Analysis of the dispersion of optical plastic materials
About: This article is published in Optical Materials.The article was published on 2007-07-01. It has received 439 citations till now. The article focuses on the topics: Dispersion (optics).
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TL;DR: The continuous tuning of the electronic structure of atomically thin MoS2 on flexible substrates by applying a uniaxial tensile strain demonstrates the potential of two-dimensional crystals for applications in flexible electronics and optoelectronics.
Abstract: We demonstrate the continuous tuning of the electronic structure of atomically thin MoS2 on flexible substrates by applying a uniaxial tensile strain. A redshift at a rate of ~70 meV per percent applied strain for direct gap transitions, and at a rate 1.6 times larger for indirect gap transitions, have been determined by absorption and photoluminescence spectroscopy. Our result, in excellent agreement with first principles calculations, demonstrates the potential of twodimensional crystals for applications in flexible electronics and optoelectronics.
730 citations
TL;DR: In this article, the authors demonstrate the continuous tuning of the electronic structure of atomically thin MoS2 on flexible substrates by applying a uniaxial tensile strain.
Abstract: We demonstrate the continuous tuning of the electronic structure of atomically thin MoS2 on flexible substrates by applying a uniaxial tensile strain. A redshift at a rate of ∼70 meV per percent applied strain for direct gap transitions, and at a rate 1.6 times larger for indirect gap transitions, has been determined by absorption and photoluminescence spectroscopy. Our result, in excellent agreement with first principles calculations, demonstrates the potential of two-dimensional crystals for applications in flexible electronics and optoelectronics.
690 citations
TL;DR: In this paper, the dispersion properties of dierent types of optical polymers are discussed on the base of measured refractive indices and the Cauchy-Schott approximation, and a number of dispersion curves are presented in the visible and near infrared spectral regions between 400 and 1060 nm.
Abstract: In this report dispersion properties of dierent types of optical polymers are discussed on the base of measured refractive indices and the Cauchy‐Schott approximation. A number of dispersion curves are presented in the visible and near infrared spectral regions between 400 and 1060 nm. A comparison with some optical glasses with similar refraction is performed. The nonlinear dependence of dn=d‚ of polymer materials and test glasses on the wavelength is calculated and analyzed. Normalized dispersion curves at 550 nm and 880 nm are presented to illustrate better the dispersion of the polymers in the considered spectral regions, separately. Abbe numbers are calculated to exhibit the mean and partial dispersion.
448 citations
TL;DR: In this article, a review of different types of concentration photovoltaic (CPV) systems, their various design advantages and limitations, and noticeable trends is presented. But the focus of this review is on the optical properties of the concentrators.
Abstract: Concentrating photovoltaic (CPV) systems are a key step in expanding the use of solar energy. Solar cells can operate at increased efficiencies under higher solar concentration and replacing solar cells with optical devices to capture light is an effective method of decreasing the cost of a system without compromising the amount of solar energy absorbed. However, CPV systems are still in a stage of development where new designs, methods and materials are still being created in order to reach a low levelled cost of energy comparable to standard silicon based PV systems. This article outlines the different types of concentration photovoltaic systems, their various design advantages and limitations, and noticeable trends. This will include comparisons on materials used, optical efficiency and optical tolerance (acceptance angle). As well as reviewing the recent development in the most commonly used and most established designs such as the Fresnel lens and parabolic trough/dish, novel optics and materials are also suggested. The aim of this review is to provide the reader with an understanding of the many types of solar concentrators and their reported advantages and disadvantages. This review should aid the development of solar concentrator optics by highlighting the successful trends and emphasising the importance of novel designs and materials in need of further research. There is a vast opportunity for solar concentrator designs to expand into other scientific fields and take advantage of these developed resources. Solar concentrator technologies have many layers and factors to be considered when designing. This review attempts to simplify and categorise these layers and stresses the significance of comparing as many of the applicable factors as possible when choosing the right design for an application. From this review, it has been ascertained that higher concentration levels are being achieved and will likely continue to increase as high performance high concentration designs are developed. Fresnel lenses have been identified as having a greater optical tolerance than reflective parabolic concentrators but more complex homogenisers are being developed for both system types which improve multiple performance factors. Trends towards higher performance solar concentrator designs include the use of micro-patterned structures and attention to detailed design such as tailoring secondary optics to primary optics and vice-versa. There is still a vast potential for what materials and surface structures could be utilised for solar concentrator designs especially if inspiration is taken from biological structures already proven to manipulate light in nature.
