Ultrafast relaxation dynamics of the one-dimensional molecular chain: The time-resolved spontaneous emission and exciton coherence

2003 ◽  
Vol 119 (9) ◽  
pp. 4891-4904 ◽  
Author(s):  
Satoshi Tanaka
Keyword(s):  
Spontaneous Emission ◽  
Molecular Chain ◽  
Relaxation Dynamics ◽  
Time Resolved ◽  
One Dimensional ◽  
Ultrafast Relaxation ◽  
The One

Control of Spontaneous Emission from Colloidal Quantum Dots in a Polymer Microcavity

2006 ◽  
Vol 959 ◽  
Author(s):  
Vinod Menon ◽  
Nikesh Valappil ◽  
Iosef Zeylikovich ◽  
Taposh Gayen ◽  
Bidyut Das ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Spontaneous Emission ◽  
Defect Layer ◽  
Bragg Reflectors ◽  
Spontaneous Emission Rate ◽  
Time Resolved ◽  
One Dimensional ◽  
The One ◽  
Time Resolved Photoluminescence ◽  
Temperature Time

ABSTRACTWe report the fabrication of a one dimensional microcavity structure embedded with colloidal CdSe/ZnS core/shell quantum dots using solution processing. The microcavity structures were fabricated by spin coating alternating layers of polymers of different refractive indices (poly-vinylcarbazole, and poly-acrylic acid) to form the distributed Bragg reflectors (DBRs). Greater than 90% reflectivity was obtained using ten periods of the structure. The one dimensional microcavity was formed by sandwiching a λ/n thick defect layer between two such DBRs. The microcavity demonstrated directionality in emission and well behaved dispersion characteristics. Room temperature time-resolved photoluminescence measurements carried out on this structure showed six fold enhancement of spontaneous emission rate. The photoluminescence decay time of the quantum dots was found to be ∼ 1 ns while for the quantum dots embedded in the microcavity it was ∼150 ps.

scholarly journals Anomalous Diffusion with an Apparently Negative Diffusion Coefficient in a One-Dimensional Quantum Molecular Chain Model

Symmetry ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 506
Author(s):  
Sho Nakade ◽  
Kazuki Kanki ◽  
Satoshi Tanaka ◽  
Tomio Petrosky
Keyword(s):  
Diffusion Coefficient ◽  
Diffusion Constant ◽  
Mean Square Displacement ◽  
Second Law Of Thermodynamics ◽  
Molecular Chain ◽  
Chain Model ◽  
Phase Mixing ◽  
One Dimensional ◽  
The One ◽  
Negative Diffusion

An interesting anomaly in the diffusion process with an apparently negative diffusion coefficient defined through the mean-square displacement in a one-dimensional quantum molecular chain model is shown. Nevertheless, the system satisfies the H-theorem so that the second law of thermodynamics is satisfied. The reason why the “diffusion constant” becomes negative is due to the effect of the phase mixing process, which is a characteristic result of the one-dimensionality of the system. We illustrate the situation where this negative “diffusion constant” appears.

Ultrafast relaxation investigated by Photoelectron Circular Dichroism : an isomeric comparison of Camphor and Fenchone

2021 ◽  
Author(s):  
Valérie Blanchet ◽  
Dominique Descamps ◽  
stephane Petit ◽  
Yann Mairesse ◽  
bernard Pons ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Imaging Technique ◽  
Velocity Map Imaging ◽  
Relaxation Dynamics ◽  
Time Resolved ◽  
Pump Probe ◽  
Ultrafast Relaxation ◽  
Circular Dichroïsm ◽  
Isomeric Effects

We study isomeric effects using time resolved photoelectron circular dichroism (PECD). By a (1+1’)pump-probe ionisation with photoelectron collected by velocity map imaging technique, we compare relaxation dynamics from the 3s-Rydberg...

