Direct spatiotemporal measurements of accelerating ultrashort
... demonstrated [2–8]. Their distortion-free and superluminal propagation along the cylindricalsymmetry axis has also been observed. More recently, a type of laterally accelerating localized wave called an Airy beam (or pulse, if generated using ultrashort pulses), has attracted attention [9–11]. Pulse ...
... demonstrated [2–8]. Their distortion-free and superluminal propagation along the cylindricalsymmetry axis has also been observed. More recently, a type of laterally accelerating localized wave called an Airy beam (or pulse, if generated using ultrashort pulses), has attracted attention [9–11]. Pulse ...
Nanowire Grid Polarizers for Mid- and Long-Wavelength
... The wire grid polarizer (WGP) remains one of the most useful optical components in the field and is prevalent in applications ranging from imaging and displays to communications and scientific instrumentation. The WGP typically consists of an array of metallic lines with sub-wavelength pitch support ...
... The wire grid polarizer (WGP) remains one of the most useful optical components in the field and is prevalent in applications ranging from imaging and displays to communications and scientific instrumentation. The WGP typically consists of an array of metallic lines with sub-wavelength pitch support ...
Window strength and environments
... application, it can be made aspheric (i.e. Schmidt camera) or meniscus-shaped (i.e. Maksutov telescope) in which case it is called a shell. For a deep shell, it is called a dome. A window can have some effects on the image quality depending on its thickness, shape and type of incident beam (collimat ...
... application, it can be made aspheric (i.e. Schmidt camera) or meniscus-shaped (i.e. Maksutov telescope) in which case it is called a shell. For a deep shell, it is called a dome. A window can have some effects on the image quality depending on its thickness, shape and type of incident beam (collimat ...
A light scattering study of non equilibrium fluctuations
... In this article, we introduce dynamic near field scattering as a powerful tool to study NEFs. Near field scattering (NFS) has been introduced in the late 1990’s as an alternative to conventional static and dynamic light scattering.23–26 In a NFS experiment, one typically observes the heterodyne cont ...
... In this article, we introduce dynamic near field scattering as a powerful tool to study NEFs. Near field scattering (NFS) has been introduced in the late 1990’s as an alternative to conventional static and dynamic light scattering.23–26 In a NFS experiment, one typically observes the heterodyne cont ...
Διαφάνεια 1
... 1st forbidden frequency domain: ω/c = kz/neq where neq: equivalent index of silica + holes and it is λ dependant Grey area corresponds to the classical guiding in fibers by TIR for which as long as k z/neq ≥ ω/c (=kfree space) the wave propagating in the core is confined there (no refraction) 2nd fo ...
... 1st forbidden frequency domain: ω/c = kz/neq where neq: equivalent index of silica + holes and it is λ dependant Grey area corresponds to the classical guiding in fibers by TIR for which as long as k z/neq ≥ ω/c (=kfree space) the wave propagating in the core is confined there (no refraction) 2nd fo ...
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... micron-thick sample by producing 10 frames in less than 5 ms. For repetitive processes, one can use only xy-scanning, refocusing it at different depth step-by step. The speed of imaging depends on many additional factors, such as needed contrast (integration time), size of the scanned area, camera a ...
... micron-thick sample by producing 10 frames in less than 5 ms. For repetitive processes, one can use only xy-scanning, refocusing it at different depth step-by step. The speed of imaging depends on many additional factors, such as needed contrast (integration time), size of the scanned area, camera a ...
Wavefront retrieval of amplified femtosecond
... Gigawatt and terawatt femtosecond lasers based on CPA technology [1], able to produce high peak intensities, are routinely used in high-field physics [2]. To focus these pulses near to diffraction limit [3], a good beam quality is required [4]. However, wavefront aberrations due to thermal effects, ...
... Gigawatt and terawatt femtosecond lasers based on CPA technology [1], able to produce high peak intensities, are routinely used in high-field physics [2]. To focus these pulses near to diffraction limit [3], a good beam quality is required [4]. However, wavefront aberrations due to thermal effects, ...
Birefringent Thin Films for LCDs Pochi Yeh
... Most sheet polarizers in LCDs are made of uniaxial materials which exhibit a strong attenuation for the extraordinary wave. Such polarizers, known as O-type polarizers, thus transmit ordinary wave and extinguish the extraordinary wave. The transmission of a beam of unpolarized light can be written ...
... Most sheet polarizers in LCDs are made of uniaxial materials which exhibit a strong attenuation for the extraordinary wave. Such polarizers, known as O-type polarizers, thus transmit ordinary wave and extinguish the extraordinary wave. The transmission of a beam of unpolarized light can be written ...
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... defects; therefore, the mass production of uniform, defect-free, large-area 3D photonic structures, in particular with narrowband diffraction in the visible spectrum is limited.[8] For example, producing highquality monodisperse, highly-charged polystyrene particles through emulsion polymerization t ...
... defects; therefore, the mass production of uniform, defect-free, large-area 3D photonic structures, in particular with narrowband diffraction in the visible spectrum is limited.[8] For example, producing highquality monodisperse, highly-charged polystyrene particles through emulsion polymerization t ...
Alkali-metal atoms in laser fields: optical pumping, coherent
... that are due to the coupling between the Doppler shift and the interaction times through the longitudinal velocity of the atoms. Using coherent population trapping (CPT) in 85 Rb, an all-optical atomic clock has been realized. The good noise properties of the diode laser, an optimized buffer gas, an ...
