Optical and acoustic beam shaping for imaging and
... Figure 6-14 Balance reading variation with time during a single sonication ...
... Figure 6-14 Balance reading variation with time during a single sonication ...
Influence of structural disorder on Raman scattering in amorphous
... The intensity of Raman scattering is sensitive to the degree of the structural disorder in solids, so this method can be used to measure relative fractions of the amorphous and the crystalline phases. However, there are problems in accurate estimation of such a fraction using experimental Raman spec ...
... The intensity of Raman scattering is sensitive to the degree of the structural disorder in solids, so this method can be used to measure relative fractions of the amorphous and the crystalline phases. However, there are problems in accurate estimation of such a fraction using experimental Raman spec ...
Numerical Analysis of Relative Phase and Amplitude at the
... signal is spread at different rates. This effect affect the expansion and distortion of signals. In addition, there are various nonlinear effects that also contribute to the impulses distortion during propagation (damping impulses). This distortion is not a major problem at small distances, but the ...
... signal is spread at different rates. This effect affect the expansion and distortion of signals. In addition, there are various nonlinear effects that also contribute to the impulses distortion during propagation (damping impulses). This distortion is not a major problem at small distances, but the ...
An Injection-Locked 674 nm Laser for Strontium-88
... qubits tend to be highly sensitive to their environment and require bulky, expensive equipment to maintain just a few qubits. The dream for quantum information processing technology is the invention of the analogue of the transistor: a cheap, reliable, scalable device which can store and manipulate ...
... qubits tend to be highly sensitive to their environment and require bulky, expensive equipment to maintain just a few qubits. The dream for quantum information processing technology is the invention of the analogue of the transistor: a cheap, reliable, scalable device which can store and manipulate ...
Composite optical vortices - RIT Center for Imaging Science
... Being a topological phase structure, an optical vortex is readily affected when it is combined with other fields. The new or ‘‘composite vortex’’ may be repositioned in space or annihilated, and other vortices may spontaneously form in the net field.13–15 The velocity at which a vortex actually move ...
... Being a topological phase structure, an optical vortex is readily affected when it is combined with other fields. The new or ‘‘composite vortex’’ may be repositioned in space or annihilated, and other vortices may spontaneously form in the net field.13–15 The velocity at which a vortex actually move ...
Orbital angular momentum: origins
... Most scientists realize that light carries a linear momentum equivalent to h̄k0 per photon and, if circularly polarized, a spin angular momentum (SAM) of ±h̄ per photon. In 1992, Allen et al. recognized that light beams with an azimuthal phase dependence of exp(i�φ) carry an orbital angular momentum ...
... Most scientists realize that light carries a linear momentum equivalent to h̄k0 per photon and, if circularly polarized, a spin angular momentum (SAM) of ±h̄ per photon. In 1992, Allen et al. recognized that light beams with an azimuthal phase dependence of exp(i�φ) carry an orbital angular momentum ...
Dependences of the group velocity for
... that can offer large fractional delay and distortion-free propagation are especially attractive. In Ref [6], Gauthier proposed pulse distortion can be avoided by operating in the nonlinear optical regime. By employing this method [7], Mok et al, obtained a slow-light delay time that is about two and ...
... that can offer large fractional delay and distortion-free propagation are especially attractive. In Ref [6], Gauthier proposed pulse distortion can be avoided by operating in the nonlinear optical regime. By employing this method [7], Mok et al, obtained a slow-light delay time that is about two and ...
Optical Properties of Solids
... resonant with the transition frequencies of the atoms in the medium. In this case, the beam will be attenuated as it progresses. The transmission of the medium is clearly related to the absorption, because only unabsorbed light will be transmitted. Selective absorption is responsible for the coloura ...
... resonant with the transition frequencies of the atoms in the medium. In this case, the beam will be attenuated as it progresses. The transmission of the medium is clearly related to the absorption, because only unabsorbed light will be transmitted. Selective absorption is responsible for the coloura ...
Chapter 4 Optical Resonator
... (b) A transparent plate of thickness d, = 2.5 cm and refractive index n = 1.5 is placed inside the resonator and is tilted slightly to prevent light reflected from the plate from reaching the mirrors. Determine the spacing between the resonance frequencies of the resonator. 2. Semiconductor lasers a ...
... (b) A transparent plate of thickness d, = 2.5 cm and refractive index n = 1.5 is placed inside the resonator and is tilted slightly to prevent light reflected from the plate from reaching the mirrors. Determine the spacing between the resonance frequencies of the resonator. 2. Semiconductor lasers a ...
Superposed Strokes Analysis by Conoscopic Holography as aid for
... Among the most spread-counterfeited technique, the simplest and more banal is the trace one. But the more expert counterfeiters use the so-called “Freehand Technique”. This consists of an exercise of reproduction on the more characteristics points of the original document handwriting. The handwritin ...
... Among the most spread-counterfeited technique, the simplest and more banal is the trace one. But the more expert counterfeiters use the so-called “Freehand Technique”. This consists of an exercise of reproduction on the more characteristics points of the original document handwriting. The handwritin ...
Rate equation model of bulk optical damage of silica - AS
... silica at 1064 nm for 8 ns and 14 ps pulses. The 8 ns pulse is single longitudinal mode from a Q-switched laser, and the 14 ps pulse is from a Q-switched mode-lock laser. The beams in both cases are TEM00 mode, and they are focused to a 7.5 µm spot inside a fused silica window. The pulse-to-pulse en ...
... silica at 1064 nm for 8 ns and 14 ps pulses. The 8 ns pulse is single longitudinal mode from a Q-switched laser, and the 14 ps pulse is from a Q-switched mode-lock laser. The beams in both cases are TEM00 mode, and they are focused to a 7.5 µm spot inside a fused silica window. The pulse-to-pulse en ...
Technical Digest Post-Deadline Papers
... We used the general grating equation to show that the light diffracted by on-axis grating into the higher orders other than the 0-order cannot return to the focusing lens; if the pitch of the grating is shorten, this light may go beside the lens. The maximum pitches of the gratings in the air and a ...
... We used the general grating equation to show that the light diffracted by on-axis grating into the higher orders other than the 0-order cannot return to the focusing lens; if the pitch of the grating is shorten, this light may go beside the lens. The maximum pitches of the gratings in the air and a ...
Focusing of light through a stratified medium: a practical
... Eq. (13) without approximation on the Fresnel reflection coefficients rs,p given by Eq. (14). The difference is below 1%, which justifies the approximation made by Török and Varga to obtain Eq. (15), and as a consequence also validates the equivalence with the Gibson and Lanni approach we highlighte ...
... Eq. (13) without approximation on the Fresnel reflection coefficients rs,p given by Eq. (14). The difference is below 1%, which justifies the approximation made by Török and Varga to obtain Eq. (15), and as a consequence also validates the equivalence with the Gibson and Lanni approach we highlighte ...
Overview
... -So, the index is a function of wavelength -Therefore, the amount of refraction is different -This effect is called chromatic dispersion ...
... -So, the index is a function of wavelength -Therefore, the amount of refraction is different -This effect is called chromatic dispersion ...
Proximity Detection IR LED and Optical Crosstalk
... light reflected from an object. However, this process is often complicated by introducing glass between the IR LED, which shines invisible light onto the target, and the sensor, which senses the very small amount of light reflected from the target to the sensor. The introduction of glass (or plastic ...
... light reflected from an object. However, this process is often complicated by introducing glass between the IR LED, which shines invisible light onto the target, and the sensor, which senses the very small amount of light reflected from the target to the sensor. The introduction of glass (or plastic ...
Heriot-Watt University Multi-millijoule few-cycle mid
... cycles and a high pulse energy reaching into the multi-millijoule range. Attaining all three of these conditions simultaneously is one of the primary challenges of ultrafast laser technology. The limited gain bandwidth of optical amplifiers triggered the invention of various types of external pulse c ...
... cycles and a high pulse energy reaching into the multi-millijoule range. Attaining all three of these conditions simultaneously is one of the primary challenges of ultrafast laser technology. The limited gain bandwidth of optical amplifiers triggered the invention of various types of external pulse c ...
Three-dimensional photonic bandgap materials
... wavevectors: there are no full gaps. As mentioned before, RI contrast enhances the width of the gaps. If we continuously tune the contrast down to a homogeneous medium with the same average RI the bands evolve to a situation where no gaps are left; the bands cover the whole spectrum. This can be exp ...
... wavevectors: there are no full gaps. As mentioned before, RI contrast enhances the width of the gaps. If we continuously tune the contrast down to a homogeneous medium with the same average RI the bands evolve to a situation where no gaps are left; the bands cover the whole spectrum. This can be exp ...
Preface The history of science is, to a considerable degree, the
... technique, which we now call computational imaging. Although Von Laue’s motivation was not creating a new imaging technique but rather proving the wave nature of X-rays, lauegrams had very soon become the main imaging tool in crystallography. Lauegrams are not conventional images for visual observat ...
... technique, which we now call computational imaging. Although Von Laue’s motivation was not creating a new imaging technique but rather proving the wave nature of X-rays, lauegrams had very soon become the main imaging tool in crystallography. Lauegrams are not conventional images for visual observat ...
Optical tweezers
Optical tweezers (originally called ""single-beam gradient force trap"") are scientific instruments that use a highly focused laser beam to provide an attractive or repulsive force (typically on the order of piconewtons), depending on the refractive index mismatch to physically hold and move microscopic dielectric objects similar to tweezers. Optical tweezers have been particularly successful in studying a variety of biological systems in recent years.