Adiabatic-following solutions for multisubband quantum wells excited by an ultrafast optical pump field

1992 ◽  
Vol 45 (20) ◽  
pp. 11918-11928 ◽  
Author(s):  
Leung Tsang ◽  
Chaiyuth Chansungsan ◽  
Shun L. Chuang
Keyword(s):  
Quantum Wells ◽  
Pump Field ◽  
Optical Pump ◽  
Ultrafast Optical

Intersubband emission and carrier dynamics in GaAs/AlGaAs tunnel-coupled quantum wells after ultrafast optical pumping

2007 ◽  
Author(s):  
Stefan Hanna ◽  
Wolfgang Silz ◽  
Vadim Yu. Panevin ◽  
Vadim A. Shalygin ◽  
Leonid E. Vorobjev ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Optical Pumping ◽  
Carrier Dynamics ◽  
Coupled Quantum Wells ◽  
Ultrafast Optical

Ultrafast optical-pump terahertz-probe spectroscopy of individual silicon nanowires

CLEO: 2013 ◽  
2013 ◽  
Author(s):  
Taeyong Kim ◽  
Sangwan Sim ◽  
Jungmok Seo ◽  
Jaehong Lee ◽  
Heetak Han ◽  
...  
Keyword(s):  
Silicon Nanowires ◽  
Optical Pump ◽  
Ultrafast Optical ◽  
Probe Spectroscopy

Ultrafast Optical Response and Transient Population Inversion of Photoexcited Ge/SiGe Quantum Wells

2010 ◽  
Author(s):  
Sangam Chatterjee ◽  
Christoph Lange ◽  
Niko S. Köster ◽  
Martin Schäfer ◽  
Mackillo Kira ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Population Inversion ◽  
Optical Response ◽  
Ultrafast Optical ◽  
Transient Population ◽  
Sige Quantum Wells

scholarly journals Understanding Multiferroic Hexagonal Manganites by Static and Ultrafast Optical Spectroscopy

2013 ◽  
Vol 2013 ◽  
pp. 1-13 ◽  
Author(s):  
Yu Ting Wang ◽  
Chih Wei Luo ◽  
Takayoshi Kobayashi
Keyword(s):  
Electronic Structure ◽  
Magnetic Ordering ◽  
Optical Pump ◽  
Pump Probe ◽  
Spin Lattice ◽  
Ultrafast Optical ◽  
Ultrafast Optical Spectroscopy ◽  
Hexagonal Manganites ◽  
Spin Charge Coupling ◽  
Probe Spectroscopy

Multiferroic hexagonal manganites ReMnO3studied by optics are reviewed. Their electronic structures were revealed by static linear and nonlinear spectra. Two transitions located at~1.7 eV and~2.3 eV have been observed and attributed to the interband transitions from the lower-lying Mn3+dxy/dx2-y2anddxz/dyzstates to the Mn3+d3z2-r2state, respectively. These so-called d-d transitions exhibit a blueshift as decreasing temperatures and an extra blueshift nearTN. This dramatic change indicates that the magnetic ordering seriously influences the electronic structure. On the other hand, the ultrafast optical pump-probe spectroscopy has provided the important information on spin-charge coupling and spin-lattice coupling. Because of the strongly correlation between electronic structure and magnetic ordering, the amplitude of the initial rising component inΔR/Rshows striking changes at the vicinity ofTN. Moreover, the coherent optical and acoustic phonons were observed on optical pump-probe spectroscopy. Both the amplitude and dephasing time of coherent phonons also exhibit significant changes atTN, which provide the evidence for spin-lattice interaction in these intriguing materials.

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