Results 71 to 80 of about 909,763 (253)
TWO-MIRROR OBJECTIVE WITH PLANE FIELD
Наука и техника, 2006 The paper considers a light-strong anastigmat with plane field that consists of two aspherical mirrors. Calculation of design parameters is given in the paper.
N. K. Artioukhina, A. V. Bogatko
doaj +1 more source
Journal of Raman Spectroscopy, EarlyView.We apply a sharp silicon tip, typically used for atomic force microscopy (AFM), as a nanoscale probe, and collect frequency‐shifted photons resulting from Raman scattering within the sharp tip. This approach allows us to map local electromagnetic fields in various plasmonic structures and study field “hotspots” with nanometer spatial resolution ...
Zhi Gao, Alexei V. Sokolov
wiley +1 more source
The Astrophysical JournalAccurate age and mass determinations for young pre-main-sequence stars are made challenging by the presence of large-scale starspots. We present results from a near-infrared spectroscopic survey of 10 T-Tauri Stars in Taurus-Auriga that characterize spot-
Facundo Pérez Paolino +3 more
doaj +1 more source
Tunable Terahertz Generation in Dispersion‐Engineered ZnTe Waveguides
Laser &Photonics Reviews, EarlyView.A dispersion‐engineered Zinc Telluride (ZnTe) slab waveguide platform enables tunable and efficient guided‐wave terahertz (THz) generation through modal phase matching. By tailoring the optical and THz modal dispersion, coherent THz emission is achieved across 0.1–3 THz.
Arun Jana +5 more
wiley +1 more source
Cool Cosmos: Infrared Astronomy Tutorial
, 2009 This Web site includes the following sections: Discovery of Infrared; What is Infrared?; Infrared Astronomy; Atmospheric Windows; Near, Mid & Far Infrared; IR Astronomy Timeline; Background & Technology; The Infrared Universe; Infrared Spectroscopy; News
NASA IPAC/CALTECH
core
The Astrophysical JournalInfrared-luminous galaxies are important sites of stellar and black hole mass assembly at most redshifts. Their luminosities are often estimated by fitting spectral energy distribution (SED) models to near- to far-infrared data, but the dependence of ...
Duncan Farrah +25 more
doaj +1 more source
Laser &Photonics Reviews, EarlyView.Chip‐based frequency combs are usually pumped from telecom wavelengths, far from the visible. This work instead pumps close to the visible with a Ti:sapphire laser ‐ the source behind the original optical frequency combs and now becoming chip‐integrable‐ and lets silicon‐nitride waveguides convert it into efficient, octave‐spanning visible‐to‐infrared ...
Abdullah Alabbadi +5 more
wiley +1 more source
An H2O maser in the infrared source IRAS 20126+4104 [PDF]
, 2007 Results of monitoring of H2O maser in the infrared source IRAS 20126+4104, which is associated with a cool molecular cloud, are presented. The observations were carried out on the 22-meter radio telescope of the Pushchino Radio Astronomy Observatory ...
EVGUENI LEKHT EVGUENIEVICH
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Reconfigurable Geometric Phase Matching by Multilayered Nonlinear Thin‐Film Crystals
Laser &Photonics Reviews, EarlyView.The concept of geometric phase matching is demonstrated as a dynamically reconfigurable approach for tunable nonlinear wave mixing in multilayered nonlinear thin‐film crystals. Experimental results reveal full modulation in a bilayer structure and near‐perfect spin‐selective phase matching of second‐harmonic generation in an eight‐layer configuration ...
Danielle Ben‐Haim +3 more
wiley +1 more source
, 1991 The decade of 1990's presents an opportunity to address fundamental astrophysical issues through observations at IR wavelengths made possible by technological and scientific advances during the last decade.
Gillett, Frederick +9 more
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