Propagation of obstructed Bessel and Bessel–Gauss
... These equations represent the Rayleigh length, the beam width, the radius of curvature of the wavefronts and the Guoy phase of a Gaussian beam respectively. The Rayleigh length determines the distance over which a Gaussian beam can propagate without diverging significantly and depends on the beam wi ...
... These equations represent the Rayleigh length, the beam width, the radius of curvature of the wavefronts and the Guoy phase of a Gaussian beam respectively. The Rayleigh length determines the distance over which a Gaussian beam can propagate without diverging significantly and depends on the beam wi ...
PLASMONICS: FUNDAMENTALS AND APPLICATIONS
... on its head? Or that you could squeeze light into places less that one hundredth of a wavelength in size? No new fundamental particles, no new cosmology but surprises, adventure, the quest to understand - yes, we have all of those, and more. It seems that four elements underlie research in plasmonic ...
... on its head? Or that you could squeeze light into places less that one hundredth of a wavelength in size? No new fundamental particles, no new cosmology but surprises, adventure, the quest to understand - yes, we have all of those, and more. It seems that four elements underlie research in plasmonic ...
Plasmonics: Fundamentals and Applications
... on its head? Or that you could squeeze light into places less that one hundredth of a wavelength in size? No new fundamental particles, no new cosmology but surprises, adventure, the quest to understand - yes, we have all of those, and more. It seems that four elements underlie research in plasmonic ...
... on its head? Or that you could squeeze light into places less that one hundredth of a wavelength in size? No new fundamental particles, no new cosmology but surprises, adventure, the quest to understand - yes, we have all of those, and more. It seems that four elements underlie research in plasmonic ...
ELECTRO-OPTIC DIFFRACTION GRATING EMPLOYING
... All of the work presented in this thesis was conducted in the Sustainability Solutions Applied Physics Laboratory (SSAP Lab) at the University of British Columbia, Point Grey campus. The work in this thesis was based upon an optical design developed by Lorne Whitehead and John Huizinga1. This thesis ...
... All of the work presented in this thesis was conducted in the Sustainability Solutions Applied Physics Laboratory (SSAP Lab) at the University of British Columbia, Point Grey campus. The work in this thesis was based upon an optical design developed by Lorne Whitehead and John Huizinga1. This thesis ...
Orbital angular momentum: origins
... In 1988, Tamm considered a HeNe laser where the careful positioning of an intracavity absorber could encourage the two modes to frequency lock such that they combined to give a helically phased output of one particular handedness [18]. The system was further refined, in 1990, such that the sense of ...
... In 1988, Tamm considered a HeNe laser where the careful positioning of an intracavity absorber could encourage the two modes to frequency lock such that they combined to give a helically phased output of one particular handedness [18]. The system was further refined, in 1990, such that the sense of ...
Channeling of neutral particles in micro
... with the effective period of the structure equaling l=2. The maximum coefficient of reflection of X-rays from the multilayer interference structure can be attained by partitioning the period between the layers in an optimal way. Obviously, irrespective of how well the layer thicknesses are optimized ...
... with the effective period of the structure equaling l=2. The maximum coefficient of reflection of X-rays from the multilayer interference structure can be attained by partitioning the period between the layers in an optimal way. Obviously, irrespective of how well the layer thicknesses are optimized ...
Construction of a 408 nm Laser System for Use in Ion Interferometry
... The central feature of any interferometer is that there is a travelling wave that is split and sent along two distinct paths. At some later point, the waves from the two paths are recombined. The output of the interferometer depends on the relative phase acquired by the wave as it travels along the ...
... The central feature of any interferometer is that there is a travelling wave that is split and sent along two distinct paths. At some later point, the waves from the two paths are recombined. The output of the interferometer depends on the relative phase acquired by the wave as it travels along the ...
DFB Quantum Cascade Laser Arrays The Harvard community has
... operation at room temperature [3], [4]. QCLs can be grown by metal–organic vapor phase epitaxy (MOVPE) [5] with quality comparable to the best devices grown by molecular beam epitaxy (MBE). Moreover, they can be designed with broadband gain, with full-width at half-maximum (FWHM) of more than 300 cm ...
... operation at room temperature [3], [4]. QCLs can be grown by metal–organic vapor phase epitaxy (MOVPE) [5] with quality comparable to the best devices grown by molecular beam epitaxy (MBE). Moreover, they can be designed with broadband gain, with full-width at half-maximum (FWHM) of more than 300 cm ...
Lab 71 in TFFM08 Fiber Optics
... that could be transmitted would be dependent on the methods used for holding the fiber. Any movement of the fiber would also affect the output of the fiber during its use. To eliminate these problems, the central light carrying portion of the fiber, called the core, is surrounded by a cylindrical re ...
... that could be transmitted would be dependent on the methods used for holding the fiber. Any movement of the fiber would also affect the output of the fiber during its use. To eliminate these problems, the central light carrying portion of the fiber, called the core, is surrounded by a cylindrical re ...
