Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Two-dimensional hybrid metal halide device allows control of terahertz emissions

Abstract:
“Coherent control of asymmetric spintronic terahertz emission from two-dimensional hybrid metal halides”

DOI: 10.1038/s41467-021-26011-6

Authors: Kankan Cong, Qi Zhang, Haidan Wen, Richard Schaller, Argonne National Laboratory; Eric Vetter, Alexander F. Kemper, Dali Sun, North Carolina State University; Liang Yan, Wei You, University of North Carolina Chapel Hill; Yi Li, Yuzan Xiong, Hongwei Qu, Wei Zhang; Oakland University; Axel Hoffmann, University of Illinois at Urbana Champaign; Yongxin Yao, Jigang Wang, Iowa State University

Published: Sept. 30 in Nature Communications

Abstract:
Next-generation terahertz (THz) sources demand lightweight, low-cost, defect-tolerant, and robust components with synergistic, tunable capabilities. However, a paucity of materials systems simultaneously possessing these desirable attributes and functionalities has made device realization difficult. Here we report the observation of asymmetric spintronic-THz radiation in Two-Dimensional Hybrid Metal Halides (2D-HMH) interfaced with a ferromagnetic metal, produced by ultrafast spin current under femtosecond laser excitation. The generated THz radiation exhibits an asymmetric intensity toward forward and backward emission direction whose directionality can be mutually controlled by the direction of applied magnetic field and linear polarization of the laser pulse. Our work demonstrates the capability for the coherent control of THz emission from 2D-HMHs, enabling their promising applications on the ultrafast timescale as solution-processed material candidates for future THz emitters.

JOURNAL
Nature Communications

DOI
10.1038/s41467-021-26011-6

METHOD OF RESEARCH
Experimental study

SUBJECT OF RESEARCH
Not applicable

ARTICLE TITLE
“Coherent control of asymmetric spintronic terahertz emission from two-dimensional hybrid metal halides”

ARTICLE PUBLICATION DATE
30-Sep-2021

COI STATEMENT
The authors declare no competing interests.

Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.

PrintEmail App
Media Contact

Tracey Peake
North Carolina State University

Office: 919-515-6142
More on this News Release
Two-dimensional hybrid metal halide device allows control of terahertz emissions
NORTH CAROLINA STATE UNIVERSITY

JOURNAL
Nature Communications
FUNDER
DOI
10.1038/s41467-021-26011-6
KEYWORDS
METALSSPINTRONICSOPTICSMATERIALS TESTING

Two-dimensional hybrid metal halide device allows control of terahertz emissions

Durham, NC | Posted on October 1st, 2021

Researchers have utilized two-dimensional hybrid metal halides in a device that allows directional control of terahertz radiation generated by a spintronic scheme. The device has better signal efficiency than conventional terahertz generators, and is thinner, lighter and less expensive to produce.

Terahertz (THz) refers to the part of the electromagnetic spectrum (i.e., frequencies between 100 GHz and 10 THz) between microwave and optical, and THz technologies have shown promise for applications ranging from faster computing and communications to sensitive detection equipment. However, creating reliable THz devices has been challenging due to their size, cost and energy conversion inefficiency.

“Ideally, THz devices of the future should be lightweight, low-cost and robust, but that has been difficult to achieve with current materials,” says Dali Sun, assistant professor of physics at North Carolina State University and co-corresponding author of the work. “In this work, we found that a 2D hybrid metal halide commonly used in solar cells and diodes, in conjunction with spintronics, may meet several of these requirements.”

The 2D hybrid metal halide in question is a popular and commercially available synthetic hybrid semiconductor: butyl ammonium lead iodine. Spintronics refers to controlling the spin of an electron, rather than just using its charge, in order to create energy.

Sun and colleagues from Argonne National Laboratories, the University of North Carolina at Chapel Hill and Oakland University created a device that layered the 2D hybrid metal halides with a ferromagnetic metal, then excited it with a laser, creating an ultrafast spin current that in turn generated THz radiation.

The team found that not only did the 2D hybrid metal halide device outperform larger, heavier and more expensive to produce THz emitters currently in use, they also found that the 2D hybrid metal halide’s properties allowed them to control the direction of the THz transmission.

“Traditional terahertz transmitters were based upon ultrafast photocurrent,” Sun says. “But spintronic-generated emissions produce a wider bandwidth of THz frequency, and the direction of the THz emission can be controlled by modifying the speed of the laser pulse and the direction of the magnetic field, which in turn affects the interaction of magnons, photons, and spins and allows us directional control.”

Sun believes that this work could be a first step in exploring 2D hybrid metal halide materials generally as potentially useful in other spintronic applications.

“The 2D hybrid metal halide-based device used here is smaller and more economical to produce, is robust and works well at higher temperatures,” Sun says. “This suggests that 2D hybrid metal halide materials may prove superior to the current conventional semiconductor materials for THz applications, which require sophisticated deposition approaches that are more susceptible to defects.

“We hope that our research will launch a promising testbed for designing a wide variety of low-dimensional hybrid metal halide materials for future solution-based spintronic and spin-optoelectronic applications.”

