Understanding the concept of resolving power in the Fabry–Perot
... As we have explained before, the intensity pattern is a function of the wavelength. Each wavelength coming from a light source generates a set of light circles. The resolving power is a measure of the ability to discriminate between sets of circles generated by different wavelengths. Moreover, it is ...
... As we have explained before, the intensity pattern is a function of the wavelength. Each wavelength coming from a light source generates a set of light circles. The resolving power is a measure of the ability to discriminate between sets of circles generated by different wavelengths. Moreover, it is ...
Star Testing Your Telescope - Backyard Astronomer`s Guide
... diffraction rings look brighter than in perfect optics. 2. On-Axis Astigmatism If the lens or mirror is ground so that it is not rotationally symmetrical, the result is an extra-focal diffraction disk that might appear elliptical. Its axis flips 90° from one side of focus to the other. In focus, sta ...
... diffraction rings look brighter than in perfect optics. 2. On-Axis Astigmatism If the lens or mirror is ground so that it is not rotationally symmetrical, the result is an extra-focal diffraction disk that might appear elliptical. Its axis flips 90° from one side of focus to the other. In focus, sta ...
Quasi Phase Matching Devices for Optical
... Quasi phase matching (QPM) is a method for achieving efficient energy transfer between interacting waves in a nonlinear process. It is most efficient and practical form of this technique is based on a spatial modulation of the nonlinear properties along the interaction path in the material. Such a s ...
... Quasi phase matching (QPM) is a method for achieving efficient energy transfer between interacting waves in a nonlinear process. It is most efficient and practical form of this technique is based on a spatial modulation of the nonlinear properties along the interaction path in the material. Such a s ...
Sun et al., Nature 493, 195 (2013).
... and aligned in phase to produce a sophisticated radiation pattern, the MIT logo, in the far field. To our knowledge, this demonstration represents the largest coherent combination of nanophotonic elements so far. It also shows that despite the short optical wavelength and corresponding length of the ...
... and aligned in phase to produce a sophisticated radiation pattern, the MIT logo, in the far field. To our knowledge, this demonstration represents the largest coherent combination of nanophotonic elements so far. It also shows that despite the short optical wavelength and corresponding length of the ...
Controlling the Phase and Amplitude of Plasmon Sources at a Subwavelength Scale
... the width is smaller than WR for λ0 ) 1530 nm, the GP wavelength (λGP) depends strongly on the gap width, as can be see by the steep portion of the GP dispersion relation (inset of Figure 2b). In this steep region, the phase swings quickly from a minimum value (limited by the Q-factor) to zero and t ...
... the width is smaller than WR for λ0 ) 1530 nm, the GP wavelength (λGP) depends strongly on the gap width, as can be see by the steep portion of the GP dispersion relation (inset of Figure 2b). In this steep region, the phase swings quickly from a minimum value (limited by the Q-factor) to zero and t ...
How can I tell what the polarization axis is for a linear polarizer? The
... What does the wavelength designation mean for quartz retarders and how does this relate to the film specifications? To achieve the phase shift designated for any given retarder, the optical thickness of the material is selected to give the desired shift at a specific wavelength. Retarders are very w ...
... What does the wavelength designation mean for quartz retarders and how does this relate to the film specifications? To achieve the phase shift designated for any given retarder, the optical thickness of the material is selected to give the desired shift at a specific wavelength. Retarders are very w ...
Dispersion Compensation using a Prism-pair
... The generation of ultrashort pulses [1, 2] revolutionized the field of molecular spectroscopy [3]. Not only that ultrashort pulses enable to observe molecular motion in time [4, 5, 6], but they allow also to manipulate their dynamics [7, 8, 9] by controlling the spectral properties of the pulses. Fo ...
... The generation of ultrashort pulses [1, 2] revolutionized the field of molecular spectroscopy [3]. Not only that ultrashort pulses enable to observe molecular motion in time [4, 5, 6], but they allow also to manipulate their dynamics [7, 8, 9] by controlling the spectral properties of the pulses. Fo ...
DETECTION OF SUBWAVELENGTH STRUCTURE PROFILE BY DECOMPOSITION OF MUELLAR MATRIX Yasuhiro Mizutani
... The Mueller matrix for the subwavelength structure was measured by double rotating polarimeter and was calculated using RCWA. Comparing the experimental results with the calculated values demonstrated the effectiveness using Mueller matrix to detect the surface of the subwavelength structure. By dec ...
... The Mueller matrix for the subwavelength structure was measured by double rotating polarimeter and was calculated using RCWA. Comparing the experimental results with the calculated values demonstrated the effectiveness using Mueller matrix to detect the surface of the subwavelength structure. By dec ...
