2004/03/31 by Jinshuang Jin, Xin-Qi Li
Physics and Astronomy · #Condensed matter physics #Electron #Laser #Magnetic field #Physics #Quantum #Quantum and electron transport phenomena #Quantum decoherence #Quantum mechanics #Quantum optics and atomic interactions #Quantum well #Relaxation (psychology) #Semiconductor Quantum Structures and Devices #Spin (aerodynamics) #Spins #Ultrashort pulse #cond-mat.mes-hall
paper · pdf · doi:10.1063/1.2140868
published as J. Appl. Phys. 98, 123515 (2005) · 7pages, 5 figures, final version as published
openalex publication_date 2005/12/15 · arxiv created 2006/02/08 · arxiv updated 2015/06/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Based on a multiparticle-state stimulated Raman adiabatic passage approach, a comprehensive theoretical study of the ultrafast optical manipulation of electron spins in quantum wells is presented. In addition to corroborating experimental findings [Gupta et al., Science 292, 2458 (2001)], we improve the expression for the optical-pulse-induced effective magnetic field, in comparison with the one obtained via the conventional single-particle ac Stark shift. Further study of the effect of hole-spin relaxation reveals that, while the coherent optical manipulation of electron spin in undoped quantum wells would deteriorate in