![Subwavelength dynamic focusing in plasmonic nanostructures using time reversal * Guy Bartal,](http://s1.studyres.com/store/data/008906288_1-4b0dd5dbb7bedfe6307449973c7dddff-300x300.png)
Subwavelength dynamic focusing in plasmonic nanostructures using time reversal * Guy Bartal,
... spatial frequencies, propagating back with a propagation constant of the same magnitude 共and opposite sign兲. The time-reversed beam intensity at the MDML output is plotted in 关Fig. 3共d兲兴. The intensity full width at half maximum 共FWHM兲 is limited by the width of the dielectric waveguide, to 30 nm. N ...
... spatial frequencies, propagating back with a propagation constant of the same magnitude 共and opposite sign兲. The time-reversed beam intensity at the MDML output is plotted in 关Fig. 3共d兲兴. The intensity full width at half maximum 共FWHM兲 is limited by the width of the dielectric waveguide, to 30 nm. N ...
Aalborg Universitet
... (Supplementary Fig. S2) similar to that observed for V-grooves25,26. It should be noted that these oscillations are pronounced only for relatively long wavelengths ( > 550 nm), because, even though SP modes (and thereby GSPs) propagating along gold-air interfaces do exist for shorter wavelengths (bu ...
... (Supplementary Fig. S2) similar to that observed for V-grooves25,26. It should be noted that these oscillations are pronounced only for relatively long wavelengths ( > 550 nm), because, even though SP modes (and thereby GSPs) propagating along gold-air interfaces do exist for shorter wavelengths (bu ...
Optics - Jnoodle
... where n = the refractive index of the optically more dense medium that the light cannot leave. Note that for water with n = 1.33 we get C = arcsin(1/1.33) 49o. The "underwater bright circle" and reversible rays This was for light "attempting" to leave a medium with n > 1. An example of this would ...
... where n = the refractive index of the optically more dense medium that the light cannot leave. Note that for water with n = 1.33 we get C = arcsin(1/1.33) 49o. The "underwater bright circle" and reversible rays This was for light "attempting" to leave a medium with n > 1. An example of this would ...
Introduction: When waves encounter obstacles (or openings), they
... screen placed in the path of light. AB is the illuminated portion of the screen and above A and below B is the region of the geometrical shadow. Considering MN as the primary wave front. According to Huygen's construction, if secondary wave fronts are drawn, one would expect encroachment of light in ...
... screen placed in the path of light. AB is the illuminated portion of the screen and above A and below B is the region of the geometrical shadow. Considering MN as the primary wave front. According to Huygen's construction, if secondary wave fronts are drawn, one would expect encroachment of light in ...
Summary - Ridgefield School
... – Decide if the small-angle approximation is valid. – Decide if the slit widths for multiple slits are wide enough that you have to consider single-slit diffraction as well as multiple-slit interference. – If useful, represent the situation with a wave front diagram showing the overlapping crests an ...
... – Decide if the small-angle approximation is valid. – Decide if the slit widths for multiple slits are wide enough that you have to consider single-slit diffraction as well as multiple-slit interference. – If useful, represent the situation with a wave front diagram showing the overlapping crests an ...
Experimental method for reliably establishing the refractive index of
... method for reliably characterising the complex refractive indices of each system has largely not been demonstrated. To this end, we initiated this study. In general, when modelling the optics of many-layer systems, one of the principle difficulties comprises overcoming the degeneracy between complex ...
... method for reliably characterising the complex refractive indices of each system has largely not been demonstrated. To this end, we initiated this study. In general, when modelling the optics of many-layer systems, one of the principle difficulties comprises overcoming the degeneracy between complex ...
TEP 2.6.11-00 Fourier optics – 2f Arrangement TEP 2.6.11
... Fourier transform, lenses, Fraunhofer diffraction, index of refraction, Huygens’ principle. ...
... Fourier transform, lenses, Fraunhofer diffraction, index of refraction, Huygens’ principle. ...
Mach Zehnder Interferometer and its Applications
... component according to the optical phase difference between two arms. The change induced in the sensing arm by any of the measurands changes the optical phase difference of the MZI, which can be easily detected by analyzing the variation in the interference signal. ...
... component according to the optical phase difference between two arms. The change induced in the sensing arm by any of the measurands changes the optical phase difference of the MZI, which can be easily detected by analyzing the variation in the interference signal. ...
CH915: Elemental Analysis
... Collimating lens or mirror Dispersion element (prism or grating) Focusing lens or mirror Exit slit ...