Ultrafast Relaxation Dynamics of Excitons in One-dimensional Metal Complexes

1998 ◽  
Vol 314 (1) ◽  
pp. 65-70
Author(s):  
Shinichiro Iwai ◽  
Toshihide Kamata ◽  
Kaoru Yamamoto ◽  
Toshio Fukaya ◽  
Shigeo Murata ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Relaxation Dynamics ◽  
One Dimensional ◽  
Ultrafast Relaxation

Measurement of spontaneous-emission enhancement near the one-dimensional photonic band edge of semiconductor heterostructures

1996 ◽  
Vol 53 (4) ◽  
pp. 2799-2803 ◽  
Author(s):  
Michael D. Tocci ◽  
Michael Scalora ◽  
Mark J. Bloemer ◽  
Jonathan P. Dowling ◽  
Charles M. Bowden
Keyword(s):  
Spontaneous Emission ◽  
Semiconductor Heterostructures ◽  
Band Edge ◽  
One Dimensional ◽  
Emission Enhancement ◽  
The One ◽  
Photonic Band

Ultrafast relaxation dynamics of electronically excited piperidine: ionization signatures of Rydberg/valence evolution

2016 ◽  
Vol 18 (36) ◽  
pp. 25070-25079 ◽  
Author(s):  
Liv B. Klein ◽  
James O. F. Thompson ◽  
Stuart W. Crane ◽  
Lisa Saalbach ◽  
Theis I. Sølling ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Valence State ◽  
Aliphatic Amine ◽  
Relaxation Dynamics ◽  
Time Resolved ◽  
Ultrafast Relaxation ◽  
Secondary Aliphatic Amine ◽  
State Evolution ◽  
Electronically Excited

Time-resolved photoelectron spectroscopy reveals distinct ionization signatures of Rydberg-to-valence state evolution in the secondary aliphatic amine piperidine.

Ultrafast Relaxation Dynamics in trans-1,3-Butadiene Studied by Time-Resolved Photoelectron Spectroscopy with High Harmonic Pulses

2014 ◽  
Vol 5 (10) ◽  
pp. 1760-1765 ◽  
Author(s):  
Ayumu Makida ◽  
Hironori Igarashi ◽  
Takehisa Fujiwara ◽  
Taro Sekikawa ◽  
Yu Harabuchi ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
High Harmonic ◽  
Relaxation Dynamics ◽  
Time Resolved ◽  
Ultrafast Relaxation ◽  
In Trans

The role of amplified spontaneous emission in the ultrafast relaxation dynamics of polymer films

1998 ◽  
Vol 289 (1-2) ◽  
pp. 205-210 ◽  
Author(s):  
S. Stagira ◽  
M. Nisoli ◽  
G. Cerullo ◽  
M. Zavelani–Rossi ◽  
S. De Silvestri ◽  
...  
Keyword(s):  
Spontaneous Emission ◽  
Polymer Films ◽  
Amplified Spontaneous Emission ◽  
Relaxation Dynamics ◽  
Ultrafast Relaxation

Electronic Structure of One-Dimensional Biradical Molecular Chain

2014 ◽  
Vol 1605 ◽  
Author(s):  
H. Koike ◽  
K. Ogawa ◽  
T. Kubo ◽  
K. Uchida ◽  
M. Chikamatsu ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Band Structure ◽  
Photoelectron Spectroscopy ◽  
Organic Molecules ◽  
Molecular Chain ◽  
Ultraviolet Photoelectron Spectroscopy ◽  
Deposition Method ◽  
One Dimensional ◽  
The One

ABSTRACTWe investigated electronic structure of one-dimensional biradical molecular chain which is constructed by exploiting the covalency between organic molecules of a diphenyl derivative of s-indacenodiphenalene (Ph2-IDPL). To control the crystallinity, we used gas deposition method. Ultraviolet photoelectron spectroscopy (UPS) revealed developed band structure with wide dispersion of the one-dimensional biradical molecular chain.

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