Sharif Digital Repository

General solution to wave propagation in media undergoing arbitrary transient or periodic temporal variations of permittivity

Author

Chegnizadeh, M.

Publisher

OSA - The Optical Society,

Pub. Year

2018

Subjects

Wave propagation. / Arbitrary time. / Bragg conditions. / Closed-form expression. / Energy density. / General solutions. / Numerical solution. / Periodic variation. / Temporal variation. / Permittivity.

Frequency conversion and parametric amplification using a virtually rotating metasurface

Author

Seyedrezaei, Z.

Publisher

OSA - The Optical Society,

Pub. Year

2020

Subjects

Electromagnetic wave polarization. / Electromagnetic waves. / Surface scattering. / Time varying systems. / Circularly polarized electromagnetic waves. / Electronically tunable. / Full-wave simulations. / Linear time-varying systems. / Parametric amplification. / Piece-wise constants. / Rotation frequencies. / Surface susceptibilities. / Amplification. / Microwave radiation. / Rotation. / Simulation.

fTemporal green's dunction of an RLC resonator with arbitrary time-varying capacitance using differential transition matrix

Author

Boshgazi, S.

Publisher

IEEE,

Pub. Year

2024

Subjects

Temporal Green's Function. / Time-varying Circuit. / Transition Matrix Method. / Capacitance. / Capacitor bank. / Electric network analysis. / Electromagnetic transients. / Time domain analysis. / Transfer matrix method. / Arbitrary time. / Common ground.

Local excitation of a perfectly conducting slab with finite or infinite number of slits and the role of proper complex waves

Author

Sheikh Ansari, A.

Publisher

Institute of Electrical and Electronics Engineers Inc,

Pub. Year

2020

Subjects

Complex modes. / Extraordinary transmission (ET) / Gratings. / Green's function. / Electric excitation. / Canonical structure. / Complex waves. / Dispersion relations. / Electromagnetic response. / Even- and odd-mode. / Extraordinary transmission. / Finite number. / Infinite numbers. / Integral equations.

All-optical multi-wavelength-channel ReLU activation function

Author

Dehghani, M. M.

Pub. Year

2024

Subjects

CMOS integrated circuits. / Deep neural networks. / Multilayer neural networks. / Optical multilayers. / Optical signal processing. / Activation functions. / All optical. / Linear units. / Low power. / Low-high. / Multiwavelength. / Nonlinear activation functions. / Optical circuits. / Optical neural networks. / Wavelength channels. / Artificial intelligence software. / Bandwidth. / Controlled study. / Middle aged. / Multiclass classification. / Nerve cell network. / Nonlinear system. / Optical instrumentation. / Optics. / Simulation. / Therapy. / Velocity. / Neurons.

Analytical and rigorous method for analysis of an array of magnetically-biased graphene ribbons

Author

Rahmanzadeh, M.

Publisher

OSA - The Optical Society,

Pub. Year

2019

Subjects

Integral equations. / Analytical expressions. / Analytical method. / Anisotropic surfaces. / Closed form solutions. / Current distribution. / Full-wave simulations. / Semi-analytical methods. / Spectral effects. / Graphene.

Wide-band/angle blazed surfaces using multiple coupled blazing resonances

Author

Memarian, M.

Publisher

Nature Publishing Group,

Pub. Year

2017

Optical isolation enabled by two time-modulated point perturbations in a ring resonator

Author

Zarif, A.

Publisher

OSA - The Optical Society,

Pub. Year

2020

Subjects

Modulation. / Optical resonators. / Angular distance. / Coupled mode theory. / Modulation frequencies. / Optical isolation. / Optical isolators. / Phase difference. / Spatio temporal. / Telecommunication wavelengths. / Optical signal processing. / Human. / Telecommunication. / Thickness.

Quality improvement of millimeter-wave imaging systems using optimized dual polarized arrays

Author

Rezaei, M.

Publisher

Institute of Electrical and Electronics Engineers Inc,

Pub. Year

2021

Subjects

Antenna arrays. / Imaging systems. / Millimeter waves. / Polarization. / Slot antennas. / Cross-polarization level. / Dual polarized antennas. / Dual-polarized array. / High port isolations. / Impedance bandwidths. / Millimeter wave (MMW) / Millimeter-wave imaging systems. / Polarization patterns. / Image enhancement.

Frequency conversion in time-varying graphene microribbon arrays

Author

Salehi, M.

Publisher

Optica Publishing Group (formerly OSA),

Pub. Year

2022

Subjects

Modulation. / Analytical treatment. / Frequency conversions. / Frequency shift. / Integral multiples. / Metasurface. / Modulation frequencies. / Quasi static models. / Single layer. / Time varying. / Time-periodic modulation. / Graphene.

Design guidelines for a tunable SOI based optical isolator in a partially time-modulated ring resonator

Author

Zarif, A.

Publisher

Institute of Electrical and Electronics Engineers Inc,

Pub. Year

2022

Subjects

Non-reciprocity. / photonic integrated circuits. / Economic and social effects. / Insertion losses. / Modulation. / Optical resonators. / Optical signal processing. / Photonic devices. / Photonic integration technology. / Sensitivity analysis. / Silicon. / Timing circuits. / Modulation parameters. / Optical isolators. / Photonics Integrated Circuits. / Resonance frequencies. / Ring resonator. / Silicon ring resonator. / Time-modulated silicon ring resonator. / Trade off. / Tunables. / Natural frequencies.

Virtual reservoir computer using an optical resonator

Author

Boshgazi, S.

Publisher

The Optical Society,

Pub. Year

2022

Subjects

Benchmarking. / Computational complexity. / Equalizers. / Memory architecture. / Network architecture. / Resonators. / Hardware implementations. / Machine learning approaches. / Memory capacity. / Neural-networks. / Nonlinear channels equalization. / Performance. / Reservoir Computing. / Signal classification. / Training algorithms. / Virtual architecture. / Recurrent neural networks.