scholarly journals All-THz pump-probe spectroscopy of the intersubband AC-Stark effect in a wide GaAs quantum well

2020 ◽  
Vol 28 (17) ◽  
pp. 25358
Author(s):  
Johannes Schmidt ◽  
Stephan Winnerl ◽  
Emmanouil Dimakis ◽  
René Hübner ◽  
Harald Schneider ◽  
...  
Keyword(s):  
Quantum Well ◽  
Stark Effect ◽  
Pump Probe ◽  
Probe Spectroscopy ◽  
Ac Stark Effect

scholarly journals Ultrafast generation of pseudo-magnetic field for valley excitons in WSe2monolayers

Science ◽  
2014 ◽  
Vol 346 (6214) ◽  
pp. 1205-1208 ◽  
Author(s):  
Jonghwan Kim ◽  
Xiaoping Hong ◽  
Chenhao Jin ◽  
Su-Fei Shi ◽  
Chih-Yuan S. Chang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Stark Effect ◽  
Transition Metal Dichalcogenides ◽  
Degree Of Freedom ◽  
Energy Splitting ◽  
Pump Probe ◽  
Valley Polarization ◽  
Metal Dichalcogenides ◽  
Optical Stark Effect ◽  
Probe Spectroscopy

The valley pseudospin is a degree of freedom that emerges in atomically thin two-dimensional transition metal dichalcogenides (MX2). The capability to manipulate it, in analogy to the control of spin in spintronics, can open up exciting opportunities. Here, we demonstrate that an ultrafast and ultrahigh valley pseudo-magnetic field can be generated by using circularly polarized femtosecond pulses to selectively control the valley degree of freedom in monolayer MX2.Using ultrafast pump-probe spectroscopy, we observed a pure and valley-selective optical Stark effect in WSe2monolayers from the nonresonant pump, resulting in an energy splitting of more than 10 milli–electron volts between the K and K′ valley exciton transitions. Our study opens up the possibility to coherently manipulate the valley polarization for quantum information applications.

Pump-Probe Experiments with a Single Molecule: ac-Stark Effect and Nonlinear Optical Response

1995 ◽  
Vol 75 (8) ◽  
pp. 1514-1517 ◽  
Author(s):  
Ph. Tamarat ◽  
B. Lounis ◽  
J. Bernard ◽  
M. Orrit ◽  
S. Kummer ◽  
...  
Keyword(s):  
Single Molecule ◽  
Nonlinear Optical ◽  
Stark Effect ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Pump Probe ◽  
Ac Stark Effect

scholarly journals Femtosecond pump-probe spectroscopy of intersubband relaxation dynamics in narrow InGaAs∕AlAsSb quantum well structures

2006 ◽  
Vol 89 (17) ◽  
pp. 171104 ◽  
Author(s):  
C. V.-B. Tribuzy ◽  
S. Ohser ◽  
S. Winnerl ◽  
J. Grenzer ◽  
H. Schneider ◽  
...  
Keyword(s):  
Quantum Well ◽  
Relaxation Dynamics ◽  
Pump Probe ◽  
Quantum Well Structures ◽  
Probe Spectroscopy ◽  
Intersubband Relaxation

Ultrafast spin injection from Cd1−xMnxTe magnetic barriers into a CdTe quantum well studied by pump–probe spectroscopy

2006 ◽  
Vol 119-120 ◽  
pp. 437-441
Author(s):  
I. Aoshima ◽  
K. Nishibayashi ◽  
I. Souma ◽  
A. Murayama ◽  
Y. Oka
Keyword(s):  
Quantum Well ◽  
Spin Injection ◽  
Pump Probe ◽  
Probe Spectroscopy ◽  
Magnetic Barriers

scholarly journals Ultrafast Electron/Energy Transfer and Intersystem Crossing Mechanisms in BODIPY-Porphyrin Compounds

Processes ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 312
Author(s):  
Yusuf Tutel ◽  
Gökhan Sevinç ◽  
Betül Küçüköz ◽  
Elif Akhuseyin Yildiz ◽  
Ahmet Karatay ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Fluorescence Spectra ◽  
Visible Region ◽  
Energy Transfer Mechanism ◽  
Free Base ◽  
Pump Probe ◽  
Harvesting Efficiency ◽  
Probe Spectroscopy ◽  
Absorption Features ◽  
Transfer Mechanisms

Meso-substituted borondipyrromethene (BODIPY)-porphyrin compounds that include free base porphyrin with two different numbers of BODIPY groups (BDP-TTP and 3BDP-TTP) were designed and synthesized to analyze intramolecular energy transfer mechanisms of meso-substituted BODIPY-porphyrin dyads and the effect of the different numbers of BODIPY groups connected to free-base porphyrin on the energy transfer mechanism. Absorption spectra of BODIPY-porphyrin conjugates showed wide absorption features in the visible region, and that is highly valuable to increase light-harvesting efficiency. Fluorescence spectra of the studied compounds proved that BODIPY emission intensity decreased upon the photoexcitation of the BODIPY core, due to the energy transfer from BODIPY unit to porphyrin. In addition, ultrafast pump-probe spectroscopy measurements indicated that the energy transfer of the 3BDP-TTP compound (about 3 ps) is faster than the BDP-TTP compound (about 22 ps). Since the BODIPY core directly binds to the porphyrin unit, rapid energy transfer was seen for both compounds. Thus, the energy transfer rate increased with an increasing number of BODIPY moiety connected to free-base porphyrin.

Perturbative calculation of the ac Stark effect by the complex rotation method

1991 ◽  
Vol 43 (11) ◽  
pp. 6272-6283 ◽  
Author(s):  
Liwen Pan ◽  
K. T. Taylor ◽  
Charles W. Clark
Keyword(s):  
Stark Effect ◽  
Perturbative Calculation ◽  
Complex Rotation ◽  
Rotation Method ◽  
Ac Stark Effect

Electroabsorption by Stark effect on room‐temperature excitons in GaAs/GaAlAs multiple quantum well structures

1983 ◽  
Vol 42 (10) ◽  
pp. 864-866 ◽  
Author(s):  
D. S. Chemla ◽  
T. C. Damen ◽  
D. A. B. Miller ◽  
A. C. Gossard ◽  
W. Wiegmann
Keyword(s):  
Quantum Well ◽  
Room Temperature ◽  
Stark Effect ◽  
Multiple Quantum Well ◽  
Multiple Quantum ◽  
Quantum Well Structures

Classical theory of ultrafast pump-probe spectroscopy: Applications to I2 photodissociation in Ar solution

1994 ◽  
Vol 61 (1-3) ◽  
pp. 153-165 ◽  
Author(s):  
Robert M. Whitnell ◽  
Kent R. Wilson ◽  
YiJing Yan ◽  
Ahmed H. Zewail
Keyword(s):  
Classical Theory ◽  
Pump Probe ◽  
Probe Spectroscopy
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