Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



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

Researchers develop artificial building blocks of life March 8th, 2024

How surface roughness influences the adhesion of soft materials: Research team discovers universal mechanism that leads to adhesion hysteresis in soft materials March 8th, 2024

Two-dimensional bimetallic selenium-containing metal-organic frameworks and their calcinated derivatives as electrocatalysts for overall water splitting March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

Wireless/telecommunications/RF/Antennas/Microwaves

HKUST researchers develop new integration technique for efficient coupling of III-V and silicon February 16th, 2024

Optical-fiber based single-photon light source at room temperature for next-generation quantum processing: Ytterbium-doped optical fibers are expected to pave the way for cost-effective quantum technologies November 3rd, 2023

Chip-based dispersion compensation for faster fibre internet: SUTD scientists developed a novel CMOS-compatible, slow-light-based transmission grating device for the dispersion compensation of high-speed data, significantly lowering data transmission errors and paving the way for June 30th, 2023

Researchers demonstrate co-propagation of quantum and classical signals: Study shows that quantum encryption can be implemented in existing fiber networks January 20th, 2023

Possible Futures

Two-dimensional bimetallic selenium-containing metal-organic frameworks and their calcinated derivatives as electrocatalysts for overall water splitting March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

The Access to Advanced Health Institute receives up to $12.7 million to develop novel nanoalum adjuvant formulation for better protection against tuberculosis and pandemic influenza March 8th, 2024

Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024

Chip Technology

New chip opens door to AI computing at light speed February 16th, 2024

HKUST researchers develop new integration technique for efficient coupling of III-V and silicon February 16th, 2024

Electrons screen against conductivity-killer in organic semiconductors: The discovery is the first step towards creating effective organic semiconductors, which use significantly less water and energy, and produce far less waste than their inorganic counterparts February 16th, 2024

NRL discovers two-dimensional waveguides February 16th, 2024

Memory Technology

Interdisciplinary: Rice team tackles the future of semiconductors Multiferroics could be the key to ultralow-energy computing October 6th, 2023

Researchers discover materials exhibiting huge magnetoresistance June 9th, 2023

Rensselaer researcher uses artificial intelligence to discover new materials for advanced computing Trevor Rhone uses AI to identify two-dimensional van der Waals magnets May 12th, 2023

TUS researchers propose a simple, inexpensive approach to fabricating carbon nanotube wiring on plastic films: The proposed method produces wiring suitable for developing all-carbon devices, including flexible sensors and energy conversion and storage devices March 3rd, 2023

Nanomedicine

High-tech 'paint' could spare patients repeated surgeries March 8th, 2024

Researchers develop artificial building blocks of life March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

The Access to Advanced Health Institute receives up to $12.7 million to develop novel nanoalum adjuvant formulation for better protection against tuberculosis and pandemic influenza March 8th, 2024

Optical computing/Photonic computing

Optically trapped quantum droplets of light can bind together to form macroscopic complexes March 8th, 2024

New chip opens door to AI computing at light speed February 16th, 2024

HKUST researchers develop new integration technique for efficient coupling of III-V and silicon February 16th, 2024

NRL discovers two-dimensional waveguides February 16th, 2024

Sensors

$900,000 awarded to optimize graphene energy harvesting devices: The WoodNext Foundation's commitment to U of A physicist Paul Thibado will be used to develop sensor systems compatible with six different power sources January 12th, 2024

A color-based sensor to emulate skin's sensitivity: In a step toward more autonomous soft robots and wearable technologies, EPFL researchers have created a device that uses color to simultaneously sense multiple mechanical and temperature stimuli December 8th, 2023

New tools will help study quantum chemistry aboard the International Space Station: Rochester Professor Nicholas Bigelow helped develop experiments conducted at NASA’s Cold Atom Lab to probe the fundamental nature of the world around us November 17th, 2023

TU Delft researchers discover new ultra strong material for microchip sensors: A material that doesn't just rival the strength of diamonds and graphene, but boasts a yield strength 10 times greater than Kevlar, renowned for its use in bulletproof vests November 3rd, 2023

Discoveries

What heat can tell us about battery chemistry: using the Peltier effect to study lithium-ion cells March 8th, 2024

Researchers’ approach may protect quantum computers from attacks March 8th, 2024

High-tech 'paint' could spare patients repeated surgeries March 8th, 2024

Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024

Announcements

What heat can tell us about battery chemistry: using the Peltier effect to study lithium-ion cells March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

The Access to Advanced Health Institute receives up to $12.7 million to develop novel nanoalum adjuvant formulation for better protection against tuberculosis and pandemic influenza March 8th, 2024

Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024

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

Researchers develop artificial building blocks of life March 8th, 2024

How surface roughness influences the adhesion of soft materials: Research team discovers universal mechanism that leads to adhesion hysteresis in soft materials March 8th, 2024

Curcumin nanoemulsion is tested for treatment of intestinal inflammation: A formulation developed by Brazilian researchers proved effective in tests involving mice March 8th, 2024

Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024

Photonics/Optics/Lasers

Nanoscale CL thermometry with lanthanide-doped heavy-metal oxide in TEM March 8th, 2024

Optically trapped quantum droplets of light can bind together to form macroscopic complexes March 8th, 2024

HKUST researchers develop new integration technique for efficient coupling of III-V and silicon February 16th, 2024

A battery’s hopping ions remember where they’ve been: Seen in atomic detail, the seemingly smooth flow of ions through a battery’s electrolyte is surprisingly complicated February 16th, 2024

Research partnerships

Researchers’ approach may protect quantum computers from attacks March 8th, 2024

How surface roughness influences the adhesion of soft materials: Research team discovers universal mechanism that leads to adhesion hysteresis in soft materials March 8th, 2024

'Sudden death' of quantum fluctuations defies current theories of superconductivity: Study challenges the conventional wisdom of superconducting quantum transitions January 12th, 2024

Development of zinc oxide nanopagoda array photoelectrode: photoelectrochemical water-splitting hydrogen production January 12th, 2024

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