214 citations
TL;DR: Using a transmission-spectrum-based method, the refractive index of a 50 μm thick sample of poly(methyl methacrylate) (PMMA) was measured as a function of wavelength to mitigate the effects of nonplane-parallel surfaces.
Abstract: Using a transmission-spectrum-based method, the refractive index of a 50 μm thick sample of poly(methyl methacrylate) (PMMA) was measured as a function of wavelength. To mitigate the effects of nonplane-parallel surfaces, the sample was measured at 16 different locations. The technique resulted in the measurement of index at several thousand independent wavelengths from 0.42 to 1.62 μm, with a relative RMS accuracy <0.5×10(-4) and absolute accuracy <2×10(-4).
200 citations
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References
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Book•
01 Jan 1957
TL;DR: The Slide Projector: a Module on Geometrical and Physical Optics as mentioned in this paper is a module on geometrical optics and physical optics that is used to demonstrate models for Selected Phenomena in GOPs.
Abstract: Introduction to OpticsGeometric and Physical Optics LaboratoryMechanical Waves, Sound, Light, Geometric and Physical OpticsIntroduction to Geometrical and Physical OpticsDemonstration Models for Selected Phenomena in Geometrical and Physical OpticsManual of Experients in Geometric and Physical OpticsGeometrical and Physical OpticsGeometrical and Physical OpticsPrinciples of Physical OpticsPhysical OpticsIntroduction to Geometrical and Physical OpticsGeometrical and Physical OpticsConcepts and Problem Solving in Geometrical and Physical OpticsPhysical OpticsThe Mathematics of Geometrical and Physical OpticsGeometric, Physical, and Visual OpticsGeometrical and Physical Optics WorkbookThe Slide ProjectorGeometrical Theory of Diffraction for Electromagnetic WavesGeometrical Optics in Engineering PhysicsThe Slide Projector: a Module on Geometric and Physical OpticsIntroduction to Geometrical and Physical OpticsGeometrical and Physical OpticsFundamentals of Geometrical and Physical OpticsRadar cross section prediction using ray casting, geometrical optics and physical opticsHandbook of Optics, Third Edition Volume I: Geometrical and Physical Optics, Polarized Light, Components and Instruments(set)Geometrical and Physical OpticsIntroduction to geometrical and physical opticsHandbook of OpticsGeometrical OpticsElectro-Optical Sensor SystemsHandbook of Optics: Geometrical and physical optics, polarized light, components and instrumentsUnderstanding Physical OpticsResearch as a Guide for the Development of Tutorials to Improve Student Understanding of Geometrical and Physical OpticsGeometrical and Physical OpticsGeometrical & Physical OpticsLaboratory Manual for Geometrical and Physical OpticsGeometrical and Physical Optics, By R.S. LonghurstGeometrical and Physical OpticsIntroduction to Optics
480 citations
TL;DR: The main optical plastics are analyzed: poly(methyl methacrylate), polystyrene, polycarbonate, and styrene acrylonitrile, and new materials, such as methyl methACrylate styrene copolmer, CTE-Richardson, Zeonex, Optorez, and Bayer are examined.
Abstract: Some new refractometric results are obtained in the visible and the near-infrared spectral regions. The main optical plastics are analyzed: poly(methyl methacrylate), polystyrene, polycarbonate, and styrene acrylonitrile. New materials, such as methyl methacrylate styrene copolmer, CTE-Richardson, Zeonex, Optorez, and Bayer are examined. The refractive indices are measured for wavelengths from 435.8 to 1052 nm with a new device. Abbe constants and dispersion coefficients are calculated. The measured and computed data is intended for designers and technologists.
120 citations
TL;DR: In this article, modern geometrical optics were used for the first time in the field of modern geometry optics, and the results showed that they were effective in improving the performance of traditional geometry optics.
Abstract: Modern geometrical optics , Modern geometrical optics , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
97 citations
01 Jan 1958
TL;DR: In this article, modern geometrical optics were used for the first time in the field of modern geometry optics, and the results showed that they were effective in improving the performance of traditional geometry optics.
Abstract: Modern geometrical optics , Modern geometrical optics , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
73 citations