Bidirectional mid-infrared communications between two identical macroscopic graphene fibres

AbstractAmong light-based free-space communication platforms, mid-infrared (MIR) light pertains to important applications in biomedical engineering, environmental monitoring, and remote sensing systems. Integrating MIR generation and reception in a network using two identical devices is vital for the miniaturization and simplification of MIR communications. However, conventional MIR emitters and receivers are not bidirectional due to intrinsic limitations of low performance and often require cryogenic cooling. Here, we demonstrate that macroscopic graphene fibres (GFs) assembled from weakly-coupled graphene layers allow room-temperature MIR detection and emission with megahertz modulation frequencies due to the persistence of photo-thermoelectric effect in millimeter-length and the ability to rapidly modulate gray-body radiation. Based on the dual-functionality of GFs, we set up a system that conducts bidirectional data transmission by switching modes between two identical GFs. The room-temperature operation of our systems and the potential to produce GFs on industrial textile-scale offer opportunities for simplified and wearable optical communications.

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The Use of Unmanned Aerial Vehicles in Remote Sensing Systems

Sensors ◽

10.3390/s20072003 ◽

2020 ◽

Vol 20 (7) ◽

pp. 2003 ◽

Cited By ~ 1

Author(s):

Aleksander Olejnik ◽

Łukasz Kiszkowiak ◽

Robert Rogólski ◽

Grzegorz Chmaj ◽

Michał Radomski ◽

...

Keyword(s):

Remote Sensing ◽

Unmanned Aerial Vehicles ◽

Distribution Networks ◽

Flight Tests ◽

Sensing System ◽

Sensing Systems ◽

Remote Sensing Systems ◽

Set Up ◽

Autonomous Helicopter ◽

Transmission And Distribution

This paper describes the possibility of using a small autonomous helicopter to perform tasks using a remote sensing system. This article further shows the most effective way to properly set up autopilot and to process its validation during flight tests. The most important components of the remote sensing system are described and the possibilities of using this system to monitor gas transmission and distribution networks are presented.

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Mid-Infrared Remote Sensing Systems and Their Application to Lithologic Mapping

IEEE Transactions on Geoscience and Remote Sensing ◽

10.1109/tgrs.1987.289822 ◽

1987 ◽

Vol GE-25 (2) ◽

pp. 230-237 ◽

Cited By ~ 5

Author(s):

John E. Eberhardt ◽

Andrew A. Green ◽

John G. Haub ◽

Ronald J. P. Lyon ◽

Arthur W. Pryor

Keyword(s):

Remote Sensing ◽

Mid Infrared ◽

Sensing Systems ◽

Infrared Remote Sensing ◽

Remote Sensing Systems ◽

Lithologic Mapping

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Definitions of Attributes for Limb-Scanning or Limb-Imaging Remote Sensing Systems.

10.21236/ada294616 ◽

1995 ◽

Author(s):

S. D. Lockwood ◽

D. Hardin ◽

G. J. Miller ◽

C. Meesuk ◽

P. R. Straus

Keyword(s):

Remote Sensing ◽

Sensing Systems ◽

Remote Sensing Systems

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High Efficiency, Room Temperature Mid-Infrared Semiconductor Laser Development for IR Countermeasures

10.21236/ada501427 ◽

2009 ◽

Author(s):

Karen J. Nordheden ◽

Linda J. Olafsen

Keyword(s):

Semiconductor Laser ◽

Room Temperature ◽

High Efficiency ◽

Mid Infrared ◽

Laser Development

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Mid infrared polarization engineering via sub-wavelength biaxial hyperbolic van der Waals crystals

Scientific Reports ◽

10.1038/s41598-021-86056-x ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Saurabh Dixit ◽

Nihar Ranjan Sahoo ◽

Abhishek Mall ◽

Anshuman Kumar

Keyword(s):

Room Temperature ◽

Extinction Ratio ◽

Polarization State ◽

Van Der Waals ◽

Photonic Devices ◽

Mid Infrared ◽

Precise Control ◽

Electromagnetic Simulations ◽

Frequency Regime ◽

Sub Wavelength

AbstractMid-infrared (IR) spectral region is of immense importance for astronomy, medical diagnosis, security and imaging due to the existence of the vibrational modes of many important molecules in this spectral range. Therefore, there is a particular interest in miniaturization and integration of IR optical components. To this end, 2D van der Waals (vdW) crystals have shown great potential owing to their ease of integration with other optoelectronic platforms and room temperature operation. Recently, 2D vdW crystals of $$\alpha$$ α -$$\hbox {MoO}_{3}$$ MoO 3 and $$\alpha$$ α -$$\hbox {V}_2 \hbox {O}_5$$ V 2 O 5 have been shown to possess the unique phenomenon of natural in-plane biaxial hyperbolicity in the mid-infrared frequency regime at room temperature. Here, we report a unique application of this in-plane hyperbolicity for designing highly efficient, lithography free and extremely subwavelength mid-IR photonic devices for polarization engineering. In particular, we show the possibility of a significant reduction in the device footprint while maintaining an enormous extinction ratio from $$\alpha$$ α -$$\hbox {MoO}_{3}$$ MoO 3 and $$\alpha$$ α -$$\hbox {V}_2$$ V 2 $$\hbox {O}_5$$ O 5 based mid-IR polarizers. Furthermore, we investigate the application of sub-wavelength thin films of these vdW crystals towards engineering the polarization state of incident mid-IR light via precise control of polarization rotation, ellipticity and relative phase. We explain our results using natural in-plane hyperbolic anisotropy of $$\alpha$$ α -$$\hbox {MoO}_{3}$$ MoO 3 and $$\alpha$$ α -$$\hbox {V}_2$$ V 2 $$\hbox {O}_5$$ O 5 via both analytical and full-wave electromagnetic simulations. This work provides a lithography free alternative for miniaturized mid-infrared photonic devices using the hyperbolic anisotropy of $$\alpha$$ α -$$\hbox {MoO}_{3}$$ MoO 3 and $$\alpha$$ α -$$\hbox {V}_2$$ V 2 $$\hbox {O}_5$$ O 5 .

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Hydrogen Transport in 34CrMo4 Martensitic Steel: Influence of Microstructural Defects on H Diffusion

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.323-325.485 ◽

2012 ◽

Vol 323-325 ◽

pp. 485-490 ◽

Cited By ~ 4

Author(s):

L. Moli-Sanchez ◽

F. Martin ◽

E. Leunis ◽

J. Chêne ◽

M. Wery

Keyword(s):

Diffusion Coefficient ◽

Room Temperature ◽

Martensitic Steel ◽

Hydrogen Trapping ◽

Martensitic Steels ◽

Hydrogen Diffusivity ◽

Apparent Diffusion ◽

Quenched Steel ◽

Set Up ◽

Permeation Test

The electrochemical permeation technique was used to evaluate the effect of the microstructure on hydrogen diffusivity and hydrogen trapping at room temperature in martensitic steels. A detailed study of the electrochemical permeation technique was first performed in order to identify the boundary conditions of a permeation test in the selected experimental set-up. The validity of the apparent diffusion coefficient derived from this test is also discussed. A 34CrMo4 quenched steel has been selected and designed at three tempering temperatures (200°C, 540°C and 680°C) in order to obtain three different microstructures. According to permeation measurements, H diffusion strongly depends on the microstructure. The material tempered at 540°C exhibits the smallest diffusion coefficient and the largest fraction of reversible traps at room temperature.

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