Passive Components Blog
No Result
View All Result
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Circuit Protection Devices
    • electro-mechanical news
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • inter-connect news
    • Market & Supply Chain
    • Market Insights
    • Medical
    • Modelling and Simulation
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors News
    • Resistors
    • RF & Microwave
    • Telecommunication
    • Weekly Digest

    Bourns Extends Rotational Life Option for its Guitar Potentiometer

    Modeling and Simulation of Leakage Inductance

    Power Inductor Considerations for AI High Power Computing – Vishay Video

    TAIYO YUDEN Releases Compact SMD Power Inductors for Automotive Application

    Fischer Releases High Vibration Robust Ratchet Locking USB-C Connector System

    Littelfuse Unveils High-Use Tactile Switches with 2 Million Cycle Lifespan

    KYOCERA AVX Releases Compact High-Directivity Couplers

    Supercapacitors Emerge as a Promising Solution to AI-Induced Power Energy Spikes

    Wk 18 Electronics Supply Chain Digest

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Circuit Protection Video
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Inter-Connect Video
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos

    Modeling and Simulation of Leakage Inductance

    Power Inductor Considerations for AI High Power Computing – Vishay Video

    Coupled Inductors in Multiphase Boost Converters

    VPG Demonstrates Precision Resistor in Cryogenic Conditions

    Comparison Testing of Chip Resistor Technologies Under High Vibration

    EMC Challenges for High Speed Signal Immunity and Low EMI

    MOSFET Gate Drive Resistors Power Losses

    Modified Magnetic Reluctance Equivalent Circuit and its Implications

    Improving Common Mode Noise Reduction while Decreasing BOM

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Suppliers
    • Who is Who
  • Events
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Circuit Protection Devices
    • electro-mechanical news
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • inter-connect news
    • Market & Supply Chain
    • Market Insights
    • Medical
    • Modelling and Simulation
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors News
    • Resistors
    • RF & Microwave
    • Telecommunication
    • Weekly Digest

    Bourns Extends Rotational Life Option for its Guitar Potentiometer

    Modeling and Simulation of Leakage Inductance

    Power Inductor Considerations for AI High Power Computing – Vishay Video

    TAIYO YUDEN Releases Compact SMD Power Inductors for Automotive Application

    Fischer Releases High Vibration Robust Ratchet Locking USB-C Connector System

    Littelfuse Unveils High-Use Tactile Switches with 2 Million Cycle Lifespan

    KYOCERA AVX Releases Compact High-Directivity Couplers

    Supercapacitors Emerge as a Promising Solution to AI-Induced Power Energy Spikes

    Wk 18 Electronics Supply Chain Digest

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Circuit Protection Video
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Inter-Connect Video
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos

    Modeling and Simulation of Leakage Inductance

    Power Inductor Considerations for AI High Power Computing – Vishay Video

    Coupled Inductors in Multiphase Boost Converters

    VPG Demonstrates Precision Resistor in Cryogenic Conditions

    Comparison Testing of Chip Resistor Technologies Under High Vibration

    EMC Challenges for High Speed Signal Immunity and Low EMI

    MOSFET Gate Drive Resistors Power Losses

    Modified Magnetic Reluctance Equivalent Circuit and its Implications

    Improving Common Mode Noise Reduction while Decreasing BOM

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Suppliers
    • Who is Who
  • Events
No Result
View All Result
Passive Components Blog
No Result
View All Result

New diode features optically controlled capacitance

7.6.2017
Reading Time: 2 mins read
A A

source: Phys.org news

A team of researchers at the Israel Institute of Technology has developed a new capacitor with a metal-insulator-semiconductor (MIS) diode structure that is tunable by illumination. The capacitor, which features embedded metal nanoparticles, is similar to a metal-insulator-metal (MIM) diode, except that the capacitance of the new device depends on illumination and exhibits a strong frequency dispersion, allowing for a high degree of tunability.

RelatedPosts

Bourns Extends Rotational Life Option for its Guitar Potentiometer

Modeling and Simulation of Leakage Inductance

Power Inductor Considerations for AI High Power Computing – Vishay Video

This new capacitor has the potential to enhance wireless capability for information processing, sensing and telecommunications. The researchers report their findings this week in the Journal of Applied Physics.

“We have developed a capacitor with the unique ability to tune the capacitance by large amounts using light. Such changes are not possible in any other device,” said Gadi Eisenstein, professor and director of the Russell Berrie Nanotechnology Institute at the Technion Israel Institute of Technology in Haifa and a co-author of the paper. “The observed photo sensitivity of this MIS diode structure expands its potential in optoelectronic circuits that can be used as a light-sensitive variable capacitor in remote sensing circuits.”

