Connect with us

Nano Technology

Storing information with light: photo-ferroelectric materials

Avatar

Published

on

Jan 20, 2021 (Nanowerk News) Can you imagine controlling the properties of a material by just shining light on it? We are used to see that the temperature of materials increases when exposed to the sun. But light may also have subtler effects. Indeed, light photons can create pairs of free charge carriers in otherwise insulating materials. This is the basic principle of the photovoltaic panels we use to harvest electrical energy from sun. In a new twist, a light-induced change of materials’ properties could be used in memory devices, allowing more efficient storage of information and faster access and computing. This, in fact, is one of our society’s current challenge: being able to develop high-performance commercially available electronic devices which are, at the same time, energy efficient. Smaller electronic devices having lower energy consumption and high performance and versatility. Now, researchers from the Institute of Materials Science of Barcelona (ICMAB, CSIC) have studied photoresponsive ferroelectric materials integrated in devices exploiting nanotechnologies and quantum effects. Memory elements have been engineered to store non-volatile information in distinct resistance states (ON/OFF). It has been discovered that, when properly designed, their electrical resistance can be modulated by pulsed light. This means that they can switch from a low-resistance to a high-resistance state just by the application of light pulses. “Materials that show changes of resistance under illumination are abundant, although the effect is typically volatile and the material recovers its initial state after some dwell time” says ICMAB researcher Ignasi Fina, co-author of the study (Nature Communications, “Non-volatile optical switch of resistance in photoferroelectric tunnel junctions”). “For devices to be used in computing and data storage, non-volatile optical control of electrical resistance is of potential interest” and adds “for non-volatile, we mean that the information can be retained stored in the device, even when the power is off”. A photon reverses the binary 0/1 state of a memory device A photon reverses the binary 0/1 state of a memory device. (Image: ICMAB) Currently two different devices are required to use optical signals for non-volatile data storage: optoelectronic sensors and memory devices. The ICMAB study features these properties in one single material able to modulate its resistance by pulsed light: a photo-ferroelectric material. Ferroelectric materials have electrically switchable spontaneous non-volatile electric polarization. In ferroelectric ultrathin films of such material sandwiched between appropriate metals, a quantum mechanical phenomenon effect appears called the tunneling current. This effect allows a charge current flow across the ferroelectric layer, which is genuinely insulating, in an amount that depends on the direction of its polarization. In the explored devices, first an electric field is used once to write the ON/OFF states, and it is combined with the optical stimulus to promote the ON/OFF change of states, and reversibly modulate the resistance (from high to low, and vice versa). These devices are energy efficient for two main reasons: firstly, the energy consumption is reduced when the memory state is written, as it does not need any charge current flow. Secondly, as the information is stored in a non-volatile manner, the state is preserved and there is no need to refresh the information (re-writing) as continuously done in current RAMs memories of all computers, for example. The observed optical switch is not restricted to the studied materials and, thus, opens a path towards further investigations on this phenomenon. As for future applications, Ignasi Fina envisions the following: “The studied devices combine light sensor and memory functions. In addition, as shown in the study, the device behaves like a memristor. A memristor is a device that can display multiple resistance states according to the stimulus it has received, and is one of the basic devices for the development of neuromorphic computing systems. Therefore, the developed device opens a path to be explored in relation to its integration into neuromorphic vision systems, where the system learns to recognize images.”

Source: https://www.nanowerk.com/nanotechnology-news2/newsid=57060.php

Nano Technology

From microsaws to nanodrills: laser pulses act as subtle machining tools: Industrial-grade materials processing on the sub-micron scale is enabled by spatially structured ultrashort laser pulses

Avatar

Published

on

If light is strongly concentrated in time and space, resulting in extreme photon densities, it can enable interaction with all conceivable materials. By using these ultrashort laser foci, even transpa… Source: http://www.nanotech-now.com/news.cgi?story_id=56578

Continue Reading

Nano Technology

Changing the silkworm’s diet to spin stronger silk

Avatar

Published

on

Tohoku University researchers have produced cellulose nanofiber (CNF) synthesized silk naturally through a simple tweak to silkworms’ diet. Mixing CNF with commercially available food and feeding the… Source: http://www.nanotech-now.com/news.cgi?story_id=56579

Continue Reading

Nano Technology

Bioinformatics tool accurately tracks synthetic: DNA Computer scientists show benefits of bioinformatics with PlasmidHawk

Avatar

Published

on

Tracking the origin of synthetic genetic code has never been simple, but it can be done through bioinformatic or, increasingly, deep learning computational approaches. Source: http://www.nanotech-now.com/news.cgi?story_id=56581

Continue Reading

Nano Technology

Quantum quirk yields giant magnetic effect, where none should exist: Study opens window into the landscape of extreme topological matter

Avatar

Published

on

In a twist befitting the strange nature of quantum mechanics, physicists have discovered the Hall effect — a characteristic change in the way electricity is conducted in the presence of a magnetic fi… Source: http://www.nanotech-now.com/news.cgi?story_id=56582

Continue Reading
AR/VR23 hours ago

‘Farpoint’ Studio Impulse Gear Announces a New VR Game Coming This Year

Esports2 days ago

PowerOfEvil on TSM’s Spring Split playoff preparation: ‘A lot of things are going to change in the next couple of days’

Aerospace2 days ago

Astra’s 100-year plan: Q&A with CEO Chris Kemp

Esports2 days ago

How to download Pokemon Unite APK, iOS, and Switch

Aerospace2 days ago

Partners produce rotor blade 3D-printed tool on Ingersoll 3D printer

Crowdfunding4 days ago

Verifi Reveals that Nearly $31 Billion Is Lost Yearly to Transaction Disputes, which May Be Reduced via “Proactive Management”

Crowdfunding4 days ago

Fintech Unicorn Brex Explains how Digital Commerce Startups can Scale Operations by Selling Wholesale

Cyber Security3 days ago

How you can get someone’s Snapchat password?

Aviation2 days ago

Uganda Airlines To Fly The Rare Airbus A330-800 To London Heathrow

Payments2 days ago

4-parter on Coinbase “IPO” – Part 1 = 5 Reasons Why It Matters

Gaming18 hours ago

Betfred Sports, Represented by SCCG Management, Signs Multi-year Marketing Agreement with the Colorado Rockies

Automotive3 days ago

Rivian shares details on the R1T pickup’s clever battery heating strategies

HRTech2 days ago

Only 57% Indian employees feel GTL insurance cover by employer is sufficient

Crowdfunding4 days ago

Kraken Bank CEO David Kinitsky Provides Glimpse into How He’s Planning to Set Up Operations, As Company Might Acquire More Funding

Blockchain2 days ago

Logan Paul Makes New NFT Pokemon Card Unboxing Highlights, Sells Out

Cyber Security2 days ago

Critical Vulnerability Discovered in a Firewall Appliance Made by Genua

Covid194 days ago

World Beer Index 2021: What’s the Price of a Beer in Your Country?

Cleantech1 day ago

Honda, Yamaha, KTM, & Vespa Agree To Universal Electric Motorcycle Battery Standard

Amb Crypto5 days ago

Grayscale eyes alts such as Cardano, Aave, Chainlink for new investment products

AR/VR1 day ago

Microsoft Announces Mesh, a Foundation for Building Multi-user XR Applications

Trending