Many-Body Dipole-Dipole Interactions between Excited Rb Atoms Probed by Wave Packets and Parametric Four-Wave Mixing

2007 ◽  
Vol 99 (14) ◽  
Author(s):  
F. Shen ◽  
J. Gao ◽  
A. A. Senin ◽  
C. J. Zhu ◽  
J. R. Allen ◽  
...  
Keyword(s):  
Wave Packets ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Many Body ◽  
Dipole Interactions

scholarly journals Four-wave mixing of solitons with radiation and quasi-nondispersive wave packets at the short-wavelength edge of a supercontinuum

2006 ◽  
Vol 14 (21) ◽  
pp. 9854 ◽  
Author(s):  
A.V. Gorbach ◽  
D.V. Skryabin ◽  
J.M. Stone ◽  
J.C. Knight
Keyword(s):  
Short Wavelength ◽  
Wave Packets ◽  
Four Wave Mixing ◽  
Wave Mixing

scholarly journals Parametric amplification of optical phonons

2018 ◽  
Vol 115 (48) ◽  
pp. 12148-12151 ◽  
Author(s):  
A. Cartella ◽  
T. F. Nova ◽  
M. Fechner ◽  
R. Merlin ◽  
A. Cavalleri
Keyword(s):  
Density Functional ◽  
Optical Gain ◽  
Density Functional Theory Calculations ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Many Body ◽  
Microscopic Mechanism ◽  
Lattice Mode ◽  
Many Body Interactions ◽  
Kinetics Of

We use coherent midinfrared optical pulses to resonantly excite large-amplitude oscillations of the Si–C stretching mode in silicon carbide. When probing the sample with a second pulse, we observe parametric optical gain at all wavelengths throughout the reststrahlen band. This effect reflects the amplification of light by phonon-mediated four-wave mixing and, by extension, of optical-phonon fluctuations. Density functional theory calculations clarify aspects of the microscopic mechanism for this phenomenon. The high-frequency dielectric permittivity and the phonon oscillator strength depend quadratically on the lattice coordinate; they oscillate at twice the frequency of the optical field and provide a parametric drive for the lattice mode. Parametric gain in phononic four-wave mixing is a generic mechanism that can be extended to all polar modes of solids, as a means to control the kinetics of phase transitions, to amplify many-body interactions or to control phonon-polariton waves.

Dynamics of free electron wave packets with coherent extreme ultraviolet four-wave mixing fields

Optik ◽  
2021 ◽  
Vol 225 ◽  
pp. 165833
Author(s):  
Khoa Anh Tran ◽  
Khuong Ba Dinh ◽  
Thong Huy Chau ◽  
Peter Hannaford ◽  
Lap Van Dao
Keyword(s):  
Free Electron ◽  
Extreme Ultraviolet ◽  
Wave Packets ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Electron Wave

Pulse propagation and many-body effects in semiconductor four-wave mixing

1995 ◽  
Vol 51 (16) ◽  
pp. 10601-10609 ◽  
Author(s):  
A. Schulze ◽  
A. Knorr ◽  
S. W. Koch
Keyword(s):  
Pulse Propagation ◽  
Four Wave Mixing ◽  
Wave Mixing ◽  
Many Body ◽  
Many Body Effects

Study on Coherent Dynamics of Alkali Metal Atomic Wave Packets

2013 ◽  
Vol 538 ◽  
pp. 285-288
Author(s):  
Chang Jun Zhu ◽  
Jun Fang He
Keyword(s):  
Fourier Transform ◽  
Alkali Metal ◽  
Wave Packets ◽  
Energy Levels ◽  
Four Wave Mixing ◽  
Quantum Beats ◽  
Wave Mixing ◽  
Mixing Processes ◽  
Information Encoding ◽  
Atomic Wave

A theoretical model consisting of 5 energy levels, with the three upper states coherently excited, was proposed to analyze the coherent characteristics of atomic wave packets using perturbative theory. Pump-probe technique was implemented to detect coupled difference frequency four-wave mixing processes for studying the coherent characteristics of Rb atomic wave packets. Quantum beats were extracted the time domain signal by Fourier transform. Moreover, the variation of quantum beats was gained by time-dependent Fourier transform. The results show that the coherent characteristics of alkali metal atomic wave packets are closely related to quantum beats embedded in the time delayed four-wave mixing signal. Theoretical results are consistent with experimental observations, possessing potential applications in multi-channel information encoding and decoding.

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