[Audio] NCN Nanophotonics: Tutorials
http://nanohub.org/resources/4750
Fri, 23 Jun 2017 15:51:28 +0000HUBzero - The open source platform for scientific and educational collaborationFrom among the many tutorial lectures available on the nanoHUB, we list a few that convey new approaches to optics, metamaterials, and photonics.nanoHUB.orgsupport@nanohub.orgnoeducation/outreach, nanophotonics, tutorial, metamaterialsen-gbCopyright 2017 nanoHUB.orgResourcesNanoscale Antenna Apertures
http://nanohub.org/resources/2642
This presentation will discuss light concentration and enhancement in nanometer-scale ridge aperture antennas. Resent research, including numerical simulations and near field optical measurements has demonstrated that nanoscale ridge antenna apertures can concentrate light into nanometer domain. More importantly, these ridge antenna apertures also provide enhanced optical transmission several orders of magnitude higher than regularly shaped nano-apertures. We will discuss fundamental theories of ridge antenna apertures, finite-difference time-domain (FDTD) calculations for optimizing the design of these antenna apertures, and near field scanning optical microscope (NSOM) measurements of the near field intensity distribution of the light transmitted through these apertures. It is shown that the nanoscale antenna apertures can produce a concentrated light spot beyond the diffraction limit with enhanced transmission. Potential applications of these nanoscale aperture antennas include nano-lithography and nano-imaging.http://nanohub.org/site/resources/2007/04/02646/2007.03.21-xu-nt501.mp3This presentation will discuss light concentration and enhancement in nanometer-scale ridge aperture antennas. Resent research, including numerical simulations and near field optical measurements has demonstrated that nanoscale ridge antenna apertures can concentrate light into nanometer domain. More importantly, these ridge antenna apertures also provide enhanced optical transmission several orders of magnitude higher than regularly shaped nano-apertures. We will discuss fundamental theories of ridge antenna apertures, finite-difference time-domain (FDTD) calculations for optimizing the design of these antenna apertures, and near field scanning optical microscope (NSOM) measurements of the near field intensity distribution of the light transmitted through these apertures. It is shown that the nanoscale antenna apertures can produce a concentrated light spot beyond the diffraction limit with enhanced transmission. Potential applications of these nanoscale aperture antennas include nano-lithography and nano-imaging.nonanophotonics, tutorial, processing, hosted/taped by NCN@Purdue, lithography, nanooptics, from PurdueXianfan XuXianfan XuOnline PresentationsTue, 24 Apr 2007 22:15:55 +0000http://nanohub.org/site/resources/2007/04/02646/2007.03.21-xu-nt501.mp3Nano Scale Optics with Nearfield Scanning Optical Microscopy (NSOM)
http://nanohub.org/resources/2003
NearfieldScanning Optical Microscopy (NSOM )is a relatively new technology that defeats the diffraction limit for optical measurements by utilizing the near field portion of electromagnetism to window down to ~ 10 nm spatial resolution. NSOM instrumentation has progressively developed over the past 15 years, to the point where several different basic techniques are available as commercial instruments The principles of NSOM are very much in play within the research community. NSOM has many different applications ranging from biological studies to nanofabrication. This tutorial provides a basic introduction to NSOM.http://nanohub.org/site/resources/2006/11/02007/2006.11.02-ece695s-l13.mp3NearfieldScanning Optical Microscopy (NSOM )is a relatively new technology that defeats the diffraction limit for optical measurements by utilizing the near field portion of electromagnetism to window down to ~ 10 nm spatial resolution. NSOM instrumentation has progressively developed over the past 15 years, to the point where several different basic techniques are available as commercial instruments The principles of NSOM are very much in play within the research community. NSOM has many different applications ranging from biological studies to nanofabrication. This tutorial provides a basic introduction to NSOM.nonanophotonics, course lecture, Nearfield Scanning Optical Microscopy, hosted/taped by NCN@Purdue, from PurdueReuben Bakker, Vladimir M. ShalaevReuben Bakker, Vladimir M. ShalaevOnline PresentationsFri, 17 Nov 2006 01:13:01 +0000http://nanohub.org/site/resources/2006/11/02007/2006.11.02-ece695s-l13.mp3Some Remarks to Electrodynamics of Materials with Negative Refraction
http://nanohub.org/resources/2792
The negative refraction coefficient n < 0 can be introduced for isotropic materials with anti-parallel directions of phase and group velocities. If some of material can be described by negative n it will have also negative values of both (electrical ε and magnetic μ) permeabilities. In materials with negative refraction coefficient, the realization of many physical laws is unusual. For example, in the case n < 0, the refracted beam in Snellius law is situated simmetrically with one for the case of positive n. Some other examples will be discussed among them is the very interesting flat lens, which can be used in so called “optical tweezers”. The discovery of negative refraction materials poses a very important question – to what extent are all the laws and formulas of electrodynamics, optics and related technical sciences valid, when n is negative? Can we always simply change the sign n → - n as, for example, in Snellius law? Generally speaking, the answer to this question is negative. Many laws and equations of electrodynamics and optics correspond to the case of non-magnetic materials with permeability μ = 1. This non-magnetic approach leads to many formulas that drastically change for the case μ ≠ 1, especially for μ < 0. For example, if one substitutes negative n into Fresnel equations, the results will be wrong. Special table, which outlines the situation, will be given in the talk. In the talk, some examples of negative refaction materials will