Special features of the fluorescence of organic molecules with two-photon absorption in a drop upon exposure to a femtosecond laser pulse

2009 ◽  
Vol 52 (8) ◽  
pp. 862-870 ◽  
Author(s):  
A. D. Bulygin ◽  
E. E. Bykova ◽  
A. A. Zemlyanov ◽  
Al. A. Zemlyanov
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Femtosecond Laser Pulse ◽  
Organic Molecules ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon

Two-photon absorption and optical limiting of a fluorenyl-based chromophore with femtosecond laser pulse

2015 ◽  
Vol 350 ◽  
pp. 144-147 ◽  
Author(s):  
Hong Ma ◽  
Jiancai Leng ◽  
Mei Liu ◽  
Lina Zhao ◽  
Yang Jiao
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Femtosecond Laser Pulse ◽  
Optical Limiting ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon

Two-photon absorption within layered Bi2Te3 topological insulators and the role of nonlinear transmittance therein

2019 ◽  
Vol 7 (23) ◽  
pp. 7027-7034 ◽  
Author(s):  
Junpeng Qiao ◽  
Meng-Yuan Chuang ◽  
Jia-Chi Lan ◽  
Yuan-Yao Lin ◽  
Wei-Heng Sung ◽  
...  
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Femtosecond Laser Pulse ◽  
Bismuth Telluride ◽  
Topological Insulator ◽  
Topological Insulators ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon

In this study, strong two-photon absorption (TPA) in a layered bismuth telluride (Bi2Te3) topological insulator (TI) is observed and investigated by the Z-scan method under excitation with a femtosecond laser pulse at a wavelength of 1056 nm.

Fabrication of Three-Dimensional Micro-Structures with Two-Photon Absorption by Femtosecond Laser

2006 ◽  
Vol 532-533 ◽  
pp. 568-571
Author(s):  
Ming Zhou ◽  
Hai Feng Yang ◽  
Li Peng Liu ◽  
Lan Cai
Keyword(s):  
Photonic Crystal ◽  
Femtosecond Laser ◽  
Detection System ◽  
Three Dimensional ◽  
Photon Absorption ◽  
Micro Fabrication ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Photo Polymerization ◽  
System A

The photo-polymerization induced by Two-Photon Absorption (TPA) is tightly confined in the focus because the efficiency of TPA is proportional to the square of intensity. Three-dimensional (3D) micro-fabrication can be achieved by controlling the movement of the focus. Based on this theory, a system for 3D-micro-fabrication with femtosecond laser is proposed. The system consists of a laser system, a microscope system, a real-time detection system and a 3D-movement system, etc. The precision of micro-machining reaches a level down to 700nm linewidth. The line width was inversely proportional to the fabrication speed, but proportional to laser power and NA. The experiment results were simulated, beam waist of 0.413μm and TPA cross section of 2×10-54cm4s was obtained. While we tried to optimize parameters, we also did some research about its applications. With TPA photo-polymerization by means of our experimental system, 3D photonic crystal of wood-pile structure twelve layers and photonic crystal fiber are manufactured. These results proved that the micro-fabrication system of TPA can not only obtain the resolution down to sub-micron level, but also realize real 3D micro-fabrication.

Phase control of a two-photon transition with shaped femtosecond laser-pulse sequences

2004 ◽  
Vol 70 (6) ◽  
Author(s):  
A. Präkelt ◽  
M. Wollenhaupt ◽  
C. Sarpe-Tudoran ◽  
T. Baumert
Keyword(s):  
Laser Pulse ◽  
Femtosecond Laser ◽  
Femtosecond Laser Pulse ◽  
Pulse Sequences ◽  
Phase Control ◽  
Two Photon ◽  
Photon Transition
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