Stimulated emission, lasing, and line narrowing in conjugated polymers

1997 ◽  
Author(s):  
Graham J. Denton ◽  
Nir Tessler ◽  
Mark A. Stevens ◽  
Seamus E. Burns ◽  
Nick T. Harrison ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Stimulated Emission ◽  
Line Narrowing

Laser Oscillation in Aggregates of Ultrasmall Si Nanoparticles

2002 ◽  
Vol 728 ◽  
Author(s):  
Munir H. Nayfeh
Keyword(s):  
Stimulated Emission ◽  
Gaussian Beams ◽  
Single Particles ◽  
Nonlinear Characteristics ◽  
Femtosecond Radiation ◽  
Highly Nonlinear ◽  
Line Narrowing ◽  
Si Nanoparticles ◽  
Speckle Patterns ◽  
Spectral Line Narrowing

AbstractWe dispersed electrochemically etched Si into ultrabright ultrasmall nanoparticles, with brightness higher than fluorescein or rhodamine. The emission from single particles is readily detectable. Aggregates or films of the particles exhibit emission with highly nonlinear characteristics. We observe directed blue beams at ∼ 410 nm between faces of aggregates excited by femtosecond radiation at 780 nm; and at ∼ 610 nm from aggregates of red luminescent Si nanoparticles excited by radiation at 550-570 nm from a mercury lamp. Intense directed Gaussian beams, a pumping threshold, spectral line narrowing, and speckle patterns manifest the emission. The results are analyzed in terms of population inversion and stimulated emission in quantum confinement-induced Si-Si dimer phase, found only on ultrasmall Si nanoparticles. This microlasing constitutes an important step towards the realization of a laser on a chip.

Direct Probe of Spectrally Narrowed Emission from π-Conjugated Polymers:  The Elucidation of Mechanism for Spectral Line Narrowing

2002 ◽  
Vol 106 (35) ◽  
pp. 8921-8927 ◽  
Author(s):  
Sae Chae Jeoung ◽  
Dae Hong Jeong ◽  
Taek Ahn ◽  
Ja-Young Han ◽  
Min-Sik Jang ◽  
...  
Keyword(s):  
Spectral Line ◽  
Conjugated Polymers ◽  
Line Narrowing ◽  
Spectral Line Narrowing

scholarly journals Advances in Conjugated Polymer Lasers

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 443 ◽  
Author(s):  
Hongyan Xia ◽  
Chang Hu ◽  
Tingkuo Chen ◽  
Dan Hu ◽  
Muru Zhang ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Cross Sections ◽  
Conjugated Polymer ◽  
Low Cost ◽  
Research Direction ◽  
Stimulated Emission ◽  
Laser Materials ◽  
Radiation Mechanism ◽  
The Subject ◽  
Low Cost Manufacturing

This paper provides a review of advances in conjugated polymer lasers. High photoluminescence efficiencies and large stimulated emission cross-sections coupled with wavelength tunability and low-cost manufacturing processes make conjugated polymers ideal laser gain materials. In recent years, conjugated polymer lasers have become an attractive research direction in the field of organic lasers and numerous breakthroughs based on conjugated polymer lasers have been made in the last decade. This paper summarizes the recent progress of the subject of laser processes employing conjugated polymers, with a focus on the photoluminescence principle and excitation radiation mechanism of conjugated polymers. Furthermore, the effect of conjugated polymer structures on the laser threshold is discussed. The most common polymer laser materials are also introduced in detail. Apart from photo-pumped conjugated polymer lasers, a direction for the future development of electro-pumped conjugated polymer lasers is proposed.

Stimulated emission from films of conjugated polymers and oligomers

1997 ◽  
Author(s):  
Paul F. van Hutten ◽  
Hendrik-Jan Brouwer ◽  
Victor V. Krasnikov ◽  
T. A. Pham ◽  
Richard E. Gill ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Stimulated Emission

Highly photoluminescent conjugated polymers: stimulated emission and device applications

1997 ◽  
Author(s):  
Fumitomo Hide ◽  
Benjamin J. Schwartz ◽  
Maria A. Diaz-Garcia ◽  
Alan J. Heeger
Keyword(s):  
Conjugated Polymers ◽  
Stimulated Emission ◽  
Device Applications

Laser action of two conjugated polymers in solution and in solid matrix: The effect of aggregates on spontaneous and stimulated emission

2002 ◽  
Vol 65 (19) ◽  
Author(s):  
M. Fakis ◽  
I. Polyzos ◽  
G. Tsigaridas ◽  
V. Giannetas ◽  
P. Persephonis ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Laser Action ◽  
Stimulated Emission ◽  
Solid Matrix
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