbitrary state of polarization of light beam can be decomposed into a linear superposition of two orthogonal oscillations, each of which has a specific amplitude of the electric field. The dispersive nature of diffractive and refractive optical components generally affects these amplitude responses over a small wavelength range, tumbling the light polarization properties. Although recent works suggest the realization of broadband nanophotonic interfaces that can mitigate frequency dispersion, their usage for arbitrary polarization control remains elusively chromatic. Here, we present a general method to address broadband full-polarization properties of diffracted fields using an original superposition of circular polarization beams transmitted through metasurfaces. The polarization-maintaining metasurfaces are applied for complex broadband wavefront shaping, including beam deflectors and white-light holograms. Eliminating chromatic dispersion and dispersive polarization response of conventional diffractive elements lead to broadband polarization-maintaining devices of interest for applications in polarization imaging, broadband-polarimetry, augmented/virtual reality imaging, full color display, etc.

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Enhanced Tire Mark Visualization Using Polarization Imaging

Volume 15: Safety, Reliability and Risk; Virtual Podium (Posters) ◽

10.1115/imece2013-63953 ◽

2013 ◽

Author(s):

Matthew L. Schwall ◽

Daniel E. Rosenfeld ◽

Joel C. Wilson

Keyword(s):

Processing Technique ◽

Light Polarization ◽

The State ◽

Image Processing Technique ◽

Accurate Identification ◽

Polarization Imaging ◽

Reflected Light ◽

Contrast Enhanced ◽

State Of Polarization ◽

Polarization Of Light

Accident reconstructions often rely on measurements of tire marks left on the roadway surface. However, accurate identification and measurement of these marks can be challenging when the marks are faint, as is often the case with braking marks left by vehicles equipped with anti-lock (ABS) brakes. This paper describes an image processing technique that exploits differences in the polarization of reflected light to create images that significantly enhance tire mark visualization. The technique requires multiple photographs taken from the same perspective, but with a polarizing filter oriented at different angles. Based on these digital images, the state of polarization of light can be determined for each pixel. A new image can then be created in which the intensity of the image is proportional to the state of light polarization. Results are presented using ABS tire marks, and demonstrate that under certain conditions the resulting image more clearly differentiates tire marks than conventional photographs or even contrast enhanced conventional photographs.

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Meta-Deflectors Made of Dielectric Nanohole Arrays with Anti-Damage Potential

Photonics ◽

10.3390/photonics8040107 ◽

2021 ◽

Vol 8 (4) ◽

pp. 107

Author(s):

Haichao Yu ◽

Feng Tang ◽

Jingjun Wu ◽

Zao Yi ◽

Xin Ye ◽

...

Keyword(s):

Electric Field ◽

Electric Fields ◽

Laser Cutting ◽

High Complexity ◽

Damage Potential ◽

Optical Components ◽

Nanohole Arrays ◽

Intense Light ◽

Polarization Of Light ◽

Air Hole

In intense-light systems, the traditional discrete optical components lead to high complexity and high cost. Metasurfaces, which have received increasing attention due to the ability to locally manipulate the amplitude, phase, and polarization of light, are promising for addressing this issue. In the study, a metasurface-based reflective deflector is investigated which is composed of silicon nanohole arrays that confine the strongest electric field in the air zone. Subsequently, the in-air electric field does not interact with the silicon material directly, attenuating the optothermal effect that causes laser damage. The highest reflectance of nanoholes can be above 99% while the strongest electric fields are tuned into the air zone. One presentative deflector is designed based on these nanoholes with in-air-hole field confinement and anti-damage potential. The 1st order of the meta-deflector has the highest reflectance of 55.74%, and the reflectance sum of all the orders of the meta-deflector is 92.38%. The optothermal simulations show that the meta-deflector can theoretically handle a maximum laser density of 0.24 W/µm2. The study provides an approach to improving the anti-damage property of the reflective phase-control metasurfaces for intense-light systems, which can be exploited in many applications, such as laser scalpels, laser cutting devices, etc.

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Study of the Correction of Effects Chromatic Dispersion and Attenuation to Evaluate the Optical Transmission

Journal of Optical Communications ◽

10.1515/joc-2019-0010 ◽

2020 ◽

Vol 41 (2) ◽

pp. 209-214

Author(s):

Saliha Kheris ◽

Badra Bouabdallah

Keyword(s):

Optical Transmission ◽

Signal To Noise Ratio ◽

Chromatic Dispersion ◽

Optical Amplifier ◽

Laser Source ◽

Long Distance ◽

Optical Components ◽

Optical Detector ◽

Fiber Optical ◽

Dispersion And Attenuation

AbstractIn this paper, we have presented a global study of simple bonds, focusing on the main limitations introduced by different optical components as laser source, fiber, optical amplifier, and optical detector. The construction of a long-distance link requires the compensation of attenuation and chromatic dispersion phenomena. Thus, it is well known that the attenuations cause the drop of the signal intensity, whereas the pulse spreading, due to the dispersion, causes the increase of the Bit Error Rate (BER) and consequently the reduction of the signal to noise ratio (SNR). In this purpose, we have calculated the quality factor (Q) issues from the noisy signal’s simulations. We have found a Q of 7.02 to a BER of 0.8 e−12. The founding results match well with fixes norms in telecommunication field.

