Optical and Electrical Characterization of Pure PMMA for Terahertz Wide-band Metamaterial Absorbers

Shi, Zaiying; Song, Lixin; Zhang, Tao

doi:10.1007/s10762-018-0553-8

Cited by 23 publications

(10 citation statements)

References 36 publications

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“…34,35 The unstrained and 1.3% tensile biaxial strain situations are shown. We considered ε t = 3 36,37 for the top dielectric region composed of PMMA. The experimental data for the different regions (on hBN, on SiO 2 and the bubble) is shown in rectangles.…”

Section: Shg Pl and Raman Characterizationmentioning

confidence: 99%

Revealing the impact of strain in the optical properties of bubbles in monolayer MoSe₂

et al. 2022

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Section: Shg Pl and Raman Characterizationmentioning

confidence: 99%

Revealing the impact of strain in the optical properties of bubbles in monolayer MoSe₂

et al. 2022

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“…In their analysis, Naftaly et al showed that PMMA and HDPE achieve a refractive index of 1.61 and 1.54, where the reported absorption coefficients of these two materials are 7.5 and 0.225 cm −1 , respectively. Recently, Shi et al [17] performed an optical and electrical characterization on PMMA for the application of broadband absorbers. In 2012, an experiment on different polymer materials was also carried out [35], where a refractive index of 1.61, and 1.54 for PMMA and HDPE having corresponding absorption coefficients of 7.5, and 0.225 cm −1 respectively were obtained.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Glass and Polymers: Determining the Optimal Material for Potential Use in Terahertz Technology

et al. 2020

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The optical properties of polymers and glasses useful for terahertz applications are experimentally characterized using terahertz time-domain spectroscopy (THz-TDS). A standard system setup utilizing transmission spectroscopy is used to measure different optical properties of materials including refractive index, relative permittivity, loss tangent, absorption coefficient, and transmittance. The thermal and chemical dependencies of materials are also studied to identify the appropriate materials for given terahertz applications. The selected materials can then be utilized for applications such as in waveguides, filters, lenses, polarization preserving devices, metamaterials and metasurfaces, absorbers, and sensors in the terahertz frequency range.INDEX TERMS Spectroscopy, terahertz materials, materials preparation, absorption, chemical analysis, thermal analysis.

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“…71 As mentioned, the E g of PMMA and PMMA/CoFe 2 O 4 composites is in the range of UV, thus, the only cause of the THz wave absorption is the vibrations along the covalent bonds rather than the electronic transitions. 71,72 Regarding the band-like features around $2.2 and 2.6 THz, they may be assigned to the rotor motion of the methyl groups and the wagging vibrations of the carboxylic groups, respectively. 68 The α values Figure 8C,D displays the real ε 0 and imaginary ε 00 dielectric parts of pure PMMA, as well as those filled with CoFe 2 O 4 which are calculated from Equation (17).…”

Section: Estimation Of Band Gap By Absorption Spectra Fittingmentioning

confidence: 90%

Greener synthesis of lightweight, self‐standing PMMA/CoFe₂O₄ polymeric film for magnetic, electronic, and terahertz shielding applications

Mohamed

Ahmad

Hameed

2023

Polymers for Advanced Techs

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This work aims to develop a multifunctional PMMA/CoFe 2 O 4 polymeric film of low loss dielectric constant, high magnetic properties, and perceptible terahertz shielding effectiveness. Pure cobalt ferrite magnetic nanoparticles (CoFe 2 O 4 MNPs) were prepared by a facile-modified solution deposition method. Then, the nanoparticles were loaded to poly (methyl methacrylate) of different ratios (x = 0, 5, 10, 15, and 20 wt%) to synthesize films by evaporative casting technique. X-ray diffraction (XRD) evidenced the formation of CoFe 2 O 4 MNPs in the cubic spinal structure. The FTIR confirmed the interaction of CoFe 2 O 4 MNPs with PMMA chains. Compared to the pure PMMA, the PMMA/CoFe 2 O 4 nanocomposites were more thermally stable, as evidenced by thermogravimetric analysis, (TGA) and differential scanning calorimetry (DSC). The micrograph images by FESEM unraveled that CoFe 2 O 4 MNPs have formed in different geometrical shapes (nanocubes, nanotubes, and nano oval). The values of the band gap energy were computed by the absorption spectra fitting (ASF) method. It varied from 4.94 to 4.68 eV, as the CoFe 2 O 4 MNPs contents were changed from 0 to 20 wt%. Compared to host PMMA, the dielectric permittivity was enhanced, while the dielectric loss was slightly decreased. Therefore, the prepared film can be employed as a passive component in electronic circuits, namely capacitors and supercapacitors. The shielding effectiveness (SE) was found to be improved with frequency and CoFe 2 O 4 content, reflecting the applicability of PMMA/CoFe 2 O 4MNPs films in terahertz shielding. The magnetic parameters were investigated by a vibrating sample magnetometer (VSM) and were found to increase with CoFe 2 O 4 content, which could be used as a flexible film in magnetic applications.

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Optical and Electrical Characterization of Pure PMMA for Terahertz Wide-band Metamaterial Absorbers

Cited by 23 publications

References 36 publications

Revealing the impact of strain in the optical properties of bubbles in monolayer MoSe₂

Revealing the impact of strain in the optical properties of bubbles in monolayer MoSe₂

Experimental Study on Glass and Polymers: Determining the Optimal Material for Potential Use in Terahertz Technology

Greener synthesis of lightweight, self‐standing PMMA/CoFe₂O₄ polymeric film for magnetic, electronic, and terahertz shielding applications

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Optical and Electrical Characterization of Pure PMMA for Terahertz Wide-band Metamaterial Absorbers

Cited by 23 publications

References 36 publications

Revealing the impact of strain in the optical properties of bubbles in monolayer MoSe2

Revealing the impact of strain in the optical properties of bubbles in monolayer MoSe2

Experimental Study on Glass and Polymers: Determining the Optimal Material for Potential Use in Terahertz Technology

Greener synthesis of lightweight, self‐standing PMMA/CoFe2O4 polymeric film for magnetic, electronic, and terahertz shielding applications

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Product

Resources

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Revealing the impact of strain in the optical properties of bubbles in monolayer MoSe₂

Revealing the impact of strain in the optical properties of bubbles in monolayer MoSe₂

Greener synthesis of lightweight, self‐standing PMMA/CoFe₂O₄ polymeric film for magnetic, electronic, and terahertz shielding applications