Effect of fluoro-polycarbonates containing aliphatic
... State Key Lab on Integrated Opto-electronics, Jilin University Region, Changchun 130012, People's Republic of China ...
... State Key Lab on Integrated Opto-electronics, Jilin University Region, Changchun 130012, People's Republic of China ...
Measuring amplitude and phase in optical fields with
... In order to get sub-wavelength resolution in optical fields, it is crucial to probe high spatial frequencies contained in evanescent waves. To access the evanescent waves, a probe has to be brought close to the surface. “Close” or “near” means smaller than a wavelength (in contrast to “far”) because ...
... In order to get sub-wavelength resolution in optical fields, it is crucial to probe high spatial frequencies contained in evanescent waves. To access the evanescent waves, a probe has to be brought close to the surface. “Close” or “near” means smaller than a wavelength (in contrast to “far”) because ...
Gaussian Beam Optics [Hecht Ch. 13.1 pages 594
... the M2 factor typically is between 1.1 and 1.3. Collimated TEM00 diode laser beams usually have an M2 ranging from 1.1 to 1.7. For high-energy multimode lasers, the M2 factor can be as high as 25 or 30. In all cases, the M2 factor affects the characteristics of a laser beam and cannot be neglected i ...
... the M2 factor typically is between 1.1 and 1.3. Collimated TEM00 diode laser beams usually have an M2 ranging from 1.1 to 1.7. For high-energy multimode lasers, the M2 factor can be as high as 25 or 30. In all cases, the M2 factor affects the characteristics of a laser beam and cannot be neglected i ...
Quantum Effects in Atomic Nanofabrication Using Light Forces
... (Meschede and Metcalf, 2003). Because the latter method is similar to optical lithography techniques, the nomenclature used in this thesis is such that direct deposition is simply called atomic nanofabrication and the schemes based on resist technique are called atom lithography. ...
... (Meschede and Metcalf, 2003). Because the latter method is similar to optical lithography techniques, the nomenclature used in this thesis is such that direct deposition is simply called atomic nanofabrication and the schemes based on resist technique are called atom lithography. ...
Coupling effect between two adjacent chiral structure layers
... Metamaterials are artificially structured materials that may possess electromagnetic properties not existing in natural materials. Metamaterials can be composed of dielectric elements or structured metallic components. A lot of novel applications can be realized by using metamaterials, e.g., cloakin ...
... Metamaterials are artificially structured materials that may possess electromagnetic properties not existing in natural materials. Metamaterials can be composed of dielectric elements or structured metallic components. A lot of novel applications can be realized by using metamaterials, e.g., cloakin ...
Ray-optics cloaking devices for large objects in incoherent natural light
... hide objects roughly one wavelength large (an optical wavelength equates to the scale of single-celled organisms) have been experimentally demonstrated in both the microwave4,7,10 and optical spectrum8,9,11. Successful attempts have also been made to allow the cloaking technology to be used at much ...
... hide objects roughly one wavelength large (an optical wavelength equates to the scale of single-celled organisms) have been experimentally demonstrated in both the microwave4,7,10 and optical spectrum8,9,11. Successful attempts have also been made to allow the cloaking technology to be used at much ...
MEMS Corner Cube Retroreflectors for Free-Space
... performance of an ideal CCR as well as one with non-ideal characteristics. This allows the designer to determine specifications for the CCRs in order to meet the system requirements. This paper also presents the design issues relevant to fabricating CCRs in the commercial MCNC MUMPS process. The des ...
... performance of an ideal CCR as well as one with non-ideal characteristics. This allows the designer to determine specifications for the CCRs in order to meet the system requirements. This paper also presents the design issues relevant to fabricating CCRs in the commercial MCNC MUMPS process. The des ...
Anti-reflective coating
An antireflective or anti-reflection (AR) coating is a type of optical coating applied to the surface of lenses and other optical elements to reduce reflection. In typical imaging systems, this improves the efficiency since less light is lost. In complex systems such as a telescope, the reduction in reflections also improves the contrast of the image by elimination of stray light. This is especially important in planetary astronomy. In other applications, the primary benefit is the elimination of the reflection itself, such as a coating on eyeglass lenses that makes the eyes of the wearer more visible to others, or a coating to reduce the glint from a covert viewer's binoculars or telescopic sight.Many coatings consist of transparent thin film structures with alternating layers of contrasting refractive index. Layer thicknesses are chosen to produce destructive interference in the beams reflected from the interfaces, and constructive interference in the corresponding transmitted beams. This makes the structure's performance change with wavelength and incident angle, so that color effects often appear at oblique angles. A wavelength range must be specified when designing or ordering such coatings, but good performance can often be achieved for a relatively wide range of frequencies: usually a choice of IR, visible, or UV is offered.