Interferometric lithography with an amplitude division interferometer and a desktop
... part of the wavefront, the ADI has significant advantages as compared with the wavefront division Lloyd’s mirror configuration. First, with the ADI it is possible to print larger areas due to its relaxed spatial coherence requirements. This represents an important advantage, in particular when the i ...
... part of the wavefront, the ADI has significant advantages as compared with the wavefront division Lloyd’s mirror configuration. First, with the ADI it is possible to print larger areas due to its relaxed spatial coherence requirements. This represents an important advantage, in particular when the i ...
Surface Plasmon Interference Nanolithography
... interference fringes are formed. The periodicity d of the interference fringes are half of the surface plasmon wavelength; i.e., d ) λsp/2 ) λ0k0/2ksp. Therefore, in comparison with direct laser interference lithography (LIL),18-20 the resolution of SPIN is enhanced by a factor of ksp/k0. Two parall ...
... interference fringes are formed. The periodicity d of the interference fringes are half of the surface plasmon wavelength; i.e., d ) λsp/2 ) λ0k0/2ksp. Therefore, in comparison with direct laser interference lithography (LIL),18-20 the resolution of SPIN is enhanced by a factor of ksp/k0. Two parall ...
Class07
... What have we learned? • Any traveling sinusoidal wave may be described by y = ym sin(kx wt + f) • Light always reflects with an angle of reflection equal to the angle of incidence (angles are measured to the normal). • When light travels into a denser medium from a rarer medium, it slows down and ...
... What have we learned? • Any traveling sinusoidal wave may be described by y = ym sin(kx wt + f) • Light always reflects with an angle of reflection equal to the angle of incidence (angles are measured to the normal). • When light travels into a denser medium from a rarer medium, it slows down and ...
Lecture 1. Introduction. Nature of light, geometric optics.
... light from an object must either be different in intensity or color (= wavelength) from the background light: Both used in light and fluorescence microscopy ...
... light from an object must either be different in intensity or color (= wavelength) from the background light: Both used in light and fluorescence microscopy ...
PHYSICS CHAPTER 15 NOTES DIFFRACTION AND
... incident light ray as a fixed boundary much like the rope inverting when fixed at the wall. b. The wave that is refracted and transmitted through the thin film is just bent towards the normal. When the refracted ray comes to the second boundary if the medium beyond this boundary has a high index of ...
... incident light ray as a fixed boundary much like the rope inverting when fixed at the wall. b. The wave that is refracted and transmitted through the thin film is just bent towards the normal. When the refracted ray comes to the second boundary if the medium beyond this boundary has a high index of ...
................................................................. Wave–particle duality of C molecules
... photon decoherence. Also, the scattering rates are far too small to induce sufficient phase diffusion. This explains the decoupling of internal and external degrees of freedom, and the persistence of interference in our present experiment. A variety of unusual decoherence experiments would be possib ...
... photon decoherence. Also, the scattering rates are far too small to induce sufficient phase diffusion. This explains the decoupling of internal and external degrees of freedom, and the persistence of interference in our present experiment. A variety of unusual decoherence experiments would be possib ...
File
... Non-reflective coating Good quality lenses in a camera reflect very little light and appear dark or slightly purple. A thin coating of a fluoride salt such as magnesium fluoride on the surface of the lens allows the majority of the light falling on the lens to pass through. The refractive index, n, ...
... Non-reflective coating Good quality lenses in a camera reflect very little light and appear dark or slightly purple. A thin coating of a fluoride salt such as magnesium fluoride on the surface of the lens allows the majority of the light falling on the lens to pass through. The refractive index, n, ...
Silicon-on-Insulator Grating Duplexer for Fiber-to-the
... power diffracted upwards by the grating to the total diffracted power when excited from the SOI waveguide) for the 1310nm wavelength channel and the 1490nm wavelength channel. This led to an optimal grating overlay thickness of 140nm and a grating duty cycle (defined as the ratio of the slit width t ...
... power diffracted upwards by the grating to the total diffracted power when excited from the SOI waveguide) for the 1310nm wavelength channel and the 1490nm wavelength channel. This led to an optimal grating overlay thickness of 140nm and a grating duty cycle (defined as the ratio of the slit width t ...
Wave optics
... The top drawing was used to determine the angles at which dark fringes occur, since any two waves #1 and #2 which originate from positions a/2 apart in the slit are out of phase by /2. ...
