Photoinduced Localized Phonons and Instantaneous Structure Contributing to Amplified Spontaneous Emission of Conjugated Polymers

2017 ◽  
Vol 121 (2) ◽  
pp. 1055-1061 ◽  
Author(s):  
Deyao Jiang ◽  
Weikang Chen ◽  
Yusong Zhang ◽  
Sheng Li ◽  
Thomas F. George
Keyword(s):  
Conjugated Polymers ◽  
Spontaneous Emission ◽  
Amplified Spontaneous Emission

Transient Aspects and Ultrafast Dynamical Processes of Amplified Spontaneous Emission in Conjugated Polymers

2018 ◽  
Vol 122 (47) ◽  
pp. 10762-10766
Author(s):  
Zhe Lin ◽  
Yusong Zhang ◽  
Weikang Chen ◽  
Thomas F. George ◽  
Sheng Li
Keyword(s):  
Conjugated Polymers ◽  
Spontaneous Emission ◽  
Amplified Spontaneous Emission ◽  
Dynamical Processes

Amplified Spontaneous Emission of Cross-linkable Conjugated Polymers

2005 ◽  
Author(s):  
Bodo Wallikewitz ◽  
Matthias de la Rosa ◽  
Dirk Hertel ◽  
Klaus Meerholz ◽  
Aurelie Falcou ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Spontaneous Emission ◽  
Amplified Spontaneous Emission

Low-threshold amplified spontaneous emission in blends of conjugated polymers

1998 ◽  
Vol 73 (24) ◽  
pp. 3492-3494 ◽  
Author(s):  
R. Gupta ◽  
M. Stevenson ◽  
A. Dogariu ◽  
M. D. McGehee ◽  
J. Y. Park ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Spontaneous Emission ◽  
Amplified Spontaneous Emission ◽  
Low Threshold

Electrochemical control of amplified spontaneous emission in conjugated polymers

2012 ◽  
Vol 13 (6) ◽  
pp. 954-958 ◽  
Author(s):  
Georgios Tzamalis ◽  
Xavier Crispin ◽  
Mats Andersson ◽  
Magnus Berggren
Keyword(s):  
Conjugated Polymers ◽  
Spontaneous Emission ◽  
Amplified Spontaneous Emission ◽  
Electrochemical Control

scholarly journals Charge Accumulation of Amplified Spontaneous Emission in a Conjugated Polymer Chain and Its Dynamical Phonon Spectra

Molecules ◽  
2020 ◽  
Vol 25 (13) ◽  
pp. 3003
Author(s):  
Zhe Lin ◽  
Jiahao Chen ◽  
Yusong Zhang ◽  
Jianguo Shen ◽  
Sheng Li ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Spontaneous Emission ◽  
Polymer Chain ◽  
Conjugated Polymer ◽  
Optical Pumping ◽  
Amplified Spontaneous Emission ◽  
Electric Polarization ◽  
Stimulated Emission ◽  
Charge Accumulation ◽  
Phonon Spectra

In this article, the detailed photoexcitation dynamics which combines nonadiabatic molecular dynamics with electronic transitions shows the occurrence of amplified spontaneous emission (ASE) in conjugated polymers, accompanied by spontaneous electric polarization. The elaborate molecular dynamic process of ultrafast photoexcitation can be described as follows: Continuous external optical pumping (laser of 70 µJ/cm2) not only triggers the appearance of an instantaneous four-level electronic structure but causes population inversion for ASE as well. At the same time, the phonon spectrum of the conjugated polymer changes, and five local infrared lattice vibrational modes form at the two ends, which break the original symmetry in the system and leads to charge accumulation at the ends of the polymer chain without an external electric field. This novel phenomenon gives a brand-new avenue to explain how the lattice vibrations play a role in the evolution of the stimulated emission, which leads to an ultrafast effect in solid conjugated polymers.

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