... Collimating lens or mirror Dispersion element (prism or grating) Focusing lens or mirror Exit slit ...
Document
... 18- Wave length of longitudinal wave: it is the distance between the centers of any 2 successive compressions or rarefactions 19- Wave length ( λ ) : it is the distance between any 2 successive points having the same phase - it’s the distance covered by the wave in one periodic time 20- Electromagne ...
... 18- Wave length of longitudinal wave: it is the distance between the centers of any 2 successive compressions or rarefactions 19- Wave length ( λ ) : it is the distance between any 2 successive points having the same phase - it’s the distance covered by the wave in one periodic time 20- Electromagne ...
07 Propagation of Waves
... Maxwell’s equations demonstrated that light is a transverse wave (as opposed to longitudinal waves, e.g., sound). Both the E and B vectors are perpendicular to the direction of propagation of the radiation. Even before Maxwell, Thomas Young inferred the transverse character of light in 1817 when he ...
... Maxwell’s equations demonstrated that light is a transverse wave (as opposed to longitudinal waves, e.g., sound). Both the E and B vectors are perpendicular to the direction of propagation of the radiation. Even before Maxwell, Thomas Young inferred the transverse character of light in 1817 when he ...
Chapter 5 : Diffraction and Beam Formation Using arrays
... therefore the radiation pattern is shifted towards the steering angle. However, the radiation pattern from a single transducer element is not shifted. Therefore, 2aw/d sin /d-sin ...
... therefore the radiation pattern is shifted towards the steering angle. However, the radiation pattern from a single transducer element is not shifted. Therefore, 2aw/d sin /d-sin ...
1 L4: Interference L4 INTERFERENCE Objectives Aims When you
... sum (vector sum if the wave property is a vector) of the wave property for the individual waves. The contribution from one wave is just that which would occur if the other waves were not there. In the case of the water waves the appropriate wave property is the linear displacement (change in positio ...
... sum (vector sum if the wave property is a vector) of the wave property for the individual waves. The contribution from one wave is just that which would occur if the other waves were not there. In the case of the water waves the appropriate wave property is the linear displacement (change in positio ...
Appendix B 2Spectral Decomposition of Diffracted Light
... Consider the role of the phase term in Equation B10. From the point of view of a single sample of the fringe (at a single x location), each spectral component of the diffracted light must include a particular (x-independent) phase shift. And for a given hogel, each spectral component needs to includ ...
... Consider the role of the phase term in Equation B10. From the point of view of a single sample of the fringe (at a single x location), each spectral component of the diffracted light must include a particular (x-independent) phase shift. And for a given hogel, each spectral component needs to includ ...
CP1: Investigation into the Feasibility of a Three Axis
... being colourless and transparent [12] and results in the need to use dyes to increase contrast. It is often the case that such features, despite being colourless and transparent, do have varying refractive indexes. This produces the reflections and/or changes in optical path length1 required for int ...
... being colourless and transparent [12] and results in the need to use dyes to increase contrast. It is often the case that such features, despite being colourless and transparent, do have varying refractive indexes. This produces the reflections and/or changes in optical path length1 required for int ...
A simple demonstration of frustrated total internal reflection
... 共5兲–共7兲 and note that n, n2 − 1, and cos 0 are of the order of 1. It is then easy to see that the exponential approximation can be made for d ⲏ / 4. We will be considering this limit, that is, when the coupling between the two high refractive index media is exponential. Also note that, although t ...
... 共5兲–共7兲 and note that n, n2 − 1, and cos 0 are of the order of 1. It is then easy to see that the exponential approximation can be made for d ⲏ / 4. We will be considering this limit, that is, when the coupling between the two high refractive index media is exponential. Also note that, although t ...
Coherence - Studentportalen
... We realize immediately that bending magnet radiation, having a broad wavelength spectrum is not a good candidate for filtering out coherent intensity. Undulator radiation, on the other hand, emits in a narrow bandwidth has a good potential (It is the brilliance that matters). This filtering is done ...
... We realize immediately that bending magnet radiation, having a broad wavelength spectrum is not a good candidate for filtering out coherent intensity. Undulator radiation, on the other hand, emits in a narrow bandwidth has a good potential (It is the brilliance that matters). This filtering is done ...
L4 INTERFERENCE
... (vector sum if the wave property is a vector) of the wave property for the individual waves. The contribution from one wave is just that which would occur if the other waves were not there. In the case of the water waves the appropriate wave property is the linear displacement (change in position) o ...
