scholarly journals Thin-film perfect infrared absorbers over single- and dual-band atmospheric windows

2020 ◽  
Vol 45 (10) ◽  
pp. 2800 ◽  
Author(s):  
Jihua Zhang ◽  
Ran Wei ◽  
Mohamed ElKabbash ◽  
E. Michael Campbell ◽  
Chunlei Guo
Keyword(s):  
Thin Film ◽  
Dual Band ◽  
Atmospheric Windows

Novel Infrared Stealth Properties of Cotton Fabric with ZnO: (Al, In) Coating

2014 ◽  
Vol 936 ◽  
pp. 1031-1034 ◽  
Author(s):  
Xi Li Yu ◽  
Lin Ping Zhang ◽  
Yi Zhong ◽  
Hong Xu ◽  
Zhi Ping Mao
Keyword(s):  
Thin Film ◽  
Crystalline Phase ◽  
Sol Gel ◽  
Infrared Emission ◽  
Cotton Fabrics ◽  
Dual Band ◽  
Infrared Emissivity ◽  
Measuring Instrument ◽  
Coated Fabric ◽  
Doped Zno

In this paper, we report a study on the infrared stealth properties of cotton fabrics with ZnO: (Al,In) coating. Al, In doped ZnO samples were prepared through sol-gel method. The crystalline phase of the ZnO: (Al, In) solids were determined by XRD. IR-2 Dual-Band Infrared Emissivity Measuring Instrument was used to test the infrared emissivity of the coated fabric. Infrared stealth effect of ZnO: (Al, In) coated fabric was measured using thermal infrared photospectrometry instrument. It was found that the ZnO: (Al, In) thin film has a low infrared emission in the range of 8 ~ 14μm wavelengths, and the addition of Al and In leaded to a better infrared stealth effect.

Dual-band QWIP focal plane array for the second and third atmospheric windows

2005 ◽  
Vol 47 (1-2) ◽  
pp. 53-58 ◽  
Author(s):  
H. Schneider ◽  
T. Maier ◽  
J. Fleissner ◽  
M. Walther ◽  
P. Koidl ◽  
...  
Keyword(s):  
Focal Plane ◽  
Focal Plane Array ◽  
Dual Band ◽  
Atmospheric Windows

Smart Windows with a VO2 Thin Film as a Conductive Layer for Efficient and Independent Dual-Band Modulation

2021 ◽  
Author(s):  
Jingxin Sang ◽  
Wenbing Zhu ◽  
Yunfei Feng ◽  
Yang Liu ◽  
Jianhua Shang ◽  
...  
Keyword(s):  
Thin Film ◽  
Dual Band ◽  
Conductive Layer ◽  
Smart Windows

Design of RF Rectenna on Thin Film to Power Wearable Electronics

2020 ◽  
pp. 25-39
Author(s):  
Naresh B. ◽  
Vinod Kumar Singh ◽  
Virendra Kumar Sharma
Keyword(s):  
Thin Film ◽  
Solar Cell ◽  
System Integration ◽  
Impedance Matching ◽  
Dual Band ◽  
Microwave Antenna ◽  
Wearable Electronics ◽  
Amorphous Silicon Solar Cell ◽  
Voltage Doubler ◽  
Flexible Solar Cell

This chapter reports a hybrid wearable energy harvesting system. Integration of microwave antenna on thin film amorphous silicon solar cell creates a hybrid system that can harvest both the solar and microwave energies. The antenna designed on solar cell will harvest the microwave energy at dual frequencies 1.85 GHz and 2.45 GHz with an effective return loss of 28dB and 27dB respectively. A complete hybrid harvesting system consist of a flexible solar cell, antenna, voltage doubler, and impedance matching dual band filter. The rectifier, designed on a rigid glass-reinforced epoxy substrate, is a voltage doubler and a matching circuit is designed by microstrip lines is used.

