High-frequency ultrasonic sensor arrays based on optical micro-ring resonators

2018 ◽  
Author(s):  
Abhishek Amrithanath ◽  
Sridhar Krishnaswamy ◽  
Heming Wei
Keyword(s):  
High Frequency ◽  
Sensor Arrays ◽  
Ultrasonic Sensor ◽  
Ring Resonators

High Frequency Generation Based-On Nonlinear Micro Ring Resonator for Frequency Band Enhancement

2014 ◽  
Vol 979 ◽  
pp. 508-511
Author(s):  
Pongputhai Udomariyasap ◽  
Suthichai Noppanakeepong ◽  
Nithiroth Pornsuwancharoen
Keyword(s):  
Channel Capacity ◽  
Optical Communication ◽  
High Frequency ◽  
Ring Resonator ◽  
Ring Resonators ◽  
Small Device ◽  
Specific Frequency ◽  
Frequency Generation ◽  
Resonator System ◽  
Signal Filter

Propose the simulation of THz carrier frequencies using the small device and a Gaussian beam propagating within the device system. We found that the generated output power with the high frequency can be achieved. This consisted of a serial nonlinear micro ring resonator system for generating pulse and signal filter by Add/Drop filter, a technology optical communication by the micro ring resonator which generates the THz frequency multiple, whereas channel capacity in term of multi frequency bands can be provided by optical Add/Drop multiplexing. The increase in the number of channel capacity can be obtained by the increase in frequency density, while the security was introduced by the specific frequency filter, which was operated by the central operator. The optical micro ring resonators for THz frequency generation and enhancement are reviewed. The advantage of proposed system can be implemented by using the simultaneous optical communication system.

Nonlinear imaging of damage in composite structures using sparse ultrasonic sensor arrays

2016 ◽  
Vol 24 (5) ◽  
pp. e1911 ◽  
Author(s):  
F. Ciampa ◽  
Simon G. Pickering ◽  
Gennaro Scarselli ◽  
M. Meo
Keyword(s):  
Composite Structures ◽  
Sensor Arrays ◽  
Ultrasonic Sensor ◽  
Nonlinear Imaging

scholarly journals High-Frequency Fiber-Optic Ultrasonic Sensor Using Air Micro-Bubble for Imaging of Seismic Physical Models

Sensors ◽  
2016 ◽  
Vol 16 (12) ◽  
pp. 2125 ◽  
Author(s):  
Tingting Gang ◽  
Manli Hu ◽  
Qiangzhou Rong ◽  
Xueguang Qiao ◽  
Lei Liang ◽  
...  
Keyword(s):  
High Frequency ◽  
Fiber Optic ◽  
Ultrasonic Sensor ◽  
Physical Models ◽  
Micro Bubble

UNDERWATER GROUND MAPPING FOR FLOOD DISASTER USING ULTRASONIC SENSOR

2016 ◽  
Vol 78 (7-4) ◽  
Author(s):  
Salman Sayyidi Hamzah ◽  
Mohd Hafiz Fazalul Rahiman ◽  
Mohd Hajazi Mustafa ◽  
Mohd Azrul Amat ◽  
Lean Thiam Siow ◽  
...  
Keyword(s):  
Current Flow ◽  
Sensor Arrays ◽  
Current Method ◽  
Ultrasonic Sensor ◽  
Flood Disaster ◽  
Depth Information ◽  
Water Tank ◽  
Guide Line ◽  
Flood Current ◽  
The Right

Search and Rescue (SAR) team used dip stick to measure the water depth and identify the badly eroded area and a guide line will be placed to assist them. However, ground erosion is unpredictable coupled with unknown sizes make the SAR task more difficult thus posing grave danger to SAR team in action. Therefore, this current method is no longer reliable because the flood current will swipe it away and rendered the guide line to be unfeasible over time consuming. A system proposed in this study was developed using ultrasonic sensor array to reconstruct the ground map in flood area. It consists of several sensor arrays to collect the underwater depth information and convert them into mapping data before relaying them to ground station. The results then will help the SAR team to identify the safe path to reach for the flood victims. The factor to focus on is the depth of the flood, the current flow and the medium that the wave will go through. The current flow will be the main threat because the sensor needs to be on the right angle to get the accurate reading. The data then will be transfer to excel to start the mapping for underwater ground. Based on the result from the prototype testing conducted using water tank, sensors can be installed to get wider map view and mapping can be improved by using multi-angle shapes for it to be more accurate in flood disaster. 