... that are due to the coupling between the Doppler shift and the interaction times through the longitudinal velocity of the atoms. Using coherent population trapping (CPT) in 85 Rb, an all-optical atomic clock has been realized. The good noise properties of the diode laser, an optimized buffer gas, an ...
High-resolution Measurement of Refractive Index Based on Resonant Tunneling Effect
... Owing to the broad range of applications just mentioned, new measuring principles and methods of refractive index are constantly appearing. Many devices based on different principles have been proposed, such as angular surveying instrument, interferometric testing apparatus, F-P interference sensor, ...
... Owing to the broad range of applications just mentioned, new measuring principles and methods of refractive index are constantly appearing. Many devices based on different principles have been proposed, such as angular surveying instrument, interferometric testing apparatus, F-P interference sensor, ...
Direct welding of fused silica with femtosecond fiber laser
... Development of techniques for joining and welding materials on a micrometer scale is of great importance in a number of applications, including life science, sensing, optoelectronics and MEMS packaging. In this paper, methods of welding and sealing optically transparent materials using a femtosecond ...
... Development of techniques for joining and welding materials on a micrometer scale is of great importance in a number of applications, including life science, sensing, optoelectronics and MEMS packaging. In this paper, methods of welding and sealing optically transparent materials using a femtosecond ...
Microscopy - PSSurvival.com
... microscopic. Recovery of the protein crystals requires imaging which can be done by the intrinsic fluorescence of the protein or by using transmission microscopy. Both methods require an ultraviolet microscope as protein absorbs light at 280 nm. Protein will also fluorescence at approximately 353 nm ...
... microscopic. Recovery of the protein crystals requires imaging which can be done by the intrinsic fluorescence of the protein or by using transmission microscopy. Both methods require an ultraviolet microscope as protein absorbs light at 280 nm. Protein will also fluorescence at approximately 353 nm ...
Ab initio nanoplasmonics: The impact of atomic structure
... [20–22]. While these semiclassical approximations have been successfully applied in many cases, they do not achieve the precision provided by first-principle calculations. A number of recent publications [20,23–27] have treated the electronic response of plasmonic structures using stateof-the-art ti ...
... [20–22]. While these semiclassical approximations have been successfully applied in many cases, they do not achieve the precision provided by first-principle calculations. A number of recent publications [20,23–27] have treated the electronic response of plasmonic structures using stateof-the-art ti ...
Mirror contamination in space I: mirror modelling
... (Krijger et al., 2005b; Tilstra et al., 2012). This has been referred to as the scan-angle-dependent degradation. This problem is becoming more pressing with the increasing number of long-term (climate) trend studies. Our hypothesis is that both scan mirrors and surface diffusers suffer from a thin ...
... (Krijger et al., 2005b; Tilstra et al., 2012). This has been referred to as the scan-angle-dependent degradation. This problem is becoming more pressing with the increasing number of long-term (climate) trend studies. Our hypothesis is that both scan mirrors and surface diffusers suffer from a thin ...
Distributed nonlinear fiber chirped-pulse amplifier system
... amplifier while retaining a nonlinear phase close to the minimum for this set of constraints. It remains that the nonlinear phase is high (around 60 rad), and simulations must be performed to find out whether or not a good quality pulse can be obtained in this highly nonlinear regime. Indeed, althou ...
... amplifier while retaining a nonlinear phase close to the minimum for this set of constraints. It remains that the nonlinear phase is high (around 60 rad), and simulations must be performed to find out whether or not a good quality pulse can be obtained in this highly nonlinear regime. Indeed, althou ...
Adaptive secondary mirrors
... • If sodium layer is illuminated with a single frequency laser tuned to the peak of the D2 line only a few per cent (of order 10 MHz/1GHz) of the atoms travel in a direction to interact at all with the radiation field. • These atoms interact strongly with the radiation until they collide or change d ...
... • If sodium layer is illuminated with a single frequency laser tuned to the peak of the D2 line only a few per cent (of order 10 MHz/1GHz) of the atoms travel in a direction to interact at all with the radiation field. • These atoms interact strongly with the radiation until they collide or change d ...
Introduction - Research
... As per the requirements above, a device was made that was easy to fabricate, transparent, and biologically inert. The natural choice was to use a polydimethylsiloxane (PDMS) device that meets all the above specifications and is very quick to make (<24 hrs design to final). The PDMS device was fabric ...
... As per the requirements above, a device was made that was easy to fabricate, transparent, and biologically inert. The natural choice was to use a polydimethylsiloxane (PDMS) device that meets all the above specifications and is very quick to make (<24 hrs design to final). The PDMS device was fabric ...
Physics Laboratory Manual PHYC 20080 Fields, Waves and Light
... Example: A string on a bass guitar is 1m long and held under a tension of 100N. If the string has a mass of 10g, what is the velocity of a wave on the string? Include the velocity calculation and its value in your report. If a wave with a frequency of 50Hz is sent into the string, what will its wave ...
... Example: A string on a bass guitar is 1m long and held under a tension of 100N. If the string has a mass of 10g, what is the velocity of a wave on the string? Include the velocity calculation and its value in your report. If a wave with a frequency of 50Hz is sent into the string, what will its wave ...