The work appears in Nature Communications and is supported by the National Science Foundation under grant ECCS-1933297. Postdoctoral researcher Kankan Cong of Argonne National Laboratory, former NC State graduate student Eric Vetter of North Carolina State University, and postdoctoral researcher Liang Yan of UNC-CH are co-first authors. Haiden Wen, physicist at Argonne National Laboratory, Wei You, professor of chemistry at UNC-CH and Wei Zhang, associate professor at Oakland University, are co-corresponding authors of the research.

####

For more information, please click here

Contacts:
Tracey Peake
North Carolina State University

Office: 919-515-6142

Copyright © North Carolina State University

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

ARTICLE TITLE

Related News Press

News and information

Scientists develop promising vaccine method against recurrent UTI November 19th, 2021

How ultracold, superdense atoms become invisible: A new study confirms that as atoms are chilled and squeezed to extremes, their ability to scatter light is suppressed November 19th, 2021

New microscopy method offers 3D tracking of 100 single molecules at once November 19th, 2021

Two is better than one: Single-atom dimer electrocatalyst for green hydrogen production: Nickel-cobalt metal dimer on nitrogen-doped carbon can catalyze electrolysis under both acidic and basic conditions November 19th, 2021

Visualizing temperature transport: An unexpected technique for nanoscale characterization November 19th, 2021

2 Dimensional Materials

Developing high-performance MXene electrodes for next-generation powerful battery November 19th, 2021

Possible Futures

Developing high-performance MXene electrodes for next-generation powerful battery November 19th, 2021

Cancer cells use ‘tiny tentacles’ to suppress the immune system: With the power of nanotechnology, investigators have discovered that cancer cells strengthen by forming nanotubes that they use to suck mitochondria out of immune cells November 19th, 2021

Efficient photon upconversion at an organic semiconductor interface November 19th, 2021

Quantum brain sensors could be crucial in spotting dementia after University of Sussex scientists find they can track brain waves: Sensors introduce important new method to spot bio-marker for brain diseases • Accurate timings of when brain signals fire demonstrated for first tim November 19th, 2021

Spintronics

Quantifying spin for future spintronics: Spin-momentum locking induced anisotropic magnetoresistance in monolayer WTe2 November 5th, 2021

A new dimension in magnetism and superconductivity launched November 5th, 2021

Ultrafast magnetism: heating magnets, freezing time: This study on Gadolinium is completing a series of experiments on Nickel, Iron-Nickel Alloys: The results are useful for developing ultrafast data storage devices October 15th, 2021

Magnetism drives metals to insulators in new experiment: Study provides new tools to probe novel spintronic devices June 4th, 2021

Quantum Computing

How ultracold, superdense atoms become invisible: A new study confirms that as atoms are chilled and squeezed to extremes, their ability to scatter light is suppressed November 19th, 2021

Quantifying spin for future spintronics: Spin-momentum locking induced anisotropic magnetoresistance in monolayer WTe2 November 5th, 2021

Photon-pair source with pump rejection filter fabricated on single CMOS chip: New integrated source provides critical component for chip-based quantum photonic systems October 15th, 2021

Fujitsu and Osaka University deepen collaborative research and development for fault-tolerant quantum computers October 1st, 2021

Discoveries

Developing high-performance MXene electrodes for next-generation powerful battery November 19th, 2021

Efficient photon upconversion at an organic semiconductor interface November 19th, 2021

Quantum brain sensors could be crucial in spotting dementia after University of Sussex scientists find they can track brain waves: Sensors introduce important new method to spot bio-marker for brain diseases • Accurate timings of when brain signals fire demonstrated for first tim November 19th, 2021

New microscopy method offers 3D tracking of 100 single molecules at once November 19th, 2021

Announcements

Efficient photon upconversion at an organic semiconductor interface November 19th, 2021

Quantum brain sensors could be crucial in spotting dementia after University of Sussex scientists find they can track brain waves: Sensors introduce important new method to spot bio-marker for brain diseases • Accurate timings of when brain signals fire demonstrated for first tim November 19th, 2021

New microscopy method offers 3D tracking of 100 single molecules at once November 19th, 2021

Two is better than one: Single-atom dimer electrocatalyst for green hydrogen production: Nickel-cobalt metal dimer on nitrogen-doped carbon can catalyze electrolysis under both acidic and basic conditions November 19th, 2021

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Scientists develop promising vaccine method against recurrent UTI November 19th, 2021

How ultracold, superdense atoms become invisible: A new study confirms that as atoms are chilled and squeezed to extremes, their ability to scatter light is suppressed November 19th, 2021

Energizer atoms: JILA researchers find new way to keep atoms excited November 19th, 2021

Developing high-performance MXene electrodes for next-generation powerful battery November 19th, 2021

Quantum nanoscience

Engineering various sources of loss provides new features for perfect light absorption: "Loss is ubiquitous in nature, and by better understanding it, we make it more useful" September 10th, 2021

Tapping into magnets to clamp down on noise in quantum information September 9th, 2021

Researchers use gold film to enhance quantum sensing with qubits in a 2D material September 3rd, 2021

Best of both worlds—Combining classical and quantum systems to meet supercomputing demands: Scientists detect strongly entangled pair of protons on a nanocrystalline silicon surface, potentially enabling new levels of high-speed computing August 13th, 2021

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project