scholarly journals Dual Toroidal Dipole Resonance Metamaterials under a Terahertz Domain

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2036 ◽  
Author(s):  
Shuang Wang ◽  
Song Wang ◽  
Quan Li ◽  
Xiaoli Zhao ◽  
Jianyu Zhu
Keyword(s):  
High Frequency ◽  
Coupling Effect ◽  
Energy Levels ◽  
Low Frequency ◽  
Ring Resonators ◽  
Multipole Interaction ◽  
Practical Applications ◽  
Dipole Resonance ◽  
Potential Applications ◽  
Quality Factor Q

We proposed and fabricated a flexible, planar, U-shape-modified structure metamaterial (MM) that was composed of two metallic pattern layers separated by a polyimide layer, where each metallic pattern layer consists of two U-shaped split ring resonators (USRRs). The coupling effect between the two USRRs in the same metallic layer was vital to the formation of dual toroidal dipole (TD) resonances. The measured and simulated results showed that both low quality factor (Q) (~1.82) and high Q (~10.31) TD resonances were acquired synchronously at two different frequencies in the MMs by adjusting the distance between the two coplanar USRRs. With the interaction of the USRRs, the energy levels of the USRRs were split into inductance-capacitance (LC)-induced TD resonance at low frequency and dipole-induced TD resonance at high frequency. Thus, the electric multipole interaction played an important role in determining the energy level of the TD resonance. The better strength of the high frequency TD resonance can be confined to an electromagnetic field inside a smaller circular region, and thus, a higher Q was obtained. In order to investigate the TD mechanism more in depth, the power of the electric dipole, magnetic dipole, electric circular dipole, and TD were quantitatively calculated. Dual TD MMs on a freestanding substrate will have potential applications in functional terahertz devices for practical applications.

scholarly journals A 4 × 4 Array of Complementary Split-Ring Resonators for Label-Free Dielectric Spectroscopy

Chemosensors ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 348
Author(s):  
Matko Martinic ◽  
Tomislav Markovic ◽  
Adrijan Baric ◽  
Bart Nauwelaers
Keyword(s):  
Dielectric Spectroscopy ◽  
Large Scale ◽  
Printed Circuit Board ◽  
Sensor Arrays ◽  
Split Ring Resonator ◽  
Circuit Board ◽  
Ring Resonators ◽  
Label Free ◽  
Split Ring ◽  
Complementary Split Ring Resonator

In this study, complementary split-ring resonator (CSRR) metamaterial structures are proposed for label-free dielectric spectroscopy of liquids in microplates. This novel combination of an array of sensors and microplates is readily scalable and thus offers a great potential for non-invasive, rapid, and label-free dielectric spectroscopy of liquids in large microplate arrays. The proposed array of sensors on a printed circuit board consists of a microstrip line coupled to four CSRRs in cascade with resonant frequencies ranging from 7 to 10 GHz, spaced around 1 GHz. The microwells were manufactured and bonded to the CSRR using polydimethylsiloxane, whose resonant frequency is dependent on a complex relative permittivity of the liquid loaded in the microwell. The individual microstrip lines with CSRRs were interconnected to the measurement equipment using two electronically controllable microwave switches, which enables microwave measurements of the 4 × 4 CSRR array using only a two-port measurement system. The 4 × 4 microwell sensor arrays were calibrated and evaluated using water-ethanol mixtures with different ethanol concentrations. The proposed measurement setup offers comparable results to ones obtained using a dielectric probe, confirming the potential of the planar sensor array for large-scale microplate experiments.

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