Lecture 10 - KFUPM Faculty List
... the amplification of noise associated with real beams. Such instabilities are inherent to plane wave nonlinear optics. For narrower beams, very stable wave packets whose shape is either invariant on propagation or periodically recurring can form due to the same physics as the instabilities. These ar ...
... the amplification of noise associated with real beams. Such instabilities are inherent to plane wave nonlinear optics. For narrower beams, very stable wave packets whose shape is either invariant on propagation or periodically recurring can form due to the same physics as the instabilities. These ar ...
Photon number resolution using a time-multiplexed single
... are needed for a linear optics approach to quantum computing [1, 2], for example, and they may have other applications as well [3], such as conditional state preparation [4, 5]. Here we describe a simple time-multiplexing technique that allows ordinary single-photon detectors to be used as photon nu ...
... are needed for a linear optics approach to quantum computing [1, 2], for example, and they may have other applications as well [3], such as conditional state preparation [4, 5]. Here we describe a simple time-multiplexing technique that allows ordinary single-photon detectors to be used as photon nu ...
All-dielectric subwavelength metasurface focusing lens
... reduce a laser spot diameter by a factor of about three, which can be very useful for many laser receiver, non-imaging, and optical sensing applications. For a proof-of-concept demonstration, we selected a nano-patterned regular array of pillars etched with near vertical walls over the silicon wafer ...
... reduce a laser spot diameter by a factor of about three, which can be very useful for many laser receiver, non-imaging, and optical sensing applications. For a proof-of-concept demonstration, we selected a nano-patterned regular array of pillars etched with near vertical walls over the silicon wafer ...
CHAPTER 1 PHYSICAL OPTICS: INTERFERENCE • Introduction
... The colors you see in a soap bubble are also due to an interference effect between light rays reflected from the front and back surfaces of the thin film of soap making the bubble. The color depends on the thickness of film, ranging from black, where the film is thinnest, to magenta, where the film ...
... The colors you see in a soap bubble are also due to an interference effect between light rays reflected from the front and back surfaces of the thin film of soap making the bubble. The color depends on the thickness of film, ranging from black, where the film is thinnest, to magenta, where the film ...
Introduction - Atto Second Physics
... amplitude transmittance f(x,y) = exp[i(2π/Λx)x] the wave is modulated by the harmonic function (Fig. III-10), so that the complex amplitude of the wave transmitted is U(x,y,0) = f(x,y). The incident wave is converted into a plane wave with wavevector at θx = sin-1λ/Λx (Fig. III-10) by diffraction (e ...
... amplitude transmittance f(x,y) = exp[i(2π/Λx)x] the wave is modulated by the harmonic function (Fig. III-10), so that the complex amplitude of the wave transmitted is U(x,y,0) = f(x,y). The incident wave is converted into a plane wave with wavevector at θx = sin-1λ/Λx (Fig. III-10) by diffraction (e ...
ELECTRO-OPTIC DIFFRACTION GRATING EMPLOYING
... Electro-optic diffraction modulation was demonstrated by patterning one of the two ITO films into an interdigitated design, done via standard photolithography techniques for initial experimental verification, and via focused ion beam milling for sub-micron scale electrodes. An electrical potential d ...
... Electro-optic diffraction modulation was demonstrated by patterning one of the two ITO films into an interdigitated design, done via standard photolithography techniques for initial experimental verification, and via focused ion beam milling for sub-micron scale electrodes. An electrical potential d ...
Fundamental limit of nanophotonic light trapping in solar cells
... To illustrate this effect, we assume that the film has a high refractive index (for example, silicon), such that the wavelength in the material is small compared with the periodicity. We also assume that the film has a thickness of a few wavelengths. In this case, all modes have approximately the sa ...
... To illustrate this effect, we assume that the film has a high refractive index (for example, silicon), such that the wavelength in the material is small compared with the periodicity. We also assume that the film has a thickness of a few wavelengths. In this case, all modes have approximately the sa ...
ACOUSTO-OPTICS
... angular frequency is therefore w, = ~(1 + 2u, sin e/c>, where u, sin 8 is the component of velocity of these surfaces in the direction of the incident and the reflected waves. Using the relations sin 8 = h/2A, v, = Rfi/2~, and c = ho/27r, (20.1-16) is reproduced. The Doppler shift equals the sound f ...
... angular frequency is therefore w, = ~(1 + 2u, sin e/c>, where u, sin 8 is the component of velocity of these surfaces in the direction of the incident and the reflected waves. Using the relations sin 8 = h/2A, v, = Rfi/2~, and c = ho/27r, (20.1-16) is reproduced. The Doppler shift equals the sound f ...
