Impact of silver nanoparticles two-photon resonance on Kerr effect of organic dye solutions

2021 ◽  
Author(s):  
Arturs Bundulis ◽  
Jelena Mikelsone ◽  
Martins Rutkis
Keyword(s):  
Silver Nanoparticles ◽  
Kerr Effect ◽  
Organic Dye ◽  
Two Photon ◽  
Photon Resonance ◽  
Dye Solutions

scholarly journals Nonlinear Absorption and Ultrafast Dynamics of Ag Nanoparticle

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 233
Author(s):  
Jijuan Jiang ◽  
Jun Wang ◽  
Tong Wu ◽  
Yachen Gao
Keyword(s):  
Silver Nanoparticles ◽  
Time Constant ◽  
Laser Intensity ◽  
Photon Absorption ◽  
Saturable Absorption ◽  
Phonon Coupling ◽  
Saturated Absorption ◽  
Coupling Process ◽  
Two Photon Absorption ◽  
Two Photon

Resonant nonlinear optical absorption of silver nanoparticles was studied experimentally via open aperture Z-scan using 130 fs, 400 nm laser pulses. Experimental results show that, at low laser intensity, silver nanoparticles can exhibit saturated absorption. While at high laser intensity, it shows reverse saturated absorption. The saturable absorption is explained in terms of ground state plasmon bleaching, while the reverse saturable absorption is believed to be from two-photon absorption. Saturable optical intensity and two-photon absorption coefficient were obtained to be 1.3×1010 W/m2 and 3.3×10−10 m/W, respectively. The energy relaxation process of Ag nanoparticles after laser excitation was studied via pump-probe technique at 400 nm. Experimental results demonstrated that energy relaxation included electron-phonon coupling process with time constant τ1=(713±50) fs, and phonon-phonon coupling process with time constant τ2=(25.2±3) ps, respectively.

Influence of atomic motion on the shape of two-photon resonance in gas

JETP Letters ◽  
2000 ◽  
Vol 72 (3) ◽  
pp. 119-122 ◽  
Author(s):  
A. V. Taichenachev ◽  
A. M. Tumaikin ◽  
V. I. Yudin
Keyword(s):  
Atomic Motion ◽  
Two Photon ◽  
Photon Resonance
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