... The top drawing was used to determine the angles at which dark fringes occur, since any two waves #1 and #2 which originate from positions a/2 apart in the slit are out of phase by /2. ...
PH4035 - Principles of Optics
... describe the polarization properties of light with different theoretical concepts and understand most polarization phenomena understand the physics at interfaces of different refractive index; in particular for designing multilayer systems. calculate the resolving power of a device in order to resol ...
... describe the polarization properties of light with different theoretical concepts and understand most polarization phenomena understand the physics at interfaces of different refractive index; in particular for designing multilayer systems. calculate the resolving power of a device in order to resol ...
MSc Phy Int
... spectra. Correction of finite mass of the nucleus. Bohr's correspondence, Principle; Quntisation of angular momentum, Zeeman Effect, Raman Effect, Stark effect. Module -II Properties of atomic nucleus (mass, charge, spin, magnetic moment) mass defect, binding energy, packingfraction, elementary idea ...
... spectra. Correction of finite mass of the nucleus. Bohr's correspondence, Principle; Quntisation of angular momentum, Zeeman Effect, Raman Effect, Stark effect. Module -II Properties of atomic nucleus (mass, charge, spin, magnetic moment) mass defect, binding energy, packingfraction, elementary idea ...
3 The concept of diffraction limit
... becomes less of a deterrent and this constitutes the near-field optics. For evanescent waves, the amplitudes decay rapidly at least in one of the spacial dimensions, thereby making the respective propagation constant complex in general. Thus the propagation constants in the transverse directions, be ...
... becomes less of a deterrent and this constitutes the near-field optics. For evanescent waves, the amplitudes decay rapidly at least in one of the spacial dimensions, thereby making the respective propagation constant complex in general. Thus the propagation constants in the transverse directions, be ...
here - UMD Physics
... 6.) You are hired by a scuba diving company to monitor the oxygen content in scuba tanks, fixing it at 20% O2 and 80% N2. Describe an optical method to determine the gas content. Be quantitative – give numbers to show that the technique is viable. Draw diagrams if needed. The index of refraction of ...
... 6.) You are hired by a scuba diving company to monitor the oxygen content in scuba tanks, fixing it at 20% O2 and 80% N2. Describe an optical method to determine the gas content. Be quantitative – give numbers to show that the technique is viable. Draw diagrams if needed. The index of refraction of ...
Chem 115 - Waves, Radiation and Spectroscopy (lecture 16) 3/31
... Photoelectric effect is an example of a property of light that can be explained only by particle behavior Photons are particles of light. Diffraction is an example of a property of light that can only be explained only by wave behavior We observed how diffraction gratings work. m=0 peak is directly ...
... Photoelectric effect is an example of a property of light that can be explained only by particle behavior Photons are particles of light. Diffraction is an example of a property of light that can only be explained only by wave behavior We observed how diffraction gratings work. m=0 peak is directly ...
X-ray Diffraction
... Single crystal diffraction is another type of diffraction which uses large single crystals to obtain diffraction data. Diffraction occurs exactly the same way as it does in powders, but because single crystals are used, the orientation of the crystal must always be known. In addition, area CCD area ...
... Single crystal diffraction is another type of diffraction which uses large single crystals to obtain diffraction data. Diffraction occurs exactly the same way as it does in powders, but because single crystals are used, the orientation of the crystal must always be known. In addition, area CCD area ...
Teaching program
... teachers struggle to cover the prescribed content and to allow time for revision and exam preparation. The available time is often not enough to provide a practical approach. With the current VCE model, there are a number of alternative teaching programs that you can adopt to overcome these practica ...
... teachers struggle to cover the prescribed content and to allow time for revision and exam preparation. The available time is often not enough to provide a practical approach. With the current VCE model, there are a number of alternative teaching programs that you can adopt to overcome these practica ...
moiré technique
... image plane. t1 then of course has to be scaled according to the image magnification. The resulting intensity becomes proportional to t1 · t2. 4. Image the reference grating given by t1 onto a photographic film and thereafter image the model grating given by t2 after deformation onto another film. T ...
