scholarly journals Tunable optical switching in the near-infrared spectral regime by employing plasmonic nanoantennas containing phase change materials

2017 ◽  
Vol 25 (20) ◽  
pp. 23755 ◽  
Author(s):  
Priten B. Savaliya ◽  
Arun Thomas ◽  
Rishi Dua ◽  
Anuj Dhawan
Keyword(s):  
Phase Change ◽  
Optical Switching ◽  
Phase Change Materials ◽  
Near Infrared ◽  
Infrared Spectral ◽  
Plasmonic Nanoantennas

Reconfigurable infrared spectral imaging with phase change materials

2019 ◽  
Author(s):  
Jeong-Sun Moon ◽  
Hwa-Chang Seo ◽  
K. Kay Son ◽  
Eilam Yalon ◽  
Kang-mu Lee ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Spectral Imaging ◽  
Infrared Spectral

scholarly journals Thermal Properties of PEG/Graphene Nanoplatelets (GNPs) Composite Phase Change Materials with Enhanced Thermal Conductivity and Photo-Thermal Performance

2018 ◽  
Vol 8 (12) ◽  
pp. 2613 ◽  
Author(s):  
Lihong He ◽  
Hao Wang ◽  
Hongzhou Zhu ◽  
Yu Gu ◽  
Xiaoyan Li ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Phase Change ◽  
Energy Conversion ◽  
Phase Change Materials ◽  
Near Infrared ◽  
Graphene Nanoplatelets ◽  
Solar Irradiation ◽  
Blending Method ◽  
Conduction Pathway ◽  
Composite Phase Change Materials

This paper mainly concentrates on the thermal conductivity and photo-thermal conversion performance of polyethylene glycol (PEG)/graphene nanoplatelets (GNPs) composite phase change materials (PCMs). The temperature-assisted solution blending method is used to prepare PCM with different mass fraction of GNPs. According to the scanning electron microscope (SEM), GNPs are evenly distributed in the PEG matrix, forming a thermal conduction pathway. The Fourier transform infrared spectra (FT-IR) and X-ray diffraction (XRD) results show that the composites can still inherit the crystallization structure of PEG, moreover, there are only physical reactions between PEG and GNPs rather than chemical reactions. Differential scanning calorimeter (DSC) and thermal conductivity analysis results indicate that it may be beneficial to add a low loading ration of GNPs to obtain the suitable latent heat as well as enhance the thermal conductivity of composites. To investigate the change in the rheological behavior due to the effect of GNPs, the viscosity of the composites was measured as well. The photo-thermal energy conversion experiment indicates that the PEG/GNPs composites show better performance in photothermal energy conversion, moreover, the Ultraviolet-visible-Near Infrared spectroscopy is applied to illustrate the reasons for the higher absorption efficiency of PEG/GNPs for solar irradiation.

scholarly journals Design of hybrid narrow-band plasmonic absorber based on chalcogenide phase change material in the infrared spectrum

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Israel Alves Oliveira ◽  
Igor Leonardo Gomes de Souza ◽  
Vitaly Felix Rodriguez-Esquerre
Keyword(s):  
Phase Change ◽  
Electromagnetic Waves ◽  
Phase Change Materials ◽  
Empirical Relation ◽  
Three Dimensional ◽  
Normal Incidence ◽  
Resonant Absorption ◽  
Nanophotonic Devices ◽  
Intermediate Phases ◽  
Infrared Spectral

AbstractStructures absorbing electromagnetic waves in the infrared spectral region are important optical components in key areas such as biosensors, infrared images, thermal emitters, and special attention is required for reconfigurable devices. We propose a three-dimensional metal-dielectric plasmonic absorber with a layer of PCM’s (Phase Change Materials). The phase shift effects of PCMs are numerically analyzed, and it is possible to obtain a shifting control of the resonant absorption peaks between the amorphous and crystalline states using the Lorentz–Lorenz relation. By using this empirical relation, we analyzed the peak absorption shift at intermediate phases between the amorphous and the crystalline. The geometric parameters of the structure with the PCM layer in the semi-crystalline state were adjusted to exhibit strong absorption for normal incidence. The effects of the oblique incidence on the absorption for the TM and TE polarization modes were also analyzed. Our results demonstrate that PCMs have great potential for reconfigurable nanophotonic devices.

scholarly journals Enhancement of coherent phonon amplitude in phase-change materials by near-infrared laser irradiation

2017 ◽  
Vol 111 (11) ◽  
pp. 112101 ◽  
Author(s):  
Takara Suzuki ◽  
Yuta Saito ◽  
Paul Fons ◽  
Alexander V. Kolobov ◽  
Junji Tominaga ◽  
...  
Keyword(s):  
Phase Change ◽  
Laser Irradiation ◽  
Phase Change Materials ◽  
Near Infrared ◽  
Infrared Laser ◽  
Coherent Phonon ◽  
Infrared Laser Irradiation

Optical switching of GeTe phase change materials for high-frequency applications

2017 ◽  
Author(s):  
Aurelian Crunteanu ◽  
Laure Huitema ◽  
Jean-Christophe Orlianges ◽  
Cyril Guines ◽  
Damien Passerieux
Keyword(s):  
Phase Change ◽  
High Frequency ◽  
Optical Switching ◽  
Phase Change Materials

Three distinct optical-switching states in phase-change materials containing impurities: From physical origin to material design

2021 ◽  
Vol 75 ◽  
pp. 118-125
Author(s):  
Chaobin Bi ◽  
Kaicheng Xu ◽  
Chaoquan Hu ◽  
Ling Zhang ◽  
Zhongbo Yang ◽  
...  
Keyword(s):  
Phase Change ◽  
Optical Switching ◽  
Phase Change Materials ◽  
Material Design ◽  
Physical Origin

scholarly journals Near Infrared Spectrum Analysis of Organic/Inorganic Composite Microcapsule Phase Change Materials

2011 ◽  
Vol 27 (05) ◽  
pp. 1039-1044 ◽  
Author(s):  
WU Xiao-Lin ◽  
◽  
SUN Rong ◽  
ZHU Peng-Li ◽  
DU Ru-Xu ◽  
...  
Keyword(s):  
Infrared Spectrum ◽  
Phase Change ◽  
Spectrum Analysis ◽  
Phase Change Materials ◽  
Near Infrared ◽  
Inorganic Composite ◽  
Near Infrared Spectrum

scholarly journals Steerable plasmonic nanoantennas: active steering of radiation patterns using phase change materials

2019 ◽  
Vol 27 (22) ◽  
pp. 31567 ◽  
Author(s):  
Priten B. Savaliya ◽  
Nitin Gupta ◽  
Anuj Dhawan
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Radiation Patterns ◽  
Active Steering ◽  
Plasmonic Nanoantennas

scholarly journals Simple technique for determining the refractive index of phase-change materials using near-infrared reflectometry

2020 ◽  
Vol 10 (7) ◽  
pp. 1675
Author(s):  
E. Gemo ◽  
S. V. Kesava ◽  
C. Ruiz De Galarreta ◽  
L. Trimby ◽  
S. García-Cuevas Carrillo ◽  
...  
Keyword(s):  
Refractive Index ◽  
Phase Change ◽  
Phase Change Materials ◽  
Near Infrared ◽  
Simple Technique

Reconfigurable near-infrared metasurfaces using phase-change materials

2021 ◽  
Author(s):  
Sajjad Abdollahramezani ◽  
Omid Hemmatyar ◽  
Hossein Taghinejad ◽  
Muliang Zhu ◽  
Alexander Gallmon ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Near Infrared
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