scholarly journals Femtosecond excited-state absorption dynamics and optical limiting in fullerene solutions, sol-gel glasses, and thin films

1996 ◽  
Author(s):  
Duncan W. McBranch ◽  
Victor I. Klimov ◽  
Laura B. Smilowitz ◽  
M. Grigorova ◽  
Jeanne M. Robinson ◽  
...  
Keyword(s):  
Thin Films ◽  
Excited State ◽  
Sol Gel ◽  
Excited State Absorption ◽  
Optical Limiting ◽  
Gel Glasses

Optical Limiting Processes in Derivatized Fullerenes and Porphyrins/Phthalocyanines

1997 ◽  
Vol 488 ◽  
Author(s):  
R. Kohlman ◽  
V. Klimov ◽  
X. Shi ◽  
M. Grigorova ◽  
B. R. Mattes ◽  
...  
Keyword(s):  
Spectral Response ◽  
Sol Gel ◽  
Excited State Absorption ◽  
Damage Threshold ◽  
Optical Limiting ◽  
Spectral Studies ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Dynamical Response ◽  
Gel Glasses

AbstractWe review our results from spectral studies of the ultrafast excited-state absorption in fullerenes and derivatized fullerenes. These results allow determination of both the spectral response of reverse saturable absorption (RSA) nonlinearities such as optical limiting (OL) in fullerenes, and the dynamical response for different morphologies. We have investigated the effects of thin film and various sol-gel glass environments on the nanosecond OL and femtosecond dynamics of derivatized fullerenes. These data provide evidence of decay pathways which compete with the intersystem crossing to a triplet from the initial singlet states. With appropriate processing, however, the OL response of derivatized-fullerene sol-gel glasses can be enhanced to approach that of the same molecule in solution, while significantly enhancing the optical damage threshold. The optical limiting of these derivatized fullerenes is compared with that of various porphyrin and phthalocyanine molecules.

scholarly journals Optical Properties of Sn Doped ZnO Thin Film Prepared Using Sol-Gel Method for Optical Limiting Application

2021 ◽  
Vol 24 (3) ◽  
pp. 38-42
Author(s):  
Marwa Mudfer Alqaisi ◽  
◽  
Alla J. Ghazai ◽  
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Optical Properties ◽  
Sol Gel ◽  
Visible Region ◽  
Optical Limiting ◽  
Pure Zinc ◽  
Gel Method ◽  
Sol Gel Method ◽  
Doped Zno

In this work, pure Zinc oxide and tin doped Zinc oxide thin films nanoparticles with various volume concentrations of 2, 4, 6, and 8V/V% were prepared by using the sol-gel method. The optical properties were investigated by using UV-Visible spectroscope, and the value exhibits the direct allowed transition. The average of transmittance was around ~(17-23) %in visible region. The optical energy band gap was calculated with wavelength (300-900) nm for pure ZnO and Sn doped ZnO thin films which decreases with increasing concentration from 3.4 eV to 3.1 eV respectively and red shift. The real dielectric(εr) and the imaginary dielectric εiare the same behavior of the refractive index(n) the extinction coefficient (k) respectively. The optical limiting properties were studied by using an SDL laser with a wavelength of 235 nm. ZnO and doping thin films an found efficient as optic limiting and depend on the concentration of the all samples.

Excited state absorption assisted optical limiting action of Fe decorated γ-BBO nanorods

2019 ◽  
Vol 237 ◽  
pp. 121827 ◽  
Author(s):  
C. Babeela ◽  
N.K. Siji Narendran ◽  
Mehboobali Pannipara ◽  
Abdullah G. Al-Sehemi ◽  
T.C. Sabari Girisun
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Optical Limiting

Excited-state absorption in luminescent conjugated polymer thin films: ultrafast studies of processable polyindenofluorene derivatives

2000 ◽  
Vol 319 (5-6) ◽  
pp. 494-500 ◽  
Author(s):  
Carlos Silva ◽  
David M Russell ◽  
Mark A Stevens ◽  
J.Devin Mackenzie ◽  
Sepas Setayesh ◽  
...  
Keyword(s):  
Thin Films ◽  
Excited State ◽  
Conjugated Polymer ◽  
Polymer Thin Films ◽  
Excited State Absorption

Fast and reversible excited state absorption in II-VI-based nanocomposite thin films

2005 ◽  
Vol 87 (6) ◽  
pp. 063104 ◽  
Author(s):  
Parinda Vasa ◽  
Pushan Ayyub ◽  
B. P. Singh
Keyword(s):  
Thin Films ◽  
Excited State ◽  
Excited State Absorption ◽  
Nanocomposite Thin Films

Broadband optical limiting based on excited state absorption in Pt:ethynyl

2000 ◽  
Vol 88 (4) ◽  
pp. 1726-1732 ◽  
Author(s):  
J. Staromlynska ◽  
T. J. McKay ◽  
P. Wilson
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Optical Limiting

Tunable emission and excited state absorption induced optical limiting in Tb2(MoO4)3: Sm3+/Eu3+ nanophosphors

2016 ◽  
Vol 62 ◽  
pp. 110-118 ◽  
Author(s):  
Kamal P. Mani ◽  
Perumbilavil Sreekanth ◽  
G. Vimal ◽  
P.R. Biju ◽  
N.V. Unnikrishnan ◽  
...  
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Optical Limiting ◽  
Tunable Emission

A STUDY OF PHOTOACOUSTIC EFFECTS AND OPTICAL LIMITING IN THE SOLUTION OF C60 IN TOLUENE

1996 ◽  
Vol 10 (01n02) ◽  
pp. 61-67 ◽  
Author(s):  
RIJU C. ISSAC ◽  
C.V. BINDHU ◽  
S.S. HARILAL ◽  
GEETHA K. VARIER ◽  
V.P.N. NAMPOORI ◽  
...  
Keyword(s):  
Excited State ◽  
Nd:Yag Laser ◽  
Excited State Absorption ◽  
Optical Limiting ◽  
Nonlinear Scattering ◽  
Dominant Process ◽  
532 Nm

Pulsed photoacoustic studies in solution of C 60 in toluene have been made using the 532 nm radiation from a frequency doubled Nd:YAG laser. Though C 60 is found to exhibit the phenomenon of optical limiting, the results on photoacoustic measurements do not give any indication of multiphoton transitions as suggested in some of the earlier works. Results of photoacoustic measurements show that excited state absorption is the dominant process responsible for optical limiting while phenomena like nonlinear scattering may contribute to a lesser extent.

Excited State Absorption and Optical Limiting in Solutions of Metallophthalocyanines

1991 ◽  
pp. 369-382 ◽  
Author(s):  
J. W. Perry ◽  
L. R. Khundkar ◽  
D. R. Coulter ◽  
D. Alvarez ◽  
S. R. Marder ◽  
...  
Keyword(s):  
Excited State ◽  
Excited State Absorption ◽  
Optical Limiting
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