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Light Polarization Control using Liquid Crystal Devices

IEEJ Transactions on Electronics Information and Systems ◽

10.1541/ieejeiss1987.112.10_597 ◽

1992 ◽

Vol 112 (10) ◽

pp. 597-605

Author(s):

Yasuaki Kidoh ◽

Hiroyoshi Onnagawa ◽

Hiroyuki Okada ◽

Kazuo Miyashita

Keyword(s):

Liquid Crystal ◽

Light Polarization ◽

Liquid Crystal Devices ◽

Polarization Control

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Light polarization control due to electrooptic effect

Electronics and Communications in Japan (Part II Electronics) ◽

10.1002/ecjb.4420680605 ◽

1985 ◽

Vol 68 (6) ◽

pp. 38-47

Author(s):

Yasuaki Kido ◽

Kazuhito Furuya ◽

Yasuharu Suematsu

Keyword(s):

Light Polarization ◽

Electrooptic Effect ◽

Polarization Control

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Polarization-Maintaining Optical Components

Optik & Photonik ◽

10.1002/opph.201700012 ◽

2017 ◽

Vol 12 (3) ◽

pp. 38-41

Author(s):

Pietro Bernasconi

Keyword(s):

Optical Components ◽

Polarization Maintaining

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Photoinduced superstructural chirality in photochromic polymer: A viable route to light polarization control

CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference ◽

10.1109/cleoe-eqec.2009.5196327 ◽

2009 ◽

Author(s):

P. Pagliusi ◽

C. Provenzano ◽

V. P. Shibaev ◽

G. Cipparrone

Keyword(s):

Light Polarization ◽

Polarization Control ◽

Photochromic Polymer

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MANIPULATING THE POLARIZATION OF TERAHERTZ WAVES WITH METAMATERIAL DEVICES

Journal of Molecular and Engineering Materials ◽

10.1142/s2251237314400085 ◽

2014 ◽

Vol 02 (02) ◽

pp. 1440008 ◽

Cited By ~ 1

Author(s):

LONGQING CONG ◽

JIANQIANG GU ◽

ZHEN TIAN ◽

RANJAN SINGH ◽

JIAGUANG HAN ◽

...

Keyword(s):

Polarization State ◽

Terahertz Waves ◽

Optical Components ◽

Polarization Control ◽

Design Flexibility ◽

Potential Applications ◽

Excellent Control ◽

Terahertz Frequencies ◽

Control Devices ◽

Increasing Demand

As the potential applications of terahertz science and technology become extremely important, there is an increasing demand for improved terahertz optical components. One of such devices on demand is the class of polarization control devices. Recently, metasurfaces have emerged as designer structures with excellent control, design flexibility, and multifaceted functionalities. Metamaterials offer fascinating prospects for manipulating the polarization state of terahertz waves. Here, we discuss different metamaterial device designs that exhibit properties of perfect linear polarization rotation and linear to either linear or circular polarization conversion at narrowband as well as broadband terahertz frequencies.

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Generation of Switchable Chirp Waveforms in the Photonic Domain with Immunity to Dispersion-Induced Power Fading

Photonics ◽

10.3390/photonics8110501 ◽

2021 ◽

Vol 8 (11) ◽

pp. 501

Author(s):

Chaoqun Huang ◽

Jun Ou ◽

Hao Chi

Keyword(s):

Bias Voltage ◽

Chromatic Dispersion ◽

Radio Over Fiber ◽

Rf Power ◽

Optical Filtering ◽

Polarization Control ◽

Mach Zehnder Modulator ◽

The Stability ◽

Rf Signal ◽

The Given

A novel photonic approach to generating switchable multi-format chirp waveforms using a dual-drive dual-parallel Mach–Zehnder modulator (DD-DPMZM) is proposed and experimentally demonstrated. By properly controlling the bias voltage on the DD-DPMZM, different chirp RF waveforms, including the dual-, down-, and up-chirp waveforms, can be obtained when an RF signal and a chirp RF signal are injected into the modulator. A main feature of this approach is that it can eliminate chromatic dispersion-induced RF power fading, which is highly desired in distributed multi-functional radars based on radio over fiber. There is no polarization control and optical filtering in the given scheme, which also improves the stability and feasibility of the approach. An experiment successfully demonstrated the generation and switching of the multi-format chirp waveforms and the capability of immunity to dispersion-induced power fading.

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