0:00:04their performance
0:00:13the study of the nonlinear applications of surface plus more like tones is a rapidly
0:00:19developing area of research in an of a tonic
0:00:23indeed the sub wavelength confinement of surface plus multiple items enhances enormously or than a
0:00:30linear processes which can be exploited forming at a rise active functionalities like more linear
0:00:37estimators and all optical switching and modulation
0:00:42maxima linearities simplex monte devices can arise from several physical mechanism
0:00:48the most remarkable be in the pond the remote to force the point two confinement
0:00:53in and of size none of particles the plasma pressure gradient in hydrodynamic models and
0:01:00the entire month or more modulation
0:01:02for gold at optical frequencies the into a month or more modulation constitutes the leading
0:01:08only are mechanism
0:01:11we start our analysis from the band structure of gold which is characterized by if
0:01:17a standard cubic
0:01:19the big no side primitive cell is their own bic but the cajun
0:01:25the reciprocal left is the body centered cubic where the video side sprinters cell is
0:01:32a truncated okay he'd written
0:01:34it up to the frequencies the inter band absorption is restaurant run the point x
0:01:39and the l of the people collected which corresponds to the centers of the square
0:01:45and the second all three of the truncated up to he'd written
0:01:50the thought of dialects acceptability is given by the sum of inter band and inter
0:01:55band contributions
0:01:57only inter band transitions from the balance band to state and the conduction band with
0:02:03the energy higher than the for me energy are allowed
0:02:06for this reason the inter bound absorption is highly dependent on the temperature of the
0:02:11laptop last month for the families matting of the conduction attitude
0:02:16the imagery part of the inter band dielectric constant can be calculated by following a
0:02:23semi classical approach
0:02:25after onto primes depends on the electron temperature for the function g a which is
0:02:31called joint density of state
0:02:35the real part of the into bound dialect a constant can be then calculated through
0:02:40the comments colleague relation
0:02:43hence the compass correction to the dielectric constant depends on that amplitude variation of the
0:02:50electron plus model which inherently depends on the pulse optical power
0:02:56the temporal dynamics of the electron plus model can be described in terms of the
0:03:02two temperature model
0:03:04the result of this analysis reveals that the increase of temperature of the electron plus
0:03:10model is given by a composition of the observed power and the cropped realistic response
0:03:15function analogously to the rime effect
0:03:19the typical response time is of your their of five hundred from to seconds much
0:03:25longer than the rahmen response time
0:03:28the have we have studied the effect of the thermal modulation of polarization on the
0:03:34surface plus multiple articles propagating along the goal and then a wire surrounded by c
0:03:39look at less
0:03:42we have focused their attention on the fundamental mode and the long range product and
0:03:46mode
0:03:48the fundamental mode is cylindrical e symmetric and the left a magnetic field is tightly
0:03:54bound across than unaware survey
0:03:57the high confinement if accompanied by considerable loss and the topic of frequencies the fundamental
0:04:04surface plus more polarity and typically propagates only few microns
0:04:09the pointing vector of the long range plan to mode is not cylinder click semantic
0:04:14but is characterized by too low aspirants along the non aware
0:04:20this model would is less confined and the topic of frequencies if the wire radius
0:04:24is small enough it can propagate even hundred microns
0:04:30we model the nonlinear dynamics by generalising leno shelling equation for the field envelope
0:04:37than only a parameter of silica is much smaller than the thermo modulation only in
0:04:42three button nonlinearity and can be neglected
0:04:46significant redshifts is observed both for the fundamental and the long-range modes
0:04:53the rolling a parameter of the fundamental mode is so large that even though the
0:04:57surface plot small part and is absorbed in q microns the red shift is still
0:05:02observable
0:05:03com personally the nonlinear dynamics of the long-range mode happens on a much longer scale
0:05:10thanks for your attention and didn't really the reading