Sign In

Delhi News Daily

  • Home
  • Fashion
  • Business
  • World News
  • Technology
  • Sports
  • Politics
  • Lifestyle
  • Entertainment
Reading: Metamaterial Breaks Thermal Symmetry, Enables One-Way Heat Emission – Delhi News Daily
Share

Delhi News Daily

Font ResizerAa
Search
Have an existing account? Sign In
Follow US
© 2022 Foxiz News Network. Ruby Design Company. All Rights Reserved.
Delhi News Daily > Blog > Technology > Metamaterial Breaks Thermal Symmetry, Enables One-Way Heat Emission – Delhi News Daily
Technology

Metamaterial Breaks Thermal Symmetry, Enables One-Way Heat Emission – Delhi News Daily

delhinewsdaily
Last updated: July 4, 2025 9:44 pm
delhinewsdaily
Share
Metamaterial Breaks Thermal Symmetry, Enables One-Way Heat Emission
SHARE


Researchers have found that a metamaterial, a stack of InGaAs semiconductor layers, can emit significantly more mid-infrared radiation than it absorbs. When this sample was heated (~540 K) in a 5-tesla magnetic field, it exhibited a record nonreciprocity of 0.43 (about twice the previous best). In other words, it strongly violates Kirchhoff’s law and forces heat to flow one way. This demonstration of strong nonreciprocal thermal emission could enable devices like one-way thermal diodes and improve technologies like solar thermophotovoltaics and heat management.

According to the published study, the new device is made from five ultra-thin layers of a semiconductor called indium gallium arsenide, each 440 nanometers thick. The layers were gradually doped with more electrons as they went deeper and were placed on a silicon base. The researchers then heated the material to about 512°F and applied a strong magnetic field of 5 teslas. Under these conditions, the material emitted 43% more infrared light in one direction than it absorbed—a strong sign of nonreciprocity. This effect was about twice as strong as in earlier studies and worked across many angles and infrared wavelengths (13 to 23 microns).

By providing a one-way flow of heat, the metamaterial would serve as a thermal transistor or diode. It could enhance solar thermophotovoltaics by sending waste heat to energy-harvesting cells and aid in controlling heat in sensing and electronics. It has potential implications for energy harvesting, thermal control, and new heat devices

Challenging Thermal Symmetry

Kirchhoff’s law of thermal radiation (1860) states that at thermal equilibrium, a material’s emissivity equals its absorptivity at each wavelength and angle. Practically, this reciprocity means a surface that strongly emits infrared will absorb it equally well.

Breaking this symmetry requires violating time-reversal symmetry, such as by applying a magnetic field to a magneto-optical material. For example, a 2023 study showed that a single layer of indium arsenide (InAs) in a ~1 T magnetic field could produce nonreciprocal thermal emission. However, that effect was extremely weak and worked only at specific wavelengths and angles. Till now, magneto-optical designs have achieved only tiny emission–absorption imbalances under very restrictive conditions. The new achievement demonstrates that man-made materials can produce one-way thermal emitters.

 



Source link

Share This Article
Twitter Email Copy Link Print
What do you think?
Love0
Sad0
Happy0
Sleepy0
Angry0
Dead0
Wink0
Previous Article Trump’s $450M ‘Alligator Alcatraz’ FLOODS On Day One | Swamp Prison Camp Sparks CHAOS & Mockery – Delhi News Daily
Next Article News18 ‘We’re Fighting Terrorism’: Aaditya Thackeray Slams Centre Over Clearance To Pak’s Hockey Team – Delhi News Daily
Leave a comment

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Recent Posts

  • Ship attacked by Yemen’s Houthi rebels sinks in Red Sea, six of 25 aboard rescued – Delhi News Daily
  • Kanhaiya Kumar, Pappu Yadav Denied Spot In Rahul Gandhi’s Vehicle? Sanjay Nirupam Jabs Congress – Delhi News Daily
  • Progress 92 Spacecraft Docks at ISS with Vital Supplies for Expedition 73 – Delhi News Daily
  • Arbaaz Khan and wife Sshura twin in black at film premiere; mommy-to-be hides her baby bump in style: Watch | Hindi Movie News – Times of India – Delhi News Daily
  • ‘They aren’t criminals, they are mum and dad’: Son of UK couple emotional over parents arrest in Iran; no direct talks in over 6 months – Times of India – Delhi News Daily

Recent Comments

No comments to show.

You Might Also Like

Supermassive Black Hole Burps Matter at Near-Light Speeds After Consuming Gas Too Fast
Technology

Supermassive Black Hole Burps Matter at Near-Light Speeds After Consuming Gas Too Fast – Delhi News Daily

A distant supermassive black hole has stunned astronomers by expelling matter at speeds nearing a third of light velocity after…

2 Min Read
WhatsApp Reportedly Working on Ability to Scan Documents on Android Smartphones
Technology

WhatsApp Will Soon Let You Scan Documents on Your Android Phone – Delhi News Daily

WhatsApp is working on a feature that will allow you to scan documents on your Android smartphone, according to a…

3 Min Read
First Copy Now Streaming on Amazon MX Player: Everything You Need to Know About Munawar Faruqui Starrer Drama Series
Technology

First Copy Now Streaming Online: Know More About Cast, Plot, and More – Delhi News Daily

First Copy is an Indian drama web series that has finally landed on your digital screens. Written and directed by…

3 Min Read
NxtQuantum Announced as India’s Home-Grown Mobile Operating System, to Debut on AI+ Pulse and Nova 5G
Technology

NxtQuantum Arrives as Made in India Mobile OS, to Debut on Its AI+ Phones – Delhi News Daily

NxtQuantum Shift Technologies, an Indian deep tech software company, announced its home-grown mobile operating system on Friday. Dubbed NxtQuantum OS,…

3 Min Read

Delhi News Daily

© Delhi News Daily Network.

Incognito Web Technologies

Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?