Results 41 to 50 of about 534,558 (401)
Fabricating waveguide Bragg gratings (WBGs) in bulk materials using ultrashort laser pulses
Nanophotonics, 2017 Optical waveguide Bragg gratings (WBGs) can be created in transparent materials using femtosecond laser pulses. The technique is conducted without the need for lithography, ion-beam fabrication methods, or clean room facilities.
Ams Martin +3 more
doaj +1 more source
Demonstration of 3-port grating phase relations [PDF]
Optics Letters 31, 2384 (2006), 2007 We experimentally demonstrate the phase relations of 3-port gratings by investigating 3-port coupled Fabry-Perot cavities. Two different gratings which have the same 1st order diffraction efficiency but differ substantially in their 2nd order diffraction efficiency have been designed and manufactured.
arxiv +1 more source
Efficient photon collection from a nitrogen vacancy center in a circular bullseye grating. [PDF]
Nano letters (Print), 2014 Efficient collection of the broadband fluorescence from the diamond nitrogen vacancy (NV) center is essential for a range of applications in sensing, on-demand single photon generation, and quantum information processing.
Luozhou Li +9 more
semanticscholar +1 more source
Mask pattern transferred transient grating technique for molecular-dynamics study in solutions [PDF]
, 2004 We have developed a mask pattern transferred transient grating (MPT-TG) technique by using metal grating films. Transient thermal grating is generated by an ultraviolet light pattern transfer to nitrobenzene in 2-propanol solution, and the subsequent ...
Okamoto, Koichi +3 more
core +1 more source
Calculation of optical-waveguide grating characteristics using Green's functions and the Dyson's equation [PDF]
Phys. Rev. E 74, 036616 (2006), 2006 We present a method for calculating the transmission spectra, dispersion, and time delay characteristics of optical-waveguide gratings based on Green's functions and Dyson's equation. Starting from the wave equation for transverse electric modes we show that the method can solve exactly both the problems of coupling of counter-propagating waves (Bragg ...
arxiv +1 more source
Perpendicular Grating Coupler Based on a Blazed Antiback-Reflection Structure
Journal of Lightwave Technology, 2017 Silicon photonic grating couplers are demonstrated featuring a perfect vertical coupling and predicted coupling efficiencies of 87% and 78% with an apodized and a standard periodic structure, respectively.
Tatsuhiko Watanabe +4 more
semanticscholar +1 more source
Condensed Matter, 2020 Calculations of the field distribution in the structure of the dielectric substrate/buffer layer/volume phase grating/analyzed medium were performed.
Stefano Bellucci +3 more
doaj +1 more source
Frequency-domain calculation of Smith-Purcell radiation for metallic and dielectric gratings [PDF]
Applied Optics 59, 11146-11155 (2020), 2020 The intensity of Smith-Purcell radiation from metallic and dielectric gratings (silicon, silica) is compared in a frequency-domain simulation. The numerical model is discussed and verified with the Frank-Tamm formula for Cherenkov radiation. For 30 keV electrons, rectangular dielectric gratings are less efficient than their metallic counterpart, by an ...
arxiv +1 more source
The Dioptrics of Gratings [PDF]
Proceedings of the London Mathematical Society, 1892 n ...
openaire +3 more sources