Photonic Crystals Based on Periodic Arrays of MWCNTs: Modeling and Simulation

Shamsollahi, Y.; Moravvej-Farshi, Mohammad Kazem; Ebnali-Heidari, Majid

doi:10.1109/jlt.2013.2261952

Cited by 6 publications

(4 citation statements)

References 33 publications

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“…As a consequence, Eq. (1) e CNT \ are adopted as presented in [3,26] and they are derived based on the literature data available for ordinary and extraordinary dielectric functions of bulk graphite. The limitations in spectral range for these datasets are the reason why the proposed EMT model is not extended to mid-and far-infrared range.…”

Section: Effective Medium Theory Modelmentioning

confidence: 99%

“…In case of single-walled carbon nanotubes, the characteristic features of their optical spectra can be correlated with theoretical interband transitions and are very sensitive to chiral indices describing a nanotube [1,2]. For multi-walled carbon nanotubes (MWCNTs) with diameters larger than few nanometers, the curvature effects can be neglected and optical properties of a single MWCNT can be derived from the dielectric functions of bulk graphite [3]. The anisotropy of both a nanotube (high aspect ratio) and graphite properties is the reason why the overall way carbon nanotubes interact with electromagnetic waves depending on their specific arrangement in an investigated sample.…”

Section: Introductionmentioning

confidence: 99%

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Ultraviolet to far-infrared transmission properties of thin film multi-walled carbon nanotube random networks

et al. 2016

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Thin films of multi-walled carbon nanotubes forming random networks were produced by vacuum filtration method, and their broadband electromagnetic radiation transmittance spectra are presented. Thickness of the nanotube films was between 100 nm and 1 lm, and the transmission properties are demonstrated for the wavelength range from 300 nm to 400 lm. It is observed that transmittance is an increasing function of a radiation wavelength, and for the thickest films it almost saturates above 1 lm wavelength. To explain the experimental results in the ultraviolet-near infrared range, we employed effective medium theory (in the form of symmetric Bruggeman model) correlating properties of multi-walled carbon nanotubes with the effective dielectric function of a nanotube network. The optical properties of a single multi-walled carbon nanotube that were used for calculations were based on ordinary and extraordinary dielectric functions of bulk graphite. The proposed theoretical model has been successfully fitted to the experimental results. It has been also found that despite the fact that radiation undergoes multiple internal reflections at the film interfaces, the transmittance-thickness relation can be still described by exponential decay.

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Section: Effective Medium Theory Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultraviolet to far-infrared transmission properties of thin film multi-walled carbon nanotube random networks

et al. 2016

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“…A starting point for both cases is an assumption that a single CNT can be modelled as a homogeneous hollow cylinder described by an inner and an outer radius and with the optical properties derived from bulk graphite [8]. If the investigated CNTs array is periodic in space (which is achieved by periodic patterning of catalyst particles before the growth process) then the full information about the radiation * corresponding author; e-mail: wasik@if.pw.edu.pl propagating in the system can be obtained by numerical solving of the Maxwell equations with the use of finite difference time domain method [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Optical Interference Effects in Visible-Near Infrared Spectral Range for Arrays of Vertically Aligned Multiwalled Carbon Nanotubes

et al. 2017

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Based on the reflectance spectra for radiation wavelength from about 380 nm to 1.8 µm, the optical interference effects in vertically aligned multiwalled carbon nanotubes films are studied. We performed the measurements for two complementary polarization states of incoming radiation (s-and p-polarization) for nanotubes arrays sparse enough for interference effects to be possible to observe. By performing the measurements for different wavelengths and incidence angles, we mapped the evolution of interference maxima/minima of reflectance signal. The results from this novel approach indicate that for the radiation polarized perpendicularly to tubes axis (s-polarization), the real part of the effective refractive index can be estimated from the classic Fabry-Pérot model. In order to describe the differences between spectra obtained for s-and p-polarizations we discuss the most important factors that affect the reflectance signal in case of investigated nanotubes arrays.

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“…Interesting optical properties as well as excellent electrical features of carbon nanotubes combining with regular array structure have been demonstrated for fascinating applications such as electrodes [13,14], gas sensors [15,16], and optical antenna arrays [17][18][19]. It was reported that periodic arrays of CNT could serve as photonic crystals (PCs) [20][21][22] which were testified for many important effects and applications with a spatial periodicity in dielectric constant. In terms of MWCNT-based photonic crystals, however, little has been done.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of polarization beam splitter with triangular lattice of multi-walled carbon nanotube arrays

Yun

Wang

et al. 2015

Optics Communications

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Photonic Crystals Based on Periodic Arrays of MWCNTs: Modeling and Simulation

Cited by 6 publications

References 33 publications

Ultraviolet to far-infrared transmission properties of thin film multi-walled carbon nanotube random networks

Ultraviolet to far-infrared transmission properties of thin film multi-walled carbon nanotube random networks

Optical Interference Effects in Visible-Near Infrared Spectral Range for Arrays of Vertically Aligned Multiwalled Carbon Nanotubes

Numerical simulation of polarization beam splitter with triangular lattice of multi-walled carbon nanotube arrays

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