Wave-mixing solitons in ferroelectric crystals
... obtained for the description of four wave-mixing in transmission geometry, it describes self-diffraction of the wave from shifted gratings as well. The sine-Gordon equation governs the soliton propagation. • The photoinduced amplitude of the refractive-index grating exhibits also a soliton shape in ...
... obtained for the description of four wave-mixing in transmission geometry, it describes self-diffraction of the wave from shifted gratings as well. The sine-Gordon equation governs the soliton propagation. • The photoinduced amplitude of the refractive-index grating exhibits also a soliton shape in ...
act_science_bellringers
... 26. Suppose that chemical composition is uniform among stars formed from the same cloud of gas and dust, but that chemical composition varies among stars formed from different clouds of gas and dust. Student 2 would most likely agree with which of the following statements comparing the chemical com ...
... 26. Suppose that chemical composition is uniform among stars formed from the same cloud of gas and dust, but that chemical composition varies among stars formed from different clouds of gas and dust. Student 2 would most likely agree with which of the following statements comparing the chemical com ...
Hyperbolic metamaterials and their applications Ferrari , , Dominic Lepage
... anisotropic dispersion, termed hyperbolic. The interaction of these metamaterials with their nearfield results in applications ranging from sub-wavelength light manipulation and imaging to spontaneous and thermal emission modification. The present compendium reviews the conceptual and experimental mil ...
... anisotropic dispersion, termed hyperbolic. The interaction of these metamaterials with their nearfield results in applications ranging from sub-wavelength light manipulation and imaging to spontaneous and thermal emission modification. The present compendium reviews the conceptual and experimental mil ...
Understanding the Cool DA White Dwarf, G29-38
... The DAV (or ZZ Ceti) white dwarfs, with hydrogen-dominated spectra, are the coolest (≈ 13, 000K) and oldest of the four known classes of white dwarf nonradial g-mode pulsators.1 As such, they are the most critical in answering the age question. Unfortunately, they have also proven the most difficult ...
... The DAV (or ZZ Ceti) white dwarfs, with hydrogen-dominated spectra, are the coolest (≈ 13, 000K) and oldest of the four known classes of white dwarf nonradial g-mode pulsators.1 As such, they are the most critical in answering the age question. Unfortunately, they have also proven the most difficult ...
Infrared Spectroscopy of Trapped Gases in Metal
... that are nearly ideal for carbon capture applications. Moreover, they require much less energy than current materials to release the carbon dioxide and be regenerated. Additionally, many different structures can be created fairly easily, so scientists are on the hunt for the ideal carbon-capturing m ...
... that are nearly ideal for carbon capture applications. Moreover, they require much less energy than current materials to release the carbon dioxide and be regenerated. Additionally, many different structures can be created fairly easily, so scientists are on the hunt for the ideal carbon-capturing m ...
- sfo
... With standard optical fiber, at 1550 nm, a chirp-less source is required to achieve bit rates higher than 10 Gb/s. It is expected that fast and chirp-less modulation could be achieved by using a cw laser coupled into an external modulator based on a fast physical effect such as electro-absorption. In ...
... With standard optical fiber, at 1550 nm, a chirp-less source is required to achieve bit rates higher than 10 Gb/s. It is expected that fast and chirp-less modulation could be achieved by using a cw laser coupled into an external modulator based on a fast physical effect such as electro-absorption. In ...
The CCD Photometric Calibration Cookbook
... photographs and latterly CCD images. The techniques for calibrating CCD images are now well established. However, they must be applied carefully if accurate results are to be obtained. In essence, astronomical photometry is concerned with measuring the brightness of celestial objects. CCD (Charge-Co ...
... photographs and latterly CCD images. The techniques for calibrating CCD images are now well established. However, they must be applied carefully if accurate results are to be obtained. In essence, astronomical photometry is concerned with measuring the brightness of celestial objects. CCD (Charge-Co ...