... (vector sum if the wave property is a vector) of the wave property for the individual waves. The contribution from one wave is just that which would occur if the other waves were not there. In the case of the water waves the appropriate wave property is the linear displacement (change in position) o ...
Barnett
... Two-photon interference - Hong, Ou and Mandel 1987 “Each photon then interferes only with itself. Interference between different photons never occurs” Dirac ...
... Two-photon interference - Hong, Ou and Mandel 1987 “Each photon then interferes only with itself. Interference between different photons never occurs” Dirac ...
Optical response of plasmonic relief meta-surfaces
... If the slot is not rectangular, the situation is more complex. For example, figure 5 shows the reflection spectrum ...
... If the slot is not rectangular, the situation is more complex. For example, figure 5 shows the reflection spectrum ...
Soleil-Babinet Compensator
... A Soleil-Babinet Compensator is a continuously variable zero-order retarder (wave plate) that can be used over a broad spectral range. The variable retardance is achieved by adjusting the position of a long birefringent wedge with respect to a short fixed birefringent wedge. The wedge angle and fast ...
... A Soleil-Babinet Compensator is a continuously variable zero-order retarder (wave plate) that can be used over a broad spectral range. The variable retardance is achieved by adjusting the position of a long birefringent wedge with respect to a short fixed birefringent wedge. The wedge angle and fast ...
Optical fiber sensors
... Optical fiber sensor: A sensor that measures a physical quantity based on its modulation on the intensity, spectrum, phase, or polarization of light traveling through an optical fiber. Advantages of optical fiber sensors Compact size ...
... Optical fiber sensor: A sensor that measures a physical quantity based on its modulation on the intensity, spectrum, phase, or polarization of light traveling through an optical fiber. Advantages of optical fiber sensors Compact size ...
Diffraction Grating Handbook
... “No single tool has contributed more to the progress of modern physics than the diffraction grating …”1 Newport Corporation is proud to build upon the heritage of technical excellence that began when Bausch & Lomb produced its first high-quality master grating in the late 1940s. A high-fidelity repl ...
... “No single tool has contributed more to the progress of modern physics than the diffraction grating …”1 Newport Corporation is proud to build upon the heritage of technical excellence that began when Bausch & Lomb produced its first high-quality master grating in the late 1940s. A high-fidelity repl ...
The Michelson Interferometer
... emits a wave, part of which travels to the right. The beam splitter at O divides the wave into two, one segment travelling to the right and one up into the background. The two waves are reflected by mirrors M1 and M2 and return to the beamsplitter. Part of the wave coming from M2 passes through the ...
... emits a wave, part of which travels to the right. The beam splitter at O divides the wave into two, one segment travelling to the right and one up into the background. The two waves are reflected by mirrors M1 and M2 and return to the beamsplitter. Part of the wave coming from M2 passes through the ...
Diffraction grating
![](https://commons.wikimedia.org/wiki/Special:FilePath/Diffraction_grating.jpg?width=300)
In optics, a diffraction grating is an optical component with a periodic structure, which splits and diffracts light into several beams travelling in different directions. The emerging coloration is a form of structural coloration. The directions of these beams depend on the spacing of the grating and the wavelength of the light so that the grating acts as the dispersive element. Because of this, gratings are commonly used in monochromators and spectrometers.For practical applications, gratings generally have ridges or rulings on their surface rather than dark lines. Such gratings can be either transmissive or reflective. Gratings which modulate the phase rather than the amplitude of the incident light are also produced, frequently using holography.The principles of diffraction gratings were discovered by James Gregory, about a year after Newton's prism experiments, initially with items such as bird feathers. The first man-made diffraction grating was made around 1785 by Philadelphia inventor David Rittenhouse, who strung hairs between two finely threaded screws. This was similar to notable German physicist Joseph von Fraunhofer's wire diffraction grating in 1821.Diffraction can create ""rainbow"" colors when illuminated by a wide spectrum (e.g., continuous) light source. The sparkling effects from the closely spaced narrow tracks on optical storage disks such as CD's or DVDs are an example, while the similar rainbow effects caused by thin layers of oil (or gasoline, etc.) on water are not caused by a grating, but rather by interference effects in reflections from the closely spaced transmissive layers (see Examples, below). A grating has parallel lines, while a CD has a spiral of finely-spaced data tracks. Diffraction colors also appear when one looks at a bright point source through a translucent fine-pitch umbrella-fabric covering. Decorative patterned plastic films based on reflective grating patches are very inexpensive, and are commonplace.