scholarly journals Simple technique for determining the refractive index of phase-change materials using near-infrared reflectometry: publisher’s note

2020 ◽  
Vol 10 (8) ◽  
pp. 1826
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

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

scholarly journals Simple technique for determining the refractive index of phase-change materials using near-infrared reflectometry: publisher’s note

2020 ◽  
Vol 10 (8) ◽  
pp. 1826
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

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

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 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

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

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

scholarly journals Near-Infrared Rewritable, Non-Volatile Subwavelength Absorber Based on Chalcogenide Phase Change Materials

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1222 ◽  
Author(s):  
Jianfa Zhang ◽  
Yiqiong Zhang ◽  
Qilin Hong ◽  
Wei Xu ◽  
Zhihong Zhu ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Near Infrared ◽  
Beam Steering ◽  
Contrast Ratio ◽  
Photonic Devices ◽  
Optical Modulation ◽  
High Contrast ◽  
Perfect Absorption ◽  
Continuous Tuning

Chalcogenide phase change materials enable the realization of novel, non-volatile, switchable electronic and photonic devices. In this paper, we propose a type of rewritable, non-volatile near infrared subwavelength absorber based on chalcogenide phase change materials. Our numerical simulations show that nearly perfect absorption more than 0.99 can be realized in the written state while the absorption of as-deposited or erased state is lower than 0.15 in the studied spectral range, leading to high contrast ratio of reflection more than 20 dB. Continuous tuning of the absorption spectra can be realized not only by varying the geometric parameters of the absorber but also by changing the crystallization ratio of the switched Ge 2 Sb 2 Te 5 (GST). The proposed device may find widespread applications in optical modulation, beam steering and so on.

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