Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Giant enhancement of electromagnetic waves revealed within small dielectric particles: Scientists have done for the first time direct measurements of giant electromagnetic fields

Intensity of the magnetic field at the scattering of an electromagnetic wave. The incident wave propagates from left to right as it is indicated by the blue arrow. The color bar has different scales for the field outside the particle and within it (shown on a larger scale on the insert).
CREDIT
Michael Tribelsky
Intensity of the magnetic field at the scattering of an electromagnetic wave. The incident wave propagates from left to right as it is indicated by the blue arrow. The color bar has different scales for the field outside the particle and within it (shown on a larger scale on the insert). CREDIT Michael Tribelsky

Abstract:
Scientists from the Lomonosov Moscow State University together with their Russian and foreign colleagues have done for the first time direct measurements of giant electromagnetic fields, emerging in dielectric particles with the high refractive index at the scattering of electromagnetic waves. The researchers have presented their project results in the Scientific Reports.

Giant enhancement of electromagnetic waves revealed within small dielectric particles: Scientists have done for the first time direct measurements of giant electromagnetic fields

Moscow, Russia | Posted on July 8th, 2017

The problem of miniaturization of basic elements in electronics requires new approaches. In this connection, it has become very important to be able to create intensive electromagnetic fields concentrated in the smallest possible volume. Scientists from the Lomonosov Moscow State University in collaboration with an international team for the first time conducted direct measurements of a giant resonant field excited inside a subwavelength dielectric particle at the scattering of a plane electromagnetic wave and provided the complete quantitatively theoretical explanation of the observed effect.

Professor Michael Tribelsky, Doctor of Physics and Mathematics and the leading article author, says: "In theory this effect has been known: in this case the scattering particle acts as a funnel, gathering incident radiation from a large area and concentrating it in a small volume within the particle. However, one faces many difficulties on the way of its practical realization. Metallic nanoparticles were the first candidates for such "field concentrators." Unfortunately, they have deceived the expectations. The point is that metals have high dissipative losses in the most interesting for applications area of visible light frequencies of the incident waves. The dissipation leads to significant energy losses, wasted for fruitless (and often harmful) heating of the nanoparticle, and diminishes the resonant enhancement of the electromagnetic field. In such a case, it would be natural to turn to dielectric particles. Unfortunately, it is not so simple to deal with them too."

If a particle does not have a high value of its refractive index, the resonant effects are weak. Regarding the high-index particles, whose size is smaller than the wavelength of the incident radiation, the common belief was that the electromagnetic field hardly penetrated in such a particle. However, it has turned out to be that at some frequencies of the incident radiation the case is just the opposite. Namely, the field not only penetrates into the particle, but its giant concentration may be observed. In a sense, the effect is analogous to a gradual swinging of a swing due to weak but made in a proper moment of time pushes.

"Our main result is that, to the best of our knowledge, we are the first who has obtained the direct experimental evidence of the effect and measured the profiles of the excited fields," -- Michael Tribelsky explains.

The difficulties of the corresponding measurements at optical frequencies are related to the fact that one has to measure fields within a nanoparticle, and the spatial resolution of the measurements should be of the order of nanometers! We have overcome the difficulties, modeling the scattering of light by a nanoparticle by means of the identical scattering of radio waves by a centimeter-size particle. To be able to move a probe inside the particle, liquid dielectric (usual distilled water held at a certain fixed temperature) poured into a transparent for the incident radio wave container has been employed.

The research area, to which the project refers to, lies on the very frontier of modern studies on subwavelength optics (namely, optics, dealing with objects whose scales are smaller than the wavelength of the incident radiation). Interest in these phenomena is caused by their extensive applications ranging from medicine (diagnosis and treatment of diseases, including oncological ones; targeted drug delivery and others), biology (various sensors and markers), telecommunications (nanoantennas) to systems for information recording and storage and other spheres. This phenomenon could also be used for the creation of revolutionary new optical computers where information is transferred not by electric pulses but by light packages.

The scientist concludes: "In a broad perspective our project may initiate the creation of a new landscape for design and fabrication of super-miniature nanodevices and metamaterials -- namely, materials, which are artificially formed and structured in a special way to possess unusual electromagnetic properties."

###

The project has been done in cooperation with the scientists from the Faculty of Computational Mathematics and Cybernetics of the Lomonosov Moscow State University, National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), ITMO University and Australian National University.

####

For more information, please click here

Contacts:
Yana Khlyustova

Copyright © Lomonosov Moscow 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

RELATED JOURNAL ARTICLE:

Related News Press

News and information

Photonic chip guides single photons, even when there are bends in the road February 16th, 2018

Arrowhead Receives Regulatory Clearance to Begin Phase 1/2 Study of ARO-HBV for Treatment of Hepatitis B February 15th, 2018

Arrowhead Pharmaceuticals Receives Orphan Drug Designation for ARO-AAT February 15th, 2018

European & Korean Project To Demo World’s First 5G Platform During Winter Games February 15th, 2018

'Living bandages': NUST MISIS scientists develop biocompatible anti-burn nanofibers February 15th, 2018

Wireless/telecommunications/RF/Antennas/Microwaves

European & Korean Project To Demo World’s First 5G Platform During Winter Games February 15th, 2018

Vanadium dioxyde: A revolutionary material for tomorrow's electronics: Phase-chance switch can now be performed at higher temperatures February 5th, 2018

Possible Futures

Photonic chip guides single photons, even when there are bends in the road February 16th, 2018