be discussed and their properties and possible applications. The negative refraction phenomena can be observed not only in materials with negative value of n, ε and μ, but in many substances, which cannot be described by these values. So, this sort of refraction presents in anysotropic crystals. These materials are described by tensor, not scalar values of n, ε and μ. The other, very important example of negative-refraction materials are called photonic crystals. The main difference between photonic crystals and materials with negative n, ε and μ, is the relation between wavelength λ and lattice constant a in materials with negative refraction coefficient λ > a, but in photonic crystals a ≥ λ. So, materials with negative refraction coefficient can be described on the base of harmonic oscillation equation, but photonic crystals – on the base of Blokh, or Mattiew equations. The phenomenology of this two sort of materials is in many cases similar, but physics background is different. This talk will include discussion of the problem of estimation of pressure of light in LHM materials.http://nanohub.org/site/resources/2007/06/02840/2007.06.12-veselago.mp3The negative refraction coefficient n < 0 can be introduced for isotropic materials with anti-parallel directions of phase and group velocities. If some of material can be described by negative n it will have also negative values of both (electrical ε and magnetic μ) permeabilities. In materials with negative refraction coefficient, the realization of many physical laws is unusual. For example, in the case n < 0, the refracted beam in Snellius law is situated simmetrically with one for the case of positive n. Some other examples will be discussed among them is the very interesting flat lens, which can be used in so called “optical tweezers”. The discovery of negative refraction materials poses a very important question – to what extent are all the laws and formulas of electrodynamics, optics and related technical sciences valid, when n is negative? Can we always simply change the sign n → - n as, for example, in Snellius law? Generally speaking, the answer to this question is negative. Many laws and equations of electrodynamics and optics correspond to the case of non-magnetic materials with permeability μ = 1. This non-magnetic approach leads to many formulas that drastically change for the case μ ≠ 1, especially for μ < 0. For example, if one substitutes negative n into Fresnel equations, the results will be wrong. Special table, which outlines the situation, will be given in the talk. In the talk, some examples of negative refaction materials will be discussed and their properties and possible applications. The negative refraction phenomena can be observed not only in materials with negative value of n, ε and μ, but in many substances, which cannot be described by these values. So, this sort of refraction presents in anysotropic crystals. These materials are described by tensor, not scalar values of n, ε and μ. The other, very important example of negative-refraction materials are called photonic crystals. The main difference between photonic crystals and materials with negative n, ε and μ, is the relation between wavelength λ and lattice constant a in materials with negative refraction coefficient λ > a, but in photonic crystals a ≥ λ. So, materials with negative refraction coefficient can be described on the base of harmonic oscillation equation, but photonic crystals – on the base of Blokh, or Mattiew equations. The phenomenology of this two sort of materials is in many cases similar, but physics background is different. This talk will include discussion of the problem of estimation of pressure of light in LHM materials.nonanophotonics, research seminar, metamaterials, hosted/taped by NCN@Purdue, from outside NCNVictor G. VeselagoVictor G. VeselagoOnline PresentationsWed, 27 Jun 2007 00:43:01 +0000http://nanohub.org/site/resources/2007/06/02840/2007.06.12-veselago.mp3Victor Veselago Interview on Nanotechnology and Photonics
http://nanohub.org/resources/2796
Nanotechnology and photonics interview with Phillip Fiorini.http://nanohub.org/site/resources/2007/06/02838/2007.06.13-veselago-interview.mp3Nanotechnology and photonics interview with Phillip Fiorini.nonanophotonics, K-12, research seminar, metamaterials, hosted/taped by NCN@Purdue, nanooptics, from Purdue, from outside NCN, interview, materials scienceVictor G. Veselago, Phillip FioriniVictor G. Veselago, Phillip FioriniOnline PresentationsWed, 27 Jun 2007 00:02:08 +0000http://nanohub.org/site/resources/2007/06/02838/2007.06.13-veselago-interview.mp3Plasmonic Nanophotonics: Coupling Light to Nanostructure via Plasmons
http://nanohub.org/resources/194
The photon is the ultimate unit of information because it packages data in a signal of zero mass and has unmatched speed. The power of light is driving the photonicrevolution, and information technologies, which were formerly entirely electronic, are increasingly enlisting light to communicate and provide intelligent control. Plasmonic nanophotonics promises to create entirely new prospects for guiding light on the nanoscale, some of which may have revolutionary impact on present-day optical technologies.http://nanohub.org/site/resources/2006/07/01646/2005.10.03-Shalaev.mp3The photon is the ultimate unit of information because it packages data in a signal of zero mass and has unmatched speed. The power of light is driving the photonicrevolution, and information technologies, which were formerly entirely electronic, are increasingly enlisting light to communicate and provide intelligent control. Plasmonic nanophotonics promises to create entirely new prospects for guiding light on the nanoscale, some of which may have revolutionary impact on present-day optical technologies.00:58:48nocircuits, devices, nanotransistors, quantum dots, nanophotonics, tutorial, metamaterials, hosted/taped by NCN@Purdue, plasmonics, from Purdue, negative index refraction, materials scienceVladimir M. ShalaevVladimir M. ShalaevOnline PresentationsTue, 04 Oct 2005 09:00:00 +0000http://nanohub.org/site/resources/2006/07/01646/2005.10.03-Shalaev.mp3