Stimulated Raman adiabatic passage with small two-photon detunings and its geometrical description

2008 ◽  
Vol 372 (9) ◽  
pp. 1535-1540 ◽  
Author(s):  
Hayato Goto ◽  
Kouichi Ichimura
Keyword(s):  
Adiabatic Passage ◽  
Geometrical Description ◽  
Two Photon ◽  
Stimulated Raman Adiabatic Passage ◽  
Stimulated Raman

scholarly journals Stimulated Raman Adiabatic Passage in a Dense Medium

2010 ◽  
Vol 2010 ◽  
pp. 1-8 ◽  
Author(s):  
B. D. Fainberg ◽  
B. Levinsky
Keyword(s):  
Intermediate State ◽  
Control Process ◽  
Dense Medium ◽  
Adiabatic Passage ◽  
Two Photon ◽  
Direct Excitation ◽  
Stimulated Raman Adiabatic Passage ◽  
Chirped Pulses ◽  
Optical Region ◽  
Stimulated Raman

We have considered a coherent population transfer to a higher excited singlet state (S2) of molecules with anomalous fluorescence in molecular assemblies (e.g., a dense medium). A direct excitation to S2 requires light in the UV region. Because of this, the transition is conveniently realized by a two-step (two-photon) process: S0→S1→S2, where transitions S0→S1 and S1→S2 correspond to the optical region. We have shown that efficient stimulated Raman adiabatic passage (STIRAP) in the ladder configuration can be realized in this case, using suitably chirped pulses, to compensate a change of the two-photon transition frequency in time, induced by the pulses themselves, due to near dipole-dipole interactions. We have provided a reduced state formulation of the optical control process. Chirping the “pump” pulse that excites transition S0→S1 is nonequivalent to chirping the “Stokes” pulse that excites transition S1→S2, with respect to the population of the intermediate state (S1) in the pulse nonadiabatic regime. We have also shown that with suitably chirped pulses, efficient STIRAP still persists even for a rather large decay of the intermediate state.

Population Transfer in Multilevel System via Modified Stimulated Raman Adiabatic Passage

2014 ◽  
Vol 577 ◽  
pp. 112-115
Author(s):  
Xiao Qin Shu ◽  
Chi Deng ◽  
Ye Kuang ◽  
Jian Hui Yang ◽  
Yi Ding Liu
Keyword(s):  
Spontaneous Emission ◽  
Intermediate Level ◽  
Level Population ◽  
Population Transfer ◽  
Multilevel System ◽  
Adiabatic Passage ◽  
Stimulated Raman Adiabatic Passage ◽  
Novel Method ◽  
Stimulated Raman

During the STIRAP process, the intermediate levels will have notable population which is detrimental if these levels could decay to other levels through spontaneous emission. Here, we propose a novel method which could reduce the intermediate level population during the STIRAP process. A complete population transfer could be achieved in this modified STIRAP even if the intermediate level could decay to other levels.

scholarly journals Non-Hermitian shortcut to stimulated Raman adiabatic passage

2014 ◽  
Vol 89 (6) ◽  
Author(s):  
Boyan T. Torosov ◽  
Giuseppe Della Valle ◽  
Stefano Longhi
Keyword(s):  
Adiabatic Passage ◽  
Stimulated Raman Adiabatic Passage ◽  
Stimulated Raman
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