Near-infrared optical gain and stimulated emission in organic-compound-doped polymer waveguides

2004 ◽  
Author(s):  
Takeyuki Kobayashi ◽  
Jean-Baptiste Savatier ◽  
Grace Jordan ◽  
Werner J. Blau ◽  
Yasuhiro Suzuki ◽  
...  
Keyword(s):  
Organic Compound ◽  
Near Infrared ◽  
Optical Gain ◽  
Stimulated Emission ◽  
Polymer Waveguides ◽  
Doped Polymer

Optical gain in dye-doped polymer waveguides using oxidized porous silicon cladding

2007 ◽  
Author(s):  
Daniel Navarro-Urrios ◽  
Mher Ghulinyan ◽  
Paolo Bettotti ◽  
Néstor Capuj ◽  
Claudio J. Oton ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Optical Gain ◽  
Polymer Waveguides ◽  
Oxidized Porous Silicon ◽  
Doped Polymer

Effects of the host matrix on near infrared red tail absorption of chromophore doped polymer waveguides

1999 ◽  
Author(s):  
Michael Canva ◽  
Anne-Claire Le Duff ◽  
Vincent Ricci ◽  
Tomas Pliska ◽  
George Stegeman ◽  
...  
Keyword(s):  
Near Infrared ◽  
Polymer Waveguides ◽  
Host Matrix ◽  
Doped Polymer

Stimulated emission in dendrimer-doped polymer waveguides

2001 ◽  
Vol 393 (1-2) ◽  
pp. 278-283 ◽  
Author(s):  
Akira Otomo ◽  
Sonoko Otomo ◽  
Shiyoshi Yokoyama ◽  
Shinro Mashiko
Keyword(s):  
Stimulated Emission ◽  
Polymer Waveguides ◽  
Doped Polymer

scholarly journals Optical Gain in Semiconducting Polymer Nano and Mesoparticles

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1138
Author(s):  
Mark Geoghegan ◽  
Marta M. Mróz ◽  
Chiara Botta ◽  
Laurie Parrenin ◽  
Cyril Brochon ◽  
...  
Keyword(s):  
Near Infrared ◽  
Transient Absorption ◽  
Optical Gain ◽  
Stimulated Emission ◽  
Transient Absorption Spectroscopy ◽  
Charge Generation ◽  
Charge Formation ◽  
Femtosecond Transient Absorption ◽  
Uv Excitation ◽  
Nanoparticle Film

The presence of excited-states and charge-separated species was identified through UV and visible laser pump and visible/near-infrared probe femtosecond transient absorption spectroscopy in spin coated films of poly[N-9″-heptadecanyl-2,7-carbazole-alt-5,5-(4,7-di-2-thienyl-2′,1′,3′-benzothiadiazole)] (PCDTBT) nanoparticles and mesoparticles. Optical gain in the mesoparticle films is observed after excitation at both 400 and 610 nm. In the mesoparticle film, charge generation after UV excitation appears after around 50 ps, but little is observed after visible pump excitation. In the nanoparticle film, as for a uniform film of the pure polymer, charge formation was efficiently induced by UV excitation pump, while excitation of the low energetic absorption states (at 610 nm) induces in the nanoparticle film a large optical gain region reducing the charge formation efficiency. It is proposed that the different intermolecular interactions and molecular order within the nanoparticles and mesoparticles are responsible for their markedly different photophysical behavior. These results therefore demonstrate the possibility of a hitherto unexplored route to stimulated emission in a conjugated polymer that has relatively undemanding film preparation requirements.

Stimulated emission and optical gain in LaF3:Nd nanoparticle-doped polymer-based waveguides

2004 ◽  
Vol 85 (25) ◽  
pp. 6104-6106 ◽  
Author(s):  
R. Dekker ◽  
D. J. W. Klunder ◽  
A. Borreman ◽  
M. B. J. Diemeer ◽  
K. Wörhoff ◽  
...  
Keyword(s):  
Optical Gain ◽  
Stimulated Emission ◽  
Doped Polymer

scholarly journals Signature of Generalized Gibbs Ensemble Deviation from Equilibrium: Negative Absorption Induced by a Local Quench

Entropy ◽  
2021 ◽  
Vol 23 (2) ◽  
pp. 220
Author(s):  
Lorenzo Rossi ◽  
Fabrizio Dolcini ◽  
Fabio Cavaliere ◽  
Niccolò Traverso Ziani ◽  
Maura Sassetti ◽  
...  
Keyword(s):  
Optical Gain ◽  
Electron System ◽  
Bound State ◽  
Stimulated Emission ◽  
Optical Measurements ◽  
Gibbs Ensemble ◽  
Attractive Potential ◽  
Dimensional Electron System ◽  
Constants Of Motion ◽  
Generalized Gibbs Ensemble

When a parameter quench is performed in an isolated quantum system with a complete set of constants of motion, its out of equilibrium dynamics is considered to be well captured by the Generalized Gibbs Ensemble (GGE), characterized by a set {λα} of coefficients related to the constants of motion. We determine the most elementary GGE deviation from the equilibrium distribution that leads to detectable effects. By quenching a suitable local attractive potential in a one-dimensional electron system, the resulting GGE differs from equilibrium by only one single λα, corresponding to the emergence of an only partially occupied bound state lying below a fully occupied continuum of states. The effect is shown to induce optical gain, i.e., a negative peak in the absorption spectrum, indicating the stimulated emission of radiation, enabling one to identify GGE signatures in fermionic systems through optical measurements. We discuss the implementation in realistic setups.

Rib waveguide dye-doped polymer amplifier with up to 26dB optical gain at 625nm

2004 ◽  
Vol 85 (22) ◽  
pp. 5137-5139 ◽  
Author(s):  
M. A. Reilly ◽  
C. Marinelli ◽  
C. N. Morgan ◽  
R. V. Penty ◽  
I. H. White ◽  
...  
Keyword(s):  
Optical Gain ◽  
Rib Waveguide ◽  
Doped Polymer
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