Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\26644322
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Sci+Rep
2015 ; 5
(ä): 17899
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Ultrafast Thermal Nonlinearity
#MMPMID26644322
Khurgin JB
; Sun G
; Chen WT
; Tsai WY
; Tsai DP
Sci Rep
2015[Dec]; 5
(ä): 17899
PMID26644322
show ga
Third order nonlinear optical phenomena explored in the last half century have
been predicted to find wide range of applications in many walks of life, such as
all-optical switching, routing, and others, yet this promise has not been
fulfilled primarily because the strength of nonlinear effects is too low when
they are to occur on the picosecond scale required in today's signal processing
applications. The strongest of the third-order nonlinearities, engendered by
thermal effects, is considered to be too slow for the above applications. In this
work we show that when optical fields are concentrated into the volumes on the
scale of few tens of nanometers, the speed of the thermo-optical effects
approaches picosecond scale. Such a sub-diffraction limit concentration of field
can be accomplished with the use of plasmonic effects in metal nanoparticles
impregnating the thermo-optic dielectric (e.g. amorphous Si) and leads to phase
shifts sufficient for all optical switching on ultrafast scale.