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When optical components are reduced to the nanoscale, they exhibit interesting properties that can be harnessed to create new devices. For example, imagine a block of material with thin layers of alternating materials. This creates a periodic arrangement of alternating dielectric constants, forming a "photonic crystal" that is analogous to the electronic crystals used in semiconductor devices. Photonic crystals, along with quantum dots and other devices patterned at the nanoscale, may form the basis for sensors and switches used in computers and telecommunications. More information on Nanophotonics can be found here.
Solar Cells Numerical Solution
08 Jun 2010 | Contributor(s):: Dragica Vasileska
This is an MS Thesis of Balaji Padmanabhan, a student of Prof. Vasileska. It describes numerical solution details for the 3D drift-diffusion equations as applied to modeling 1D-3D solar cells.
Physical and Mathematical Description of the Operation of Photodetectors
08 Jun 2010 | | Contributor(s):: Dragica Vasileska
This set of slides describes physical and mathematical description of the operation of photodetectors including important figures of merit.
Illinois iOptics Seminar Series
17 May 2010 | | Contributor(s):: Gabriel Popescu, Mustafa Mir, Vikram Chaudhery, Brian Cunningham
The Optical Society of America and the SPIE local student chapters are sponsoring the 2nd iOptics seminar series.The series includes lectures from graduate students, post-docs and faculty working at the cutting edge of optics and photonics research.
Illinois iOptics Lecture 3: A tissue scattering-phase theorem
17 May 2010 | | Contributor(s):: Gabriel Popescu
We have derived two mathematical relationships between quantitative phase images of thin tissue slices and the scattering parameters of the bulk, i.e. scattering mean free path, ls, and anisotropy factor, g. The ls turns out to be inversely proportional to the mean-squared phase shift and g is...
Illinois iOptics Lecture 5: Deposited Nanorod Films for Biosensor Applications
17 May 2010 | | Contributor(s):: Brian Cunningham
Planar photonic crystals have been used as the basis of many biological sensing devices. Here, we successfully demonstrated that the combination of a photonic crystal structure and a dielectric nanorod coating prepared by the glancing angle deposition technique can lead to significant increases...
Illinois iOptics Lecture 2: Curavature induced time-domain impedance
17 May 2010 | | Contributor(s):: Jont B. Allen
Abstract for this talk is available as a PDF in supporting materials. Click here to view.
Renewable Energy Sources
17 May 2010 | | Contributor(s):: Dragica Vasileska
This presentation in pictures describes possibilities and utilization of alternative (green) sources of energy. Many sources contributed in the creation of this presentation.vasileska.faculty.asu.eduNSF
Developments in Metamaterials and Transformation Optics
29 Mar 2010 | | Contributor(s):: David R. Smith
Metamaterials—artificially structured microcircuits that can mimic the electromagnetic response of atoms and molecules—have vastly expanded the opportunities available for the design of electromagnetic structures. Starting in 2000 with the first report of a “left-handed” metamaterial, for which...
Photonic Crystals via Confinement of Anisotropic Colloids
02 Mar 2010 | | Contributor(s):: Mohammad Mayy, Chekesha Liddell
Controlling light-matter interactions with materials structured at micron and submicron length scales has been predicted as the basis for enhancements in the performance of a range of technologies, including photovoltaics, sensors and solid state lighting devices. However, the types of...
Modeling and Optimization of Polymer Based Bulk Heterojunction (BH) Solar Cell
15 Feb 2010 | | Contributor(s):: Biswajit ray
A polymer phase separation model based on Cahn-Hilliard equation and a three-dimensional (3D) coupled exciton/electron/hole transport model in the disordered, phase-segregated morphology so generated, allow us to predict, possibly for the first time, the morphology dependent performance limits...
McCoy Lecture: Transforming Light with Metamaterials: A New Paradigm for the Science of Light
15 Feb 2010 | | Contributor(s):: Vladimir M. Shalaev
One of the most unique properties of light is that it can package information into a signal of zero mass and propagate it at the ultimate speed. It is, however, a daunting challenge to bring photonic devices to the nanometer scale because of the fundamental diffraction limit. Metamaterials can...