... image plane. t1 then of course has to be scaled according to the image magnification. The resulting intensity becomes proportional to t1 · t2. 4. Image the reference grating given by t1 onto a photographic film and thereafter image the model grating given by t2 after deformation onto another film. T ...
of optical-fiber dispersion
... to enhance its photosensitive response.3 The gratings are chirped in the sense that the optical pitch (i.e., effective refractive index neff X grating pitch A) varies linearly along the length of the structure. Our Bragg grating devices were designed to compensate, within an optical bandwidth approx ...
... to enhance its photosensitive response.3 The gratings are chirped in the sense that the optical pitch (i.e., effective refractive index neff X grating pitch A) varies linearly along the length of the structure. Our Bragg grating devices were designed to compensate, within an optical bandwidth approx ...
nλ = dsinθ
... 1. Set the meter sticks on the end table at the base of the lamp. Be sure the two are exactly perpendicular to each other and that the stick is balanced at its 50 cm mark. 2. Put the grating on its support and place it on the optical bench so that it is about 100 cm from the mercury discharge tube. ...
... 1. Set the meter sticks on the end table at the base of the lamp. Be sure the two are exactly perpendicular to each other and that the stick is balanced at its 50 cm mark. 2. Put the grating on its support and place it on the optical bench so that it is about 100 cm from the mercury discharge tube. ...
Lecture 6: Waves Review and Examples PLEASE REVIEW ON
... The positions of the principal maxima occur at φ = 0, ±2π, ±4π, ... where φ is the phase between adjacent slits. θ = 0, ±λ/d, ±2λ/d, ... The intensity at the peak of a principal maximum goes as N2. 3 slits: Atot = 3A1 ⇒ Itot = 9I1. N slits: IN = N2I1. Between two principal maxima there are N-1 zeros ...
... The positions of the principal maxima occur at φ = 0, ±2π, ±4π, ... where φ is the phase between adjacent slits. θ = 0, ±λ/d, ±2λ/d, ... The intensity at the peak of a principal maximum goes as N2. 3 slits: Atot = 3A1 ⇒ Itot = 9I1. N slits: IN = N2I1. Between two principal maxima there are N-1 zeros ...
HP unit 12 - wave optics student handout
... slit towards a screen. Note that rays aren’t parallel. If we look at ray 5 (just below edge of slit) and ray 3 (center of slit), ...
... slit towards a screen. Note that rays aren’t parallel. If we look at ray 5 (just below edge of slit) and ray 3 (center of slit), ...
Experimental demonstration of a narrowband, angular tolerant
... Resonant grating filters are becoming increasingly attractive devices for narrowband filtering in free space. Composed of only a few waveguiding layers and a periodically textured interface, they permit one to reach experimentally a 0.1 nm bandpass [1]. The phenomenon underlying the resonant grating ...
... Resonant grating filters are becoming increasingly attractive devices for narrowband filtering in free space. Composed of only a few waveguiding layers and a periodically textured interface, they permit one to reach experimentally a 0.1 nm bandpass [1]. The phenomenon underlying the resonant grating ...
PDF
... Light changes speed when going from one medium into another (e.g. air to glass) If it hits the surface at an angle it will bend. What is this known as? A ...
... Light changes speed when going from one medium into another (e.g. air to glass) If it hits the surface at an angle it will bend. What is this known as? A ...
Measuring amplitude and phase of light emerging from
... effective numerical aperture and the best resolution for this experimental arrangement. Close to the grating, in the socalled Fresnel diffraction regime, interference of diffracted beams forms periodic features in the axial direction as shown in Figs. 6(a) and 6(b). These patterns are directly assoc ...
... effective numerical aperture and the best resolution for this experimental arrangement. Close to the grating, in the socalled Fresnel diffraction regime, interference of diffracted beams forms periodic features in the axial direction as shown in Figs. 6(a) and 6(b). These patterns are directly assoc ...
Lecture notes lecture 11 (diffraction)
... and r2 is λ/2, the two rays will be out of phase when they reach P1 on the screen, resulting in destructive interference at P1. The path length difference is the distance from the starting point of r2 at the center of the slit to point b. For D>>a, the path length difference between rays r1 and r2 i ...
... and r2 is λ/2, the two rays will be out of phase when they reach P1 on the screen, resulting in destructive interference at P1. The path length difference is the distance from the starting point of r2 at the center of the slit to point b. For D>>a, the path length difference between rays r1 and r2 i ...
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.