Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Laser and sensor research to be advanced by new inquiries into plasmonic-photonic crystals

12.08.2019

A paper by Kazan Federal University appeared in Plasmonics

A group of researchers led by Professor Myakzyum Salakhov has been working on the problem of optical states in plasmonic-photonic crystals (PPCs). The group mostly consists of young scientists, some of whom started their participation in the project during their student years.


Schemes of PPC with equal effective refractive index and structure period. a 1D PPC and b 3D opal-like PPC

Credit: Kazan Federal University

First Category Engineer Artyom Koryukin comments that the research was dedicated to modelling light transmission throughout photonic crystals with a continuous gold layer on their surface. Photonic crystals don't pass a certain wavelength (color) of light.

This is called the photonic bandgap - the range of light wavelength where propagation through a crystal is difficult. PPCs, on the contrary, allow the passing of light of a certain wavelength in this photonic bandgap. The problem of three-dimensional opal-like PPCs (OLPPCs), however, is that they don't admit light of certain wavelengths.

In this work, conditions are defined for the passing of a beam of light with the wavelength of the photonic bandgap and certain polarization through an OLPPC. To achieve this goal, different versions of PPCs were modelled.

The main conditions to pass such a beam are both the continuity of the gold layer with thickness of about 40 nm and the use of light with polarization. Transmittance of light across a PPC is accompanied by excitations of the optical Tamm states. One- dimensional PPC has a light transmission pass bands inside the photonic bandgap in both polarizations.

Three-dimensional PPCs do not have light transmission pass bands inside the photonic bandgap because of a non-continuous gold layer (shaped like separate nano-caps or nano-crescents on the surface of a PPC). So the used OLPPCs have this unique feature - they have a light transmission pass band inside the photonic bandgap with certain polarization due to the excitation of the hybrid mode of the optical states.

OLPPCs with the hybrid mode of the optical states can be used in high-polarization-sensitive sensors. "We assume that the hybrid mode can be useful for improving the control of light in PPCs. New types of resonators based on OLPPCs can be used for the strong interaction of light and matter," adds Mr. Koryukin.

The group is planning to create a theoretical description of the model of such processes. Additionally, they want to find effective applications for OLPPCs, such as strong light-matter interactions with a single photon source.

###

NB: This paper was first made available online in November 2018 with a print versions following in August 2019.

Yury Nurmeev | European Geosciences Union
Further information:
https://kpfu.ru/eng/news-eng/opal-like-plasmonic-photonic-crystals.html
http://dx.doi.org/10.1007/s11468-018-0880-6

More articles from Physics and Astronomy:

nachricht Spintronics: Researchers show how to make non-magnetic materials magnetic
06.08.2020 | Martin-Luther-Universität Halle-Wittenberg

nachricht Manifestation of quantum distance in flat band materials
05.08.2020 | Institute for Basic Science

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: ScanCut project completed: laser cutting enables more intricate plug connector designs

Scientists at the Fraunhofer Institute for Laser Technology ILT have come up with a striking new addition to contact stamping technologies in the ERDF research project ScanCut. In collaboration with industry partners from North Rhine-Westphalia, the Aachen-based team of researchers developed a hybrid manufacturing process for the laser cutting of thin-walled metal strips. This new process makes it possible to fabricate even the tiniest details of contact parts in an eco-friendly, high-precision and efficient manner.

Plug connectors are tiny and, at first glance, unremarkable – yet modern vehicles would be unable to function without them. Several thousand plug connectors...

Im Focus: New Strategy Against Osteoporosis

An international research team has found a new approach that may be able to reduce bone loss in osteoporosis and maintain bone health.

Osteoporosis is the most common age-related bone disease which affects hundreds of millions of individuals worldwide. It is estimated that one in three women...

Im Focus: AI & single-cell genomics

New software predicts cell fate

Traditional single-cell sequencing methods help to reveal insights about cellular differences and functions - but they do this with static snapshots only...

Im Focus: TU Graz Researchers synthesize nanoparticles tailored for special applications

“Core-shell” clusters pave the way for new efficient nanomaterials that make catalysts, magnetic and laser sensors or measuring devices for detecting electromagnetic radiation more efficient.

Whether in innovative high-tech materials, more powerful computer chips, pharmaceuticals or in the field of renewable energies, nanoparticles – smallest...

Im Focus: Tailored light inspired by nature

An international research team with Prof. Cornelia Denz from the Institute of Applied Physics at the University of Münster develop for the first time light fields using caustics that do not change during propagation. With the new method, the physicists cleverly exploit light structures that can be seen in rainbows or when light is transmitted through drinking glasses.

Modern applications as high resolution microsopy or micro- or nanoscale material processing require customized laser beams that do not change during...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

“Conference on Laser Polishing – LaP 2020”: The final touches for surfaces

23.07.2020 | Event News

Conference radar for cybersecurity

21.07.2020 | Event News

Contact Tracing Apps against COVID-19: German National Academy Leopoldina hosts international virtual panel discussion

07.07.2020 | Event News

 
Latest News

Rare Earth Elements in Norwegian Fjords?

06.08.2020 | Earth Sciences

Anode material for safe batteries with a long cycle life

06.08.2020 | Power and Electrical Engineering

Turning carbon dioxide into liquid fuel

06.08.2020 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>