BNC Annual Research Review: Transforming Light with Metamaterials
ANGEL - A Nonequilibrium Green's Function Solver for LEDs
07 Feb 2010 | | Contributor(s):: sebastian steiger
Introducing ANGEL, a Nonequilibrium Green’s Function code aimed at describing LEDs.ANGEL uses a description close to the classic NEMO-1D paper (Lake et al., JAP 81, 7845 (1997)) to model quantum transport in a light-emitting diode (LED).ANGEL is the first 1D-heterostructure NEGF to include the...
Transformation Optics at Optical Frequencies
03 Feb 2010 | | Contributor(s):: John Pendry
Metamaterials, i.e. artificial materials with rationally designedgeometry, composition, and arrangement of nanostructured building blocksare opening a gateway to unprecedented electromagnetic properties andfunctionalities that are unattainable with naturally occurringmaterials....
Metamaterials with low loss and gain
28 Jan 2010 | | Contributor(s):: Mikhail A. Noginov
Optical loss caused by absorption in metal and a need for active control are among the major challenges of plasmonic metamaterials. Both can be addressed by utilizing optical gain. Recent efforts aimed at the reduction of loss and the stimulated emission in nanoplasmonic systems with gain will...
Illinois ME 498 Introduction of Nano Science and Technology, Lecture 27: Optical Methods
21 Jan 2010 | | Contributor(s):: Nick Fang, Omar Sobh
Optical MathodsTopics: Photomask and Reticles Positive and Negative Lithography Relationship between Mask and Resist 8 Steps of Photolithography Photolithographic Process Positive Photoresists Negative Photoresists Chemistry of Photo-Crosslinking A simplified Model of Polymerization Photoresist...
Illinois ME 498 Introduction of Nano Science and Technology, Lecture 26: Nanomanufacturing 1: Semiconductor Manufacturing
20 Jan 2010 | | Contributor(s):: Nick Fang, Omar Sobh
Nanomaterials and Devices for Solar EnergyTopics: From Si crystals to Wafers From Wafers to Chips Photolithography: Definitions Optical Lithography Multi-Photon Lithography E-Beam Lithography Imprinting Lithography Scanning probe lithography Additive Processes Thermal Oxidation Diffusion Thermal...
Illinois 2009 nano-biophotonics Summer School, Lecture 16: Functional DNA Nanotechnology in Sensing and Imaging
05 Jan 2010 | | Contributor(s):: Yi Lu
Functional DNA Nanotechnology in Sensing and ImagingTopics: Science & Technology Gap in Nanobiotechnology Metabolites and Markers in Biology and Environment Instrumental Analysis for Metabolites and BioMarkers Four Key Steps in Designing Sensors Functional DNA, a new Paradigm in Biology?...
Illinois 2009 nano-biophotonics Summer School, Lecture 17: Fluorescence lifetime-resolved imaging, and some ways to finesse information from complex biological samples
05 Jan 2010 | | Contributor(s):: Kimani C Toussaint
Fluorescence lifetime-resolved imaging, and some ways to finesse information from complex biological samplesTopics: What is a Lifetime? What can Lifetimes tell us? How do we Measure Lifetimes? Early Attempts at Measuring nanosecond florescence lifetimes Fluorescence lifetime-resolved imaging...
Illinois 2009 nano-biophotonics Summer School, Lecture 18: Bond-Selective Imaging based on Coherent Raman Scattering
Bond-Selective Imaging based on Coherent Raman ScatteringTopics: Imaging Cells in a Tissue Microenvironment Nonlinear Optical (NLO) Microscopy Combining Two-photon Excited Fluorescence (TPEF)with Second Harmonic Generation (SHG) Raman Scattering Biggest Challenge in Raman Imaging - Very Weak...