Thin Film Dual Band Metamaterial Absorber Based on Gold Triangular Patches

2013 ◽  
Author(s):  
Peiqian Tong ◽  
Shou Zhang ◽  
Yanxia Cui ◽  
Yinyue Lin ◽  
Ting Ji ◽  
...  
Keyword(s):  
Thin Film ◽  
Metamaterial Absorber ◽  
Dual Band

Thin Film Dual Band Metamaterial Absorber Based on Gold Triangular Patches

2013 ◽  
Author(s):  
Peiqian Tong ◽  
Shou Zhang ◽  
Yanxia Cui ◽  
Yinyue Lin ◽  
Ting Ji ◽  
...  
Keyword(s):  
Thin Film ◽  
Metamaterial Absorber ◽  
Dual Band

scholarly journals Dual Band Thin Film Infrared Detector Design and Performance Improvement using Plasmonic Nanostructure

2021 ◽  
Author(s):  
Mohammad Bashirpour ◽  
Saeed Khankalantary ◽  
Mohammadreza Kolahdouz
Keyword(s):  
Thin Film ◽  
Quantum Efficiency ◽  
Incident Light ◽  
Infrared Detector ◽  
Antireflection Coating ◽  
Dual Band ◽  
Absorption Enhancement ◽  
Metal Semiconductor Metal ◽  
Conventional Structure ◽  
And Performance

Abstract A new dual band thin film metal-semiconductor-metal infrared photodetector base on InGaAs for wavelength of 1.1–1.7 µm and InSb for wavelength of 3–5 µm is proposed and investigated numerically. One major problem of thin film photodetectors is low quantum efficiency that originates from low optical absorption. The quantum efficiency of proposed structure is improved by locating the array of optimized aluminum nanostructure (Al-NS) between the InGaAs and InSb layers. Using optimized Al-NS between the stack of InGaAs and InSb (InSb/Al-NS/InGaAs) results in plasmon excitation inside the photosensitive layers and so, higher photocarrier generation. Moreover, locating zinc oxide nanorode as an antireflection coating on top of detector reduces the incident light reflection in both spectrum of 1.1–1.7 µm and 3–5 µm. The finite different time domain method is used to investigated the optical properties of proposed structure and optimize the structure. According to the simulation results, designed structure gives rise to 108.1%, 110% and 320% light absorption enhancement at wavelength of 1.33 µm, 1.55 µm and 4 µm, respectively compared to reference conventional structure.

scholarly journals Reconfigurable Three Functional Dimension Single and Dual-band SDR Front-ends using Thin Film BST-based Varactors

IEEE Access ◽  
2022 ◽  
pp. 1-1
Author(s):  
Patricia Bouca ◽  
Ricardo Figueiredo ◽  
Joao Nuno Matos ◽  
Paula M. Vilarinho ◽  
Nuno Borges Carvalho
Keyword(s):  
Thin Film ◽  
Dual Band ◽  
Functional Dimension

Integration of RF rectenna with thin film solar cell to power wearable electronics

2020 ◽  
pp. 1-12
Author(s):  
B. Naresh ◽  
Vinod Kumar Singh ◽  
V. K. Sharma
Keyword(s):  
Thin Film ◽  
Solar Cell ◽  
Conversion Efficiency ◽  
Thin Film Solar Cell ◽  
Microstrip Antenna ◽  
Power Level ◽  
Input Power ◽  
Dual Band ◽  
Wearable Electronics ◽  
Voltage Doubler

Abstract This paper reports an integration of dual band microstrip antenna with thin film amorphous silicon solar cell which creates a wearable system to harvest microwave energy. The multiple layers in the encapsulation of the thin film solar cell are used as a substrate for microstrip antenna. The rectifier and matching circuit are designed on cotton jeans material and the whole system is mechanically supported by the foam of 5 mm thick. The performance of the antenna is studied for the mechanical bending condition. The device has maintained good power conversion efficiency. The efficiency of the voltage doubler is tested by varying radio frequency power levels from −30 to10 dBm. The voltage doubler conversion efficiency at 1.85 and 2.45 GHz are 58 and 43%, respectively, for a load of 7.5 kΩ for an input power level of −5 dBm.

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