proceedings of spie - RUA
... Holographic polymer dispersed liquid crystals (H-PDLC) are made by holographic recording in a photo-polymerization
induced phase separation process in which the liquid crystal molecules diffuse to dark zones in the diffraction grating.
Afterwards they can be oriented by means of an electric field. T ...
Development of the virtual light microscope for a material science
... Flash. This allows the access to the microscope for users without
the regard on the used operating system. The functionality of the
microscope was tested in systems Windows 98/Me,
Windows 2000/Xp, Mandriva Linux 2006, and FreeBSD, without
any problems in every case [12-15].
Metallographic light micr ...
Self-Phase-Modulation of Optical Pulses
... • The nonlinear chirp near the peak of the pulse is positive – the
frequency sweeps from a negative shift to a positive shift. The
positive sign of the chirp is determined by the fact that n2 is positive.
• Normally dispersive media advance low frequencies and
decompression of nonlinearly chirped pu ...
NONLINEAR OPTICAL PROPERTIES OF NATURAL
... integrated components in numerous devices in bulk, micro and nanoscaled forms. The global market for NLO materials was estimated to be
about $856.1 million in 2005 and $1,656 billion in 2009 with a yearly
average growth of about 5-7% [Bus-2005].
From fundamental perspectives, the NLO optical respons ...
Smart Materials, Precision Sensors/Actuators, Smart Structures, and
... Many electroactive functional materials have been used in small- and microscale
transducers and precision mechatronic control systems for years. It was not until the
mid-1980s that scientists started integrating electroactive materials with large-scale
structures as in situ sensors and/or actuators, ...
... negative µ for incident electromagnetic radiation of a particular frequency. Furthermore, if the metal structures are
each much smaller than the wavelength of the incident radiation, the radiation interacts with them not individually,
but collectively, according to their average properties. These ar ...
Activities and Findings - LIGO
... The current design for Advanced LIGO detectors includes gravitational wave signal
recycling. This configuration allows a modification in the frequency response of the
interferometer and offers the possibility of a tailored response for a targeted source. The
increase in the complexity of the interfe ...
Slides - Jung Y. Huang
... Maximum-entropy phase-retrieval procedure for sum-frequency
Time-resolved two-dimensional infrared absorption correlation
spectroscopy of ferroelectric liquid crystal (FLC) without and
with a doping of zinc oxide nanoparticles
Active spectroscopy to guide the evolution of a ...
lecture 2 Fiber properties
... Macrobend losses are observed when a fiber
bend's radius of curvature is large compared to the
Light propagating at the inner side of the bend
travels a shorter distance than that on the outer
To maintain the phase of the light wave, the mode
phase velocity must increase.
... microns will radiate only 7% of what a black body would at
200oK while radiating more than 40% at 400oK. 3D PBG
materials may also find application in thermophotovoltaic
energy generation and scavenging, as well as in wide field
of view spectral filtering. Sandia National Laboratory is
- ePrints Soton
... The photonic crystal consists of two dielectrics with different permittivity assumed to be constant .
These two dielectrics are arranged alternately in three dimensions. While the space between the two
components is reduced to be as small as ~1µm, or even smaller, light beam with a particular fre ...
Electromagnetic Field Basics
... can electromagnetically couple into another wire, then it can also electromagnetically
couple into itself. This creates an induced (coupled) signal on the wire that opposes the
driving signal that creates it in the first place. It may take a brief period of time for the
driving signal to overcome th ...
... When voltage is applied between electrodes
Electrons leave the cathode
Holes move from anode
+ ve holes are much more mobile than – ve
• So holes moves across from HTL to emissive layer
• Recombination of electron hole pair leads to
creation of a photon with frequency between
LUMO & HOMO l ...
Recent Advances in ALON Optical Ceramic
... fabrication steps but also the most suitable equipment for fabricating these very hard, ceramic materials.
Configuration of the optical component, curved or plano, were considered in this evaluation process. Many
conventional processing options are viable for fabrication of plano configurations of t ...
Transformation optics applies metamaterials to produce spatial variations, derived from coordinate transformations, which can direct chosen bandwidths of electromagnetic radiation. This can allow for the construction of new composite artificial devices, which probably could not exist without metamaterials and coordinate transformation. Computing power that became available in the late 1990s enables prescribed quantitative values for the permittivity and permeability, the constitutive parameters, which produce localized spatial variations. The aggregate value of all the constitutive parameters produces an effective value, which yields the intended or desired results.Hence, complex artificial materials, known as metamaterials, are used to produce transformations in optical space.The mathematics underpinning transformation optics is similar to the equations that describe how gravity warps space and time, in general relativity. However, instead of space and time, these equations show how light can be directed in a chosen manner, analogous to warping space. For example, one potential application is collecting sunlight with novel solar cells by concentrating the light in one area. Hence, a wide array of conventional devices could be markedly enhanced by applying transformation optics.