Webinar Programs

SELECT ID, title, date_available FROM seminar WHERE provider_id='396' AND date_available <= '20160501' AND invitationonly=0 AND (expiration_date > NOW() OR expiration_date < '2000-1-1')ORDER BY date_available DESC
Upcoming Live Webcasts
Collapse Losses in plasmonics: strategies to bypass, mitigate or - if nothing else works - embrace them

 

Unlike conventional optics, plasmonics enables unrivalled high concentration of optical energy well beyond the diffraction limit. However, a significant part of this energy is dissipated as heat. Plasmonic losses present a major hurdle in the development of plasmonic devices and circuits that can compete with other mature technologies. They have largely kept the use of plasmonics to a few niche areas where loss is not a key factor, such as surface enhanced Raman scattering and biochemical sensing. However, sensing applications could also significantly benefit from improvements in spectral selectivity of plasmonic sensors, which is hindered by the plasmonic modes broadening due to dissipative and scattering losses.

 

In this webinar presented by the OSA Nanophotonics Technical Group, Dr. Svetlana Boriskina from the Massachusetts Institute of Technology will describe three viable approaches to mitigate plasmonic losses, which go beyond the efforts to compensate losses with optical gain or to synthesize better plasmonic materials. The first approach is based on modifying the optical powerflow through plasmonic devices such that the optical energy circulates through the inter-particle gaps rather than through metal volume. This can be achieved – somewhat counter-intuitively – by engineering destructive interference of plasmonic near-fields to create points of topological darkness in plasmonic nanocircuits, which give rise to areas of circulating optical powerflow – optical vortices. Dr. Boriskina will show how recycling optical energy through optical vortices pinned to plasmonic nanostructures enables light trapping outside the metal volume, which reduces losses and yields ultra-narrow plasmonic resonances.

 

Another promising strategy to reduce and mitigate plasmonic losses is based on the development of hybrid photonic-plasmonic devices and networks by coupling plasmonic nanostructures to optical microresonators and waveguides. Dr. Boriskina will discuss how hybrid integration not only helps to reduce dissipative losses and to develop sensors with simultaneously high spectral and spatial resolution, but also makes possible to achieve non-contact radiative cooling of plasmonic devices. Finally, Dr. Boriskina will outline the emerging applications of plasmonics for thermal emission manipulation, solar vapor generation and heat-assisted magnetic recording, which offer a strategy to leverage Ohmic losses in metals to obtain devices with new enhanced functionalities.

 

What You Will Learn/Seminar Objectives:

  • Approaches to reduce plasmonic losses, such as modification of optical powerflow on the nanoscale, hybrid photonic-plasmonic integration, and radiative cooling.
  • Overview of emerging applications of thermal plasmonics.

 

Who Should Attend:

  • Graduate students, postdocs and researchers interested in plasmonic devices with reduced losses and new functionalities.
  • Anyone with interest in thermal plasmonic devices, such as HAMR, solar vapor generation, and plasmonic thermal emission.
  • Nanophotonic scientists and engineers working on the development of plasmonic devices and nanocircuits.

 

Level:

  • The level of the webinar is intermediate. The fundamental concepts will be explained. However, a basic knowledge of plasmonics, nanophotonics, and materials science is assumed.

 

Formats Available: Live Webcast
Original Seminar Date: May 09, 2016
MORE INFOMORE INFO Losses in plasmonics: strategies to bypass, mitigate or - if nothing else works - embrace them
Collapse Applied Laser Spark Spectroscopy: The Evolution of LIBS into Real-World Applications

 

Join the OSA Applied Spectroscopy Technical Group and Dr. Andrzej Miziolek for this webinar featuring a discussion the evolution of Laser-Induced Breakdown Spectroscopy into real-world applications. Laser-Induced Breakdown Spectroscopy (LIBS) is a form of spark spectrochemical analysis which has evolved significantly over the last few decades with rapid growth in the analysis of real-world samples.  The convergence of developments in the last decade in both hardware (e.g. broadband spectrometers, smaller and more powerful lasers) as well as data analysis techniques (e.g. chemometrics) has propelled LIBS into new and uncharted territory with regards to its impact on humankind. 

 

For example, the LIBS containing ChemCam system on the Mars Science Laboratory rover Curiosity is producing an immense amount of very valuable data on the composition of the soil and rocks on the surface of the planet and is clearly demonstrating the inherent attributes of the LIBS technique with regards to speed, ruggedness, compactness, and robustness.  Published examples from laboratories world-wide are accelerating in numbers covering topics such as analysis of:  human tissue (for surgery aid and for the detection of cancer), food products such as olive oils and spices (for quality, adulteration, and authenticity of source), plants (cigar and cannabis origin, presence of pesticides), toxic and wear metal analysis in engines and transmission, are among a large number of examples.   

 

The future of LIBS is indeed very bright, especially for its use in real-world applications outside of the laboratory, which is becoming a reality with the recent development of portable and field-worthy devices such as the handheld units currently being sold by at least 5 companies.  This webinar will present an overview on the current status and speculations about where the LIBS technology could be going in the next 5 to 10 years and beyond.

 

What You Will Learn/Seminar Objectives:

  • Attendees will learn about the fundamentals of Laser Induced Breakdown Spectroscopy (LIBS) from one of the key experts in the field. General principles along with instrumentation requirements will be considered.
  • Attendees will be presented with an array of applications of LIBS technique, which will help to appreciate the capabilities of this technology for research and applied work.

 

Who Should Attend:

  • Students wishing to learn about LIBS.
  • Scientists looking to gain better understanding of LIBS capabilities and potentially including this method into their arsenal of analytical spectroscopic techniques.
  • Anyone interested in learning about LIBS as one of the most powerful spectroscopic methods which is being actively studied in the modern field of Applied Spectroscopy.

 

Level:

  • Intermediate; accessible to non-specialists in the field.
Formats Available: Live Webcast
Original Seminar Date: May 17, 2016
MORE INFOMORE INFO Applied Laser Spark Spectroscopy: The Evolution of LIBS into Real-World Applications
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Molecular Spectroscopy with Optical Frequency Combs Feb 16, 2016
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Surface Slope Tolerances Nov 15, 2013
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Rugged Micro-Optic Packaging for Extreme Environments Jan 17, 2013
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Losses in plasmonics: strategies to bypass, mitigate or - if nothing else works - embrace them Dec 31, 1969
Applied Laser Spark Spectroscopy: The Evolution of LIBS into Real-World Applications Nov 30, -0001
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