MIM diodes are common elements in electronic devices, especially those utilizing radio frequency circuits. They comprise thin-film metal plate electrodes that are separated by an insulator. Like the MIM structure, the researchers’ new MIS capacitor is bias independent, meaning the constant capacitance is independent of its supply voltage. Bias-independent capacitors are important for high linearity, and therefore straightforward predictability, of circuit performance.

“We have demonstrated that our MIS structure is superior to a standard MIM diode,” said Vissarion (Beso) Mikhelashvili, senior research fellow at the Israel Institute of Technology and also a co-author of the paper. “On one hand, it has all the features of an MIM device, but the voltage independent capacitance is tunable by light, which means that the tuning functionality can be incorporated in photonic circuits.”

“The illumination causes a twofold effect,” Eisenstein said. “First, the excitation of trap states enhances the internal polarization. Second, it increases the minority carrier density (due to photo generation) and reduces the depletion region width. This change modifies the capacitance.”

The researchers created three MIS structures, fabricated on a bulk silicon substrate, based on a multilayer dielectric stack, which consisted of a thin thermal silicon dioxide film and a hafnium oxide layer. The two layers were separated by strontium fluoride (SrF2) sublayers in which ferrum (Fe, iron) or cobalt (Co) nanoparticles were embedded.

The researchers found that the fluoridation-oxidation process of the iron atoms causes the formation of a gradient in the valence state of iron ions across the active layer, which results in the generation of an electronic polarization. The polarization causes a bias-independent depletion region and hence an MIM-type characteristic.

Four additional structures were prepared for comparison: Two lacked the SrF2 sublayers and one of them was prepared without the iron film. The other two structures contained SrF2: One did not have cobalt and the second included a one-nanometer Co layer.

The comparison with other MIS capacitors that contained the metal nanoparticles with or without the SrF2 sublayers led to the unequivocal conclusion that only devices consisting of the combination of Fe and SrF2 turn the MIS structure into a photo-sensitive MIM-like structure.

featured image credit: Petr Kratochvil/public domain 

 

Related

Recent Posts

KYOCERA AVX Releases Compact High-Directivity Couplers

7.5.2025
16

Supercapacitors Emerge as a Promising Solution to AI-Induced Power Energy Spikes

6.5.2025
36

Murata and NIMS Built New Database of Dielectric Material Properties

5.5.2025
46

Tariffs Crush Sales Sentiment in April 2025 ECST Results

5.5.2025
61

Solid State Polymer Multilayer Capacitors For High Temperature Application

2.5.2025
32

Graphene-Based BOSC Bank Of Supercapacitor Cells

2.5.2025
13

Hybrid Energy Storage System for Nanosatellite Applications

1.5.2025
9

COTS-Plus Bulk Tantalum Capacitor for LEO Flight Platforms

29.4.2025
38

High Energy Density Supercapacitors for Space Applications

28.4.2025
35

Highly Integrated W-Band Circulators Based on SIW Technology

28.4.2025
1

Upcoming Events

May 14
11:00 - 12:00 CEST

Reliable RIGID.flex PCBs for Critical Applications – Made in Europe

May 14
17:00 - 17:30 CEST

Calculating Foil Winding Losses with AI

May 28
16:00 - 17:00 CEST

Power Over Data Line

View Calendar

Popular Posts

  • Buck Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Boost Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Flyback Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • What is a Dielectric Constant and DF of Plastic Materials?

    4 shares
    Share 4 Tweet 0
  • Dual Active Bridge (DAB) Topology Explained

    0 shares
    Share 0 Tweet 0
  • Ripple Current and its Effects on the Performance of Capacitors

    3 shares
    Share 3 Tweet 0
  • SEPIC Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Solid State Polymer Multilayer Capacitors For High Temperature Application

    0 shares
    Share 0 Tweet 0
  • LLC Resonant Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • MLCC Case Sizes Standards Explained

    0 shares
    Share 0 Tweet 0

Newsletter Subscription

 

Passive Components Blog

© EPCI - Leading Passive Components Educational and Information Site

  • Home
  • Privacy Policy
  • EPCI Membership & Advertisement
  • About

No Result
View All Result
  • Home
  • Knowledge Blog
  • Premium Suppliers

© EPCI - Leading Passive Components Educational and Information Site

This website uses cookies. By continuing to use this website you are giving consent to cookies being used. Visit our Privacy and Cookie Policy.
Go to mobile version