scholarly journals Low Threshold, Wide Dynamic Range, Tunable, All-Optical Self-Modulator Based on Fano Resonance and Out-of-Plane Coupling in a Slab Photonic Crystal with a Graphene Layer

2015 ◽  
Vol 2015 ◽  
pp. 1-6
Author(s):  
Reza Asadi ◽  
Zhengbiao Ouyang
Keyword(s):  
Photonic Crystal ◽  
Fano Resonance ◽  
Dynamic Range ◽  
Resonance Effect ◽  
Kerr Nonlinearity ◽  
Optical Modulator ◽  
Wide Dynamic Range ◽  
One Dimensional ◽  
All Optical ◽  
Low Threshold

We demonstrate an all-optical modulator based on self-modulation in a one-dimensional slab photonic crystal (PhC) by using optical Kerr nonlinearity of graphene and Fano resonance effect. It has been shown that the effect of Fano resonance in a one-dimensional slab PhC for intensity enhancement can provide low threshold (~1 MW/cm2), high frequency (>1 THz), and wide dynamic range (>3 THz) tunability for the all-optical self-modulator. Such a self-modulator can find applications in optical pulse generations, optical clocks, frequency shifting, and so forth.

Design and Simulation of a Fast All-Optical Modulator Based on Photonic Crystal Using Ring Resonators

Silicon ◽  
2021 ◽  
Author(s):  
Mohammad Moradi ◽  
Masoud Mohammadi ◽  
Saeed Olyaee ◽  
Mahmood Seifouri
Keyword(s):  
Photonic Crystal ◽  
Ring Resonators ◽  
Optical Modulator ◽  
All Optical

scholarly journals Slow light bimodal interferometry in one-dimensional photonic crystal waveguides

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Luis Torrijos-Morán ◽  
Amadeu Griol ◽  
Jaime García-Rupérez
Keyword(s):  
Photonic Crystal ◽  
Group Velocity ◽  
Communication Networks ◽  
Slow Light ◽  
Single Channel ◽  
Point Of Care ◽  
Semiconductor Industry ◽  
Optical Modulator ◽  
One Dimensional ◽  
Dimensional Photonic Crystal

AbstractStrongly influenced by the advances in the semiconductor industry, the miniaturization and integration of optical circuits into smaller devices has stimulated considerable research efforts in recent decades. Among other structures, integrated interferometers play a prominent role in the development of photonic devices for on-chip applications ranging from optical communication networks to point-of-care analysis instruments. However, it has been a long-standing challenge to design extremely short interferometer schemes, as long interaction lengths are typically required for a complete modulation transition. Several approaches, including novel materials or sophisticated configurations, have been proposed to overcome some of these size limitations but at the expense of increasing fabrication complexity and cost. Here, we demonstrate for the first time slow light bimodal interferometric behaviour in an integrated single-channel one-dimensional photonic crystal. The proposed structure supports two electromagnetic modes of the same polarization that exhibit a large group velocity difference. Specifically, an over 20-fold reduction in the higher-order-mode group velocity is experimentally shown on a straightforward all-dielectric bimodal structure, leading to a remarkable optical path reduction compared to other conventional interferometers. Moreover, we experimentally demonstrate the significant performance improvement provided by the proposed bimodal photonic crystal interferometer in the creation of an ultra-compact optical modulator and a highly sensitive photonic sensor.

Concave Rectangle Photonic Crystal Ring Resonator for Ultra-Fast All-Optical Modulation

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Sana Rebhi ◽  
Radhouene Massoudi ◽  
Monia Najjar
Keyword(s):  
Photonic Crystal ◽  
Insertion Loss ◽  
Ring Resonator ◽  
Extinction Ratio ◽  
Input Power ◽  
Light Signal ◽  
Optical Modulator ◽  
Nonlinear Photonic Crystal ◽  
All Optical ◽  
Photonic Crystal Ring Resonator

AbstractIn this paper, an ultra-fast all-optical modulator, based on a new shape of nonlinear photonic crystal ring resonator, is designed and studied. Numerical methods such as plane wave expansion (PWE) and finite-difference time domain (FDTD) are used to perform simulations. The modulation technique consists of carrier light controlling by means of input light signal and Kerr effect. The investigation of extinction ratio and insertion loss within the carrier input power shows that the choice of 0.7 W is the optimal value of that power to ensure the tradeoff between both characteristics. The suggested modulator demonstrates an excellent extinction ratio about 20.8018, a very low insertion loss of −13.98 and a short switching time about 13.4 ps. According to the obtained results, the modulator can be considered as an ultra-fast and ultra-compact optical component.

scholarly journals Ultralow-energy and high-contrast all-optical switch involving Fano resonance based on coupled photonic crystal nanocavities

2013 ◽  
Vol 21 (10) ◽  
pp. 11877 ◽  
Author(s):  
Kengo Nozaki ◽  
Akihiko Shinya ◽  
Shinji Matsuo ◽  
Tomonari Sato ◽  
Eiichi Kuramochi ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Fano Resonance ◽  
Optical Switch ◽  
High Contrast ◽  
Ultralow Energy ◽  
All Optical ◽  
All Optical Switch

A defective one-dimensional superconducting photonic crystal design for the generation of the Fano resonance feature

2020 ◽  
Vol 95 (11) ◽  
pp. 115503
Author(s):  
Asmaa M Mohamed ◽  
Walied Sabra ◽  
Arafa H Aly ◽  
M Mobarak ◽  
A S Shalaby
Keyword(s):  
Photonic Crystal ◽  
Fano Resonance ◽  
One Dimensional ◽  
Crystal Design ◽  
Superconducting Photonic Crystal

Wide Dynamic Range Sensing in Photonic Crystal Microcavity Biosensors

CLEO: 2014 ◽  
2014 ◽  
Author(s):  
Chun-Ju Yang ◽  
yi zou ◽  
Swapnajit Chakravarty ◽  
Hai Yan ◽  
Zheng Wang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Dynamic Range ◽  
Wide Dynamic Range ◽  
Range Sensing ◽  
Photonic Crystal Microcavity

COSMIC RAY MUON MEASUREMENT BY L3 SPECTROMETER AT CERN

2001 ◽  
Vol 16 (26) ◽  
pp. 1667-1670
Author(s):  
◽  
YUQIAN MA
Keyword(s):  
Dynamic Range ◽  
Cosmic Ray ◽  
Charge Ratio ◽  
Muon Spectrum ◽  
Wide Dynamic Range ◽  
Air Shower ◽  
System A ◽  
First Results ◽  
Low Threshold ◽  
Shower Array

L3 + C is a branch experiment on L3 magnet spectrometer, which is located on the ring of LEP accelerator at CERN. To take the advantage of L3 muon chambers in its low threshold, wide dynamic range and high resolution, the momentum of cosmic ray muons in the range of 15–2000 GeV/c at a shallow depth of 30 m of molasse can be measured precisely. Since 1998, a scintillator detector system, a new fast trigger and DAQ system, and a small air shower array had been established for study the CR muon events independently. Up to August 2000, 8 billion muons and 25 million air shower events had been recorded. The first results for CR muon spectrum and the charge ratio etc. had been obtained.

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