Manipulation of light beam propagation in one-dimensional photonic lattices with linear refractive index profile

2015 ◽  
Vol 335 ◽  
pp. 194-198 ◽  
Author(s):  
Ana Radosavljević ◽  
Goran Gligorić ◽  
Aleksandra Maluckov ◽  
Milutin Stepić
Keyword(s):  
Refractive Index ◽  
Light Beam ◽  
Beam Propagation ◽  
Refractive Index Profile ◽  
Index Profile ◽  
One Dimensional ◽  
Photonic Lattices ◽  
Linear Refractive Index

Optical one-dimensional waveguides in oxyfluoride glass fabricated by Helium Ion implantation

2022 ◽  
Author(s):  
Shu-Dong Xing ◽  
Hao-Yang Yin ◽  
Tong Wang ◽  
Liao-Lin Zhang ◽  
Qing-Yang Yue ◽  
...  
Keyword(s):  
Refractive Index ◽  
Ion Implantation ◽  
Refractive Index Profile ◽  
Photonic Devices ◽  
Refractive Indices ◽  
Oxyfluoride Glass ◽  
Index Profile ◽  
One Dimensional ◽  
Coupling System ◽  
Helium Ion

In this work, a one-dimensional waveguide is formed by virtue of the helium ion implantation in the oxyfluoride glass (OFG). The energy and the fluence of the ion implantation are 0.4 MeV and [Formula: see text] [Formula: see text], respectively. The m-line curve with the effective refractive indices of the modes was recorded by using the prism coupling system. The energy loss distribution and the refractive index profile were calculated by the stopping and range of ions into matter (SRIM)-2013 and the RCM, respectively. The light modal profile was measured by the end-facet coupling system. It suggests that the He[Formula: see text]-ion implanted OFG waveguides have the potential to act as integrated photonic devices.

ON THE SWING EFFECT OF SPATIAL INHOMOGENEOUS NLS SOLITONS

2001 ◽  
Vol 10 (02) ◽  
pp. 143-152 ◽  
Author(s):  
A. SURYANTO ◽  
E. VAN GROESEN
Keyword(s):  
Refractive Index ◽  
Maxwell Equation ◽  
Small Perturbation ◽  
Displacement Vector ◽  
Refractive Index Profile ◽  
Spatial Soliton ◽  
Index Profile ◽  
Nls Equation ◽  
Linear Refractive Index ◽  
Proposed Model

In this paper, we consider the propagation of a spatial soliton in a waveguide with triangular linear refractive index profile. We propose a model that is obtained by starting with a small perturbation of the constant linear refractive index in the displacement vector of the Maxwell equation, and then deriving the NLS equation for this case. Using this model it is shown, both analytically and numerically, that the soliton beam oscillates inside the waveguide. This is as expected, but differs from the model found in the literature in which the inhomogeneity is introduced directly in the standard NLS equation. Finally, the proposed model is used to study the breakup of bound N-soliton in a triangular waveguide.

scholarly journals Extension of an FFT-Based Beam Propagation Method to Plasmonic and Dielectric Waveguide Discontinuities and Junctions

2019 ◽  
Vol 9 (20) ◽  
pp. 4362 ◽  
Author(s):  
Adel Shaaban ◽  
Yi-Chun Du ◽  
Lotfy Rabeh Gomaa
Keyword(s):  
Refractive Index ◽  
Dielectric Waveguide ◽  
Beam Propagation Method ◽  
Beam Propagation ◽  
Refractive Index Profile ◽  
Smoothing Function ◽  
Plasmonic Waveguides ◽  
Index Profile ◽  
Metal Insulator Metal ◽  
Waveguide Discontinuities

We adapted a fast Fourier transform-based Beam Propagation Method (FFT-BPM) to investigate waveguide discontinuities in plasmonic waveguides. The adaptation of the FFT-BPM to treat transverse magnetic (TM) fields requires the circumvention of two major difficulties: the mixed derivatives of the magnetic field and waveguide refractive index profile in the TM wave equation and the step-like index change at the transverse metal-dielectric boundary of the plasmonic guide and the transverse boundaries of the dielectric waveguide as well. An equivalent-index method is adopted to transform TM fields to transverse electric (TE) ones, thus enabling the benefit of the full power and simplicity of the FFT-BPM. Moreover, an appropriate smoothing function is used to approximate the step-like refractive index profile in the transverse direction. At the junction plane, we used an accurate combined spatial-spectral reflection operator to calculate the reflected field. To validate our proposed scheme, we investigated the modal propagation in a silicon waveguide terminated by air (like a laser facet in two cases: with and without a coating layer). Then we considered a subwavelength plasmonic waveguide (metal-insulator-metal MIM) butt-coupled with a dielectric waveguide, where the power transmission efficiency has been calculated and compared with other numerical methods. The comparison reveals good agreement.

scholarly journals Influence of Rugate Filters on the Spectral Manifestation of Tamm Plasmon Polaritons

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1282
Author(s):  
Victor Reshetnyak ◽  
Igor Pinkevych ◽  
Timothy Bunning ◽  
Dean Evans
Keyword(s):  
Refractive Index ◽  
Band Gap ◽  
External Medium ◽  
Metal Layer ◽  
Refractive Index Profile ◽  
Spectral Position ◽  
Index Profile ◽  
Reflection And Transmission ◽  
Rugate Filter ◽  
Plasmon Polaritons

This study theoretically investigated light reflection and transmission in a system composed of a thin metal layer (Ag) adjacent to a rugate filter (RF) having a harmonic refractive index profile. Narrow dips in reflectance and peaks in transmittance in the RF band gap were obtained due to the excitation of a Tamm plasmon polariton (TPP) at the Ag–RF interface. It is shown that the spectral position and magnitude of the TPP dips/peaks in the RF band gap depend on the harmonic profile parameters of the RF refractive index, the metal layer thickness, and the external medium refractive index. The obtained dependences for reflectance and transmittance allow selecting parameters of the system which can be optimized for various applications.

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