Excited state absorption of pump and laser radiations in NYAB non-linear crystal operating at 1.3µm for visible laser light generation

AbstractThe fullerene materials are well known for their non-linear behaviour arising from excited state absorption processes. In solution, the processes can set in at low irradiance levels, although evidence is building that the magnitude of the effects is dependent on the solvent used in the experiments and the role of charge transfer processes. In evaporated films of C60, the solvent is absent and reduced non-linearities are seen as irradiances approach the laser damage threshold of the films. When the chromophor is incorporated into polymer films, non-linear processes are found at the same levels as the solution case provided that some residual solvent remains in the composite. Excited state absorption spectra suggest that some ionisation of the C60 may be occuring.

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Fullerene non-linear excited state absorption induced by gold nanoparticles light harvesting

Synthetic Metals ◽

10.1016/j.synthmet.2005.01.032 ◽

2005 ◽

Vol 155 (2) ◽

pp. 283-286 ◽

Cited By ~ 25

Author(s):

V. Amendola ◽

G. Mattei ◽

C. Cusan ◽

M. Prato ◽

M. Meneghetti

Keyword(s):

Gold Nanoparticles ◽

Excited State ◽

Light Harvesting ◽

Excited State Absorption ◽

Non Linear

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Suppression of excited state absorption (ESA) in lasing materials and non-linear optical pulse propagation dynamics in the media subject to ESA

(CLEO). Conference on Lasers and Electro-Optics, 2005. ◽

10.1109/cleo.2005.202036 ◽

2005 ◽

Author(s):

R. Kolesov ◽

E. Kuznetsova ◽

O. Kocharovskaya

Keyword(s):

Excited State ◽

Optical Pulse ◽

Pulse Propagation ◽

Excited State Absorption ◽

Optical Pulse Propagation ◽

Non Linear ◽

The Media ◽

Propagation Dynamics ◽

Linear Optical

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Non-Linear Optical Characteristics of Novel Porphyrin Dye Media

MRS Proceedings ◽

10.1557/proc-479-29 ◽

1997 ◽

Vol 479 ◽

Cited By ~ 13

Author(s):

K. J. McEwan ◽

J. M. Robertson ◽

A. P. Wylie ◽

H. L. Anderson

Keyword(s):

Excited State ◽

Material Parameter ◽

Central Atom ◽

Heavy Atom ◽

Excited State Absorption ◽

Absorption Profile ◽

Non Linear ◽

Linear Optical Properties ◽

Linear Optical ◽

Atom Position

AbstractMeasurements of sensitive RSA phenonema in new porphyrin dyes are presented. Both the linear and non-linear optical properties are shown to depend strongly on the molecular structure. A detailed analysis of two of the porphyrins reveals that inter-systems crossing rate and the excited state absorption profile are strongly influenced by substitution of a heavy atom into the central atom position. It is shown that by appropriate choice of wavelength values in excess of 30 can be achieved for the material parameter σex / σgr. This value compares well with previously reported results and is achieved in conjunction with excited state lifetimes on the order of 300 ns.

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