The Demonstration
... curiously tends to rotate the direction of the polarization of light as it passes through the sugar solution. There is scattering that’s taking place, but the polarization of the beam going through the tank is being rotated as the beam moves along the tank. The scattering is always the strongest whe ...
... curiously tends to rotate the direction of the polarization of light as it passes through the sugar solution. There is scattering that’s taking place, but the polarization of the beam going through the tank is being rotated as the beam moves along the tank. The scattering is always the strongest whe ...
Pixel level optical-transfer-function design based on the surface
... Optical transfer function (OTF) characterizes the response of an imaging system as a function of spatial frequency of the input signal. Modification of OTF (sometimes referred as spatial filtering) is of significant importance for modern imaging and vision system designs. The implementation of spati ...
... Optical transfer function (OTF) characterizes the response of an imaging system as a function of spatial frequency of the input signal. Modification of OTF (sometimes referred as spatial filtering) is of significant importance for modern imaging and vision system designs. The implementation of spati ...
Chapter15 - cloudfront.net
... • Waves must have a constant phase difference for interference to be observed. • Coherence is the correlation between the phases of two or more waves. ...
... • Waves must have a constant phase difference for interference to be observed. • Coherence is the correlation between the phases of two or more waves. ...
polarization 3
... 1. A plane polarized light falling on an optically active medium along its optic axis splits up into two circularly polarized vibrations of equal amplitudes and rotating in opposite directions –one clockwise and other anticlockwise. 2. In an optically inactive substance these two circular components ...
... 1. A plane polarized light falling on an optically active medium along its optic axis splits up into two circularly polarized vibrations of equal amplitudes and rotating in opposite directions –one clockwise and other anticlockwise. 2. In an optically inactive substance these two circular components ...
Shaped ultrafast laser pulses in the deep ultraviolet
... Approximately 700 microjoules of the light is down-collimated into a 250 micron thick BBO crystal cut for second-harmonic generation of the fundamental, producing 175 microjoules of light at 393 nm. Since the group velocity inside the BBO crystal is wavelength dependent, the peak of the second harmo ...
... Approximately 700 microjoules of the light is down-collimated into a 250 micron thick BBO crystal cut for second-harmonic generation of the fundamental, producing 175 microjoules of light at 393 nm. Since the group velocity inside the BBO crystal is wavelength dependent, the peak of the second harmo ...
Nano-optomechanical Actuator and Pull-Back Instability
... low cost. However, the microscale dimensions limit both the speed and precision of actuation. Nanoelectromechanical systems (NEMS) scale down the dimensions.7,8 In particular, NEMS employing electrostatic forces have been developed.9,10 For parallel-plate electrostatic actuators, the pull-in instabi ...
... low cost. However, the microscale dimensions limit both the speed and precision of actuation. Nanoelectromechanical systems (NEMS) scale down the dimensions.7,8 In particular, NEMS employing electrostatic forces have been developed.9,10 For parallel-plate electrostatic actuators, the pull-in instabi ...
Principles of optics
... 1.1.3 Boundary conditions at a surface of discontinuity 1.1.4 The energy law of the electromagnetic ®eld 1.2 The wave equation and the velocity of light 1.3 Scalar waves 1.3.1 Plane waves 1.3.2 Spherical waves 1.3.3 Harmonic waves. The phase velocity 1.3.4 Wave packets. The group velocity 1.4 Vector ...
... 1.1.3 Boundary conditions at a surface of discontinuity 1.1.4 The energy law of the electromagnetic ®eld 1.2 The wave equation and the velocity of light 1.3 Scalar waves 1.3.1 Plane waves 1.3.2 Spherical waves 1.3.3 Harmonic waves. The phase velocity 1.3.4 Wave packets. The group velocity 1.4 Vector ...
Trends in Optical Fiber Sensors - IEEE Bombay Section Symposium
... temperature, etc. • These systems have a poor ability to screen noise, leading to lower precision, but are simple and inexpensive systems. ...
... temperature, etc. • These systems have a poor ability to screen noise, leading to lower precision, but are simple and inexpensive systems. ...
wavelength dependence of the light-induced index
... optical path length and thus the optical phase of light propagating through the irradiated arm. The change in optical phase is readily determined from the experimental data by using the fact that a change in the coupling ratio from 0% to 100% corresponds to an optical phase change of 7r. Thus the me ...
... optical path length and thus the optical phase of light propagating through the irradiated arm. The change in optical phase is readily determined from the experimental data by using the fact that a change in the coupling ratio from 0% to 100% corresponds to an optical phase change of 7r. Thus the me ...
Diffraction grating
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.