'Living bandages': NUST MISIS scientists develop biocompatible anti-burn nanofibers February 15th, 2018

Rutgers-Led Innovation Could Spur Faster, Cheaper, Nano-Based Manufacturing: Scalable and cost-effective manufacturing of thin film devices February 14th, 2018

Understanding brain functions using upconversion nanoparticles: Researchers can now send light deep into the brain to study neural activities February 14th, 2018

Chip Technology

Photonic chip guides single photons, even when there are bends in the road February 16th, 2018

Graphene on toast, anyone? Rice University scientists create patterned graphene onto food, paper, cloth, cardboard February 13th, 2018

Liquid crystal molecules form nano rings: Quantized self-assembly enables design of materials with novel properties February 7th, 2018

Nanometrics Selected for Fab-Wide Process Control Metrology by Domestic China 3D-NAND Manufacturer: Latest Fab Win Includes Comprehensive Suite for Substrate, Thin Film and Critical Dimension Metrology February 7th, 2018

Memory Technology

New method enables high-resolution measurements of magnetism February 7th, 2018

Quantum cocktail provides insights on memory control: Experiments based on atoms in a shaken artificial crystal offer insight that might help in the development of future data-storage devices January 26th, 2018

Thanks for the memory: NIST takes a deep look at memristors January 20th, 2018

Ultra-thin memory storage device paves way for more powerful computing January 17th, 2018

Nanomedicine

Arrowhead Receives Regulatory Clearance to Begin Phase 1/2 Study of ARO-HBV for Treatment of Hepatitis B February 15th, 2018

Arrowhead Pharmaceuticals Receives Orphan Drug Designation for ARO-AAT February 15th, 2018

'Living bandages': NUST MISIS scientists develop biocompatible anti-burn nanofibers February 15th, 2018

Understanding brain functions using upconversion nanoparticles: Researchers can now send light deep into the brain to study neural activities February 14th, 2018

Optical computing/Photonic computing

Photonic chip guides single photons, even when there are bends in the road February 16th, 2018

Researchers from TU Delft combine spintronics and nanophotonics in 2-D material January 25th, 2018

Researchers use sound waves to advance optical communication January 22nd, 2018

Leti to Demo New Curving Technology at Photonics West that Improves Performance of Optical Components January 18th, 2018

Sensors

Graphene on toast, anyone? Rice University scientists create patterned graphene onto food, paper, cloth, cardboard February 13th, 2018

Leti Chief Scientist Barbara De Salvo Will Help Kick Off ISSCC 2018 with Opening-Day Keynote: In Addition, Leti Scientists Will Present and Demo New Technology for Piezoelectric Energy Harvesting February 8th, 2018

Engineers develop flexible, water-repellent graphene circuits for washable electronics January 24th, 2018

Leti to Demo New Curving Technology at Photonics West that Improves Performance of Optical Components January 18th, 2018

Discoveries

Photonic chip guides single photons, even when there are bends in the road February 16th, 2018

'Living bandages': NUST MISIS scientists develop biocompatible anti-burn nanofibers February 15th, 2018

Rutgers-Led Innovation Could Spur Faster, Cheaper, Nano-Based Manufacturing: Scalable and cost-effective manufacturing of thin film devices February 14th, 2018

Understanding brain functions using upconversion nanoparticles: Researchers can now send light deep into the brain to study neural activities February 14th, 2018

Announcements

Photonic chip guides single photons, even when there are bends in the road February 16th, 2018

Arrowhead Receives Regulatory Clearance to Begin Phase 1/2 Study of ARO-HBV for Treatment of Hepatitis B February 15th, 2018

Arrowhead Pharmaceuticals Receives Orphan Drug Designation for ARO-AAT February 15th, 2018

European & Korean Project To Demo World’s First 5G Platform During Winter Games February 15th, 2018

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

Photonic chip guides single photons, even when there are bends in the road February 16th, 2018

'Living bandages': NUST MISIS scientists develop biocompatible anti-burn nanofibers February 15th, 2018

Rutgers-Led Innovation Could Spur Faster, Cheaper, Nano-Based Manufacturing: Scalable and cost-effective manufacturing of thin film devices February 14th, 2018

Understanding brain functions using upconversion nanoparticles: Researchers can now send light deep into the brain to study neural activities February 14th, 2018

Photonics/Optics/Lasers

Photonic chip guides single photons, even when there are bends in the road February 16th, 2018

Rutgers-Led Innovation Could Spur Faster, Cheaper, Nano-Based Manufacturing: Scalable and cost-effective manufacturing of thin film devices February 14th, 2018

Understanding brain functions using upconversion nanoparticles: Researchers can now send light deep into the brain to study neural activities February 14th, 2018

Graphene on toast, anyone? Rice University scientists create patterned graphene onto food, paper, cloth, cardboard February 13th, 2018

Research partnerships

Rutgers-Led Innovation Could Spur Faster, Cheaper, Nano-Based Manufacturing: Scalable and cost-effective manufacturing of thin film devices February 14th, 2018

Understanding brain functions using upconversion nanoparticles: Researchers can now send light deep into the brain to study neural activities February 14th, 2018

Vanadium dioxyde: A revolutionary material for tomorrow's electronics: Phase-chance switch can now be performed at higher temperatures February 5th, 2018

Nanowire LED Innovator Aledia Announces €30 ($36M) Million Series-C Financing: Intel Capital Joins Existing Investors to Commercialize Certain Nanowire-LED Technologies for Mobile Displays January 29th, 2018

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



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project