Optimally designed narrowband guided
... characteristics. Indeed, for filter design that must meet stringent performance criteria that include filter bandwidth, out-of-band rejection, and filter efficiency, these considerations become critical for determining whether or not a design is feasible with a set of materials. Without the effects ...
... characteristics. Indeed, for filter design that must meet stringent performance criteria that include filter bandwidth, out-of-band rejection, and filter efficiency, these considerations become critical for determining whether or not a design is feasible with a set of materials. Without the effects ...
Optical Properties of Semiconductor Nanocrystals
... Electronic states and probabilities of optical transitions in molecules and crystals are determined by the properties of atoms and their spatial arrangement. An electron in an atom possesses a discrete set of states, resulting in a corresponding set of narrow absorption and emission lines. Elementar ...
... Electronic states and probabilities of optical transitions in molecules and crystals are determined by the properties of atoms and their spatial arrangement. An electron in an atom possesses a discrete set of states, resulting in a corresponding set of narrow absorption and emission lines. Elementar ...
II. On the Michelson-Morley Experiment relating to the Drift of the
... as that of the incident. Let p1 denote the perpendicular distance of any point P from the wave-front through 0 ^ Then the phase of the first train at P=zp1j\+ phase of incident light at Ox. Similarly if the plate and the second mirror intersect at 0 2 , and p>2 denote the distance of P from the wave ...
... as that of the incident. Let p1 denote the perpendicular distance of any point P from the wave-front through 0 ^ Then the phase of the first train at P=zp1j\+ phase of incident light at Ox. Similarly if the plate and the second mirror intersect at 0 2 , and p>2 denote the distance of P from the wave ...
Optical coherence tomography (OCT): a review
... several studies [9], [12], [26], [27] to measure the locations and reflectivities of tissue layers in a manner analogous to pulseinterpreted as a reflectivity echo ultrasound, with profile analogous to an A-mode ultrasound scan. It follows determines the axial from (9) that the spatial extent of wid ...
... several studies [9], [12], [26], [27] to measure the locations and reflectivities of tissue layers in a manner analogous to pulseinterpreted as a reflectivity echo ultrasound, with profile analogous to an A-mode ultrasound scan. It follows determines the axial from (9) that the spatial extent of wid ...
$doc.title
... Testing the validity of the theoretical model of stochastic excitation with the help of 3D simulations of the outer layers of stellar models is the main goal of the present paper. For that purpose, we compare the p-mode excitation rates for stars with different temperatures and luminosities as obtai ...
... Testing the validity of the theoretical model of stochastic excitation with the help of 3D simulations of the outer layers of stellar models is the main goal of the present paper. For that purpose, we compare the p-mode excitation rates for stars with different temperatures and luminosities as obtai ...
white_paper.word - Space Telescope Science Institute
... NICMOS extends the Hubble Space Telescope's UV/Optical panchromatic vision into the NIR fulfilling a Level-1 requirement of the HST mission. With NIR light we can see into regions, which are obscured at visible and ultra-violet (UV) wavelengths. Dust, which is pervasive and prevalent in many forms t ...
... NICMOS extends the Hubble Space Telescope's UV/Optical panchromatic vision into the NIR fulfilling a Level-1 requirement of the HST mission. With NIR light we can see into regions, which are obscured at visible and ultra-violet (UV) wavelengths. Dust, which is pervasive and prevalent in many forms t ...
on the evolution of anomalous x-ray pulsars and soft gamma
... We show that the period clustering of anomalous X-ray pulsars (AXPs) and soft gamma-ray repeaters (SGRs), their X-ray luminosities, ages, and statistics can be explained with fall back disks with large initial specific angular momentum. The disk evolution models are developed by comparison to self-s ...
... We show that the period clustering of anomalous X-ray pulsars (AXPs) and soft gamma-ray repeaters (SGRs), their X-ray luminosities, ages, and statistics can be explained with fall back disks with large initial specific angular momentum. The disk evolution models are developed by comparison to self-s ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.