The measurements of the angular distribution of two-photon-excited fluorescence of a dye solution in an aqueous aerosol are reported. It is shown that the fluorescence of an aerosol with a dye is one and a half to two times greater in the backward direction than in the forward direction.
The experimentally obtained dependences of acoustic signals on the energy of femtosecond pulses in the filamentation mode, propagating in a liquid-drop aerosol with nanoparticles of various concentrations imitating Aitken nuclei, are presented. It is shown that, under the action of a femtosecond pulse filament, a water aerosol jet breaks into two jets.
Experimental results of measurements of the threshold power density of stimulated radiation in solutions of the coumarin-30 dye with ZnO nanoparticles irradiated with femtosecond laser pulses are presented. It is shown that the thresholds of stimulated emission in solutions of the coumarin-30 dye with ZnO nanoparticles are approximately three orders of magnitude higher than the thresholds of stimulated emission in solutions of the coumarin-30 dye with ZnO nanoparticles irradiated with nanosecond laser pulses.
It has been experimentally shown that the thresholds of non-resonator laser generation in heterogeneous planar active media in solutions with nanoparticles of gold, platinum and silver practically coincide. The excess energy obtained by plasmon resonance does not affect the lowering of laser generation thresholds but is spent on heating the nanoparticles.
The studies have shown that films with different thicknesses, but practically identical transmittance values, give absolutely different results. This suggests that in addition to transmission, the generation characteristics are significantly affected by the thickness of the matrix being researched.
The paper presents the results of numerical simulation of the dispersion properties of surface plasmon-polaritons at the interface between an active composite medium based on metallic nanoparticles and a substrate of the same metals in the visible wavelength range. It is shown that the amplification and dispersion properties of surface plasmon polaritons in these structures can be varied within wide limits by varying the concentration of nanoparticles.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.