Sentences with phrase «second harmonic»

The factors in the regression are then: the primary cycle cos (x) and sin (x), first harmonic cos (2x) and sin (2x), second harmonic cos (3x) and sin (3x), etc..

Ultrafast and surface specific optical experiments including vibrational sum frequency generation and second harmonic generation.

The magnetostriction - polarization coupling in Mn2MnWO6 is evidenced by second harmonic generation effect, and corroborated by magnetic - field - dependent...

They started with the experimental set up traditionally used for second harmonic generation studies in Geiger's group, which included a femtosecond laser oscillator from Newport Spectra Physics, optical lenses and mirrors, and a flow cell produced in - house for housing the alpha - quartz / water interface.

This light is then beamed into a second crystal of KTP (potassium titanyl phosphate) which has a non-linear optical characteristic and generates a second harmonic of the input frequency at 0.5 micrometres.

Second harmonic light is a nonlinear optical property in which photons with the same frequency interact with a nonlinear material to produce new photons at twice the energy and half the wavelength of the originals.

It was the discovery of optical second harmonic generation in 1961 that started modern nonlinear optics.

«From the linear properties, one calculates the nonlinear polarization and the mode of the nanostructure at the second harmonic,» says Kevin O'Brien, co-lead author of the Nature Materials paper and a member of Zhang's research group.

The researchers used confocal microscopy to observe the second harmonic generation from metamaterial arrays whose geometry was gradually shifted from a symmetric bar - shape to an asymmetric U-shape.

The blue light is exactly an octave higher than the infrared — the second harmonic.»

In such substances, the material itself generates the new light — a phenomenon known as second harmonic generation.

Seddon and his colleagues have uncovered two new kinds of material that exhibit second harmonic generation.

For second harmonic generation to occur, the molecules of a material must have a so - called dipole moment.

The second type of material that shows second harmonic generation was produced by Seddon and Tony McCaffery at Sussex together with Paul Calvert of the University of Arizona (Nature, vol 344, p 49).

Dragomir Neshev at the Australian National University in Canberra and his colleagues have shown that the nanocrystals can emit the absorbed infrared energy within the visible spectrum — a property called second harmonic generation.

They also demonstrated that the probe could acquire separate coherent anti-stokes Raman scattering, second harmonic generation and two - photon excited autofluorescence images of healthy human skin tissue samples with a resolution of 2048 by 2048 pixels for a scanned area of 300 by 300 microns.

Echography with microbubbles uses the fact that the bubbles will vibrate in the blood at the same frequency as the sound produced by the echoscanner, as well as at twice that frequency; the so - called second harmonic.

They saw that the second harmonic was a little delayed by the gas bubbles.

Not exact matches

One of the most important of these tensions is harmonic tension and resolution, easily demonstrated in a chord pattern in which the first chord is expected to resolve on to the second; things can not be left hanging on that first chord.

Lemons are the stripes to my solids, the harmonic minor seconds to my major scales, the zigs to my zags.

The material is a «second — harmonic generator», which means it halves the wavelength of light that passes through it.

The new polymer retains this ability for more than a year, whereas one - dimensional polymers which are second - harmonic generators lose this property after only a few hours.

Self - referencing is carried out in practice by passing some of the laser light through a so - called second - harmonic generation crystal, which doubles the light's frequency.

Collective Effects in Second - Harmonic Generation from Plasmonic Oligomers, Nano Letters (2018).

During his visit, he examined the signal and photodamage (PD) of second - harmonic generation (SHG) imaging of cultured Aplysia neurons loaded with a voltage sensitive dye.

In the course of his PhD work he developed a multi-spot multi-photon microscope and a second - harmonic generation microscope.

His most important contributions include theory of high harmonic generation by low frequency laser fields and atto - second physics, quantum optics of dielectric media, studies of Bose - Einstein condensates and their excitations (solitons, phase fluctuations), theory of entanglement, and more recently studies of strongly correlated many body atomic and quantum optical systems.

Consisting of a pair of chain - driven counter-rotating shafts located in the oil pan, the balancing system helps quell the inherent second - order harmonic vibrations that normally impact inline 4 - cylinder engines.

B - Pillar: Automotive parlance for the second pillar supporting the roof, usually in the middle between the two doors Balancer shaft: An attempt to provide better harmonic balance to engines with configurations that are not naturally balanced.

[*]» What's interesting (to me if not to you) is that almost all of SAW seems to consist not merely of random sine waves but of the second and third harmonics of a sawtooth.

I recognized these as the second and third harmonics of a sawtooth.

Dr. Pratt would have done far better service to the climate science if he pursued the idea from his initial draft: The second and third harmonics dominate, are largely untouched by the filtering, and can be associated with ocean oscillations of respective periods 83 and 55 years per our fit (75 and 50 years when fitted with HADCRUT3).

http://fallmeeting.agu.org/2012/eposters/eposter/gc23c-1085/ «The second and third harmonics correlate well with the principal ocean oscillations, e.g. AMO;»

The case with the least computational complexity, treated explicitly for illustration in his thesis, is precisely the case we have here of having the second and third harmonics present in full strength («full» in this case meaning for a sawtooth) and no fundamental at all.

What's interesting (to me if not to you) is that almost all of SAW seems to consist not merely of random sine waves but of the second and third harmonics of a sawtooth.

One would expect a more dominate second or third harmonic signature, but the 4.3 ka presence and lack of a pure 8.2 ka is a puzzle since obliquity should be more dominate than precession.

In other words, is it possible that the finding of the «second and third» harmonics in SAW wasn't something interesting that just happened to emerge from the calculations [*], but was, intentionally or unintentionally, an objective of the optimisation process?

2.78 cos (2πt − θ1) +0.8 cos (4πt − θ2) The second term is the harmonic.