The optical domain

Ebook "Molecular quantum dynamics: From theory to applications" focuses on current applications of molecular quantum dynamics. Examples from all main subjects in the field, presented by the internationally renowned experts, illustrate the importance of the domain. Recent success in helping to understand experimental observations in fields like heterogeneous catalysis, photochemistry, reactive scattering, optical spectroscopy, or femto- and attosecond chemistry and spectroscopy underline that nuclear quantum mechanical effects affect many areas of chemical and physical research.

281p tudohanhtau1006 29-03-2024 5 1   Download

Ebook Atoms in electromagnetic fields (Second edition): Part 1 includes contents: Atoms in weak broadband quasiresonant light fields, light shifts — linear superpositions of atomic sublevels; atoms in intense resonant laser beams the dressed atom approach in the optical domain,...

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A new multispectral InGaZnO (IGZO) thin-film phototransistor (TF PT) based on a graded band-gap (GBG) SiGe capping layer with metallic nanoparticles (MNPs) is proposed. An accurate drain-current model is developed to investigate the device performances, where the optical characteristics under different light excitations (530 nm, 820 nm, and 1550 nm) are analyzed using the 3-D Finite-difference time-domain method (FDTD).

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Magnetic vortices have been an interesting element in the past decades due to their flux-closure domain structures which can be stabilized at ground states in soft ferromagnetic microstructures.

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We propose a new optical processor that implement an optical vector matrix multiplication (OVMM) or dot product circuit using multimode interference (MMI) based microring resonator structures. Our structure can be integrated into only one single chip without the need of wavelength division multiplexers (WDM). The control of weight and input signals is based on the graphene material for high speed computing.

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We present a new method for image compression using the Haar wavelet transform (HWT) in all-optical domain. The proposed architecture is based on the optical Haar wavelet transform using only one 6×6 multimode interference (MMI) coupler.

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In this study, we present a method for all-optical image compression using all-optical Karhunen-Loeve transform (KLT). The KLT was designed in all-optical domain using only one multimode interference (MMI) coupler. The Karhunen-Loeve transform (KLT) is very attractive for image processing applicaons due to its computing efficiency, residual correlation, and rate distortion criteria benefits.

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Retinal diseases are common in dogs. Some hereditary retinal dystrophies in dogs are important not only because they lead to vision loss but also because they show strong similarities to the orthologous human conditions. Advances in in vivo non-invasive retinal imaging allow the capture of retinal cross-section images that parallel low power microscopic examination of histological sections.

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The magnetic properties and domain structure of (CoFeB/Pd)n (n = 2  10) multilayers prepared by DC magnetron sputtering with perpendicular magnetic anisotropy have been investigated systematically. The study has been carried out by using vibration sample magnetometer (VSM) and magneto-optical Kerr effect (MOKE) microscope. The results show clear changes of magnetic hysteresis and domain structure when increasing the number of bilayer (n) from 2 to 10.

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This paper presents a detailed review of recent developments in modulation schemes, transmitter and receiver domains which will enable the realization of future high performance and cost-effective indoor optical wireless systems.

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The results show that the AuNPs exhibited a single plasmonic resonance, the AuNRs displayed two identical and separated modes of the resonance, and the random Au nano-islands presented a very broad resonance. Specifically, tailoring the anisotropy of the Au nanorods enabled extending their resonant frequencies from the visible to the near infrared region, which is in accordance with the finite different time domain simulations.

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Transmission: the propagation of a signal, message, or other form of intelligence by any means such as optical fiber, wire, or visual means. Switching: selects the route to the desired destination that the transmitted signal travels by the closing of switches in either the space domain or the time domain or some combinations of the two.

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The dissemination of micro-electronics during the 1980s led to innovation. On the leading edge of these technologies was the machine tool subsector. However, the Japanese were the first to apply advanced controls and gained shares in global markets propelled by their lead. Since then Europe has caught up and ME competes at eye level with Japan. 10 A detailed assessment of the technological position in this area and other fields of relevance for ME, such as nanotechnology, optics, new materials and composites, is performed in Chapter 0.

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Neuronal PAS domain protein 2 (NPAS2) is a circadian rhythm-associated transcription factor with two heme-binding sites on two PAS domains. In the present study, we compared the optical absorption spectra, resonance Raman spectra, heme-binding kinetics and DNA-binding characteristics of the isolated fragment containing the N-terminal basic helix–loop–helix (bHLH) of the first PAS (PAS-A) domain of NPAS2 with those of the PAS-A domain alone.

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Regeneration-induced CNPase homolog (RICH) is an axonal growth-associated protein, which is induced in teleost fish upon optical nerve injury. RICH consists of a highly acidic N-terminal domain, a catalytic domain with 2¢,3¢-cyclic nucleotide 3¢-phosphodiesterase (CNPase) activity and a C-terminal isoprenylation site.

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Human serum albumin (HSA) is known for its exceptional ligand-binding capacity; indeed, its modular domain organization provides a variety of ligand-binding sites. Its flexible modular structure involves more than the immediate vicinity of the binding site(s), affecting the ligand-binding prop-erties of the whole protein.

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Two samples were also analysed for polychlorinated dioxins and furans (PCDD/Fs), a class of chemical that can be formed during the combustion of materials present in e-waste. Soil from an open burning site was moderately contaminated, while sediment from the Agbogbloshie lagoon contained a very high level of these highly toxic, highly persistent and bioaccumulative chemicals, at a level just below the threshold defined as being indicative of serious contamination for sediments in the Netherlands.

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Coherent Lightwave Systems The lightwave systems discussed so far are based on a simple digital modulation scheme in which an electrical bit stream modulates the intensity of an optical carrier inside the optical transmitter and the optical signal transmitted through the fiber link is incident directly on an optical receiver, which converts it to the original digital signal in the electrical domain. Such a scheme is referred to as intensity modulation with direct detection (IM/DD).

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Multichannel Systems In principle, the capacity of optical communication systems can exceed 10 Tb/s because of a large frequency associated with the optical carrier. In practice, however, the bit rate was limited to 10 Gb/s or less until 1995 because of the limitations imposed by the dispersive and nonlinear effects and by the speed of electronic components. Since then, transmission of multiple optical channels over the same fiber has provided a simple way for extending the system capacity to beyond 1 Tb/s.

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Optical Amplifiers As seen in Chapter 5, the transmission distance of any fiber-optic communication system is eventually limited by fiber losses. For long-haul systems, the loss limitation has traditionally been overcome using optoelectronic repeaters in which the optical signal is first converted into an electric current and then regenerated using a transmitter. Such regenerators become quite complex and expensive for wavelength-division multiplexed (WDM) lightwave systems.

53p khinhkha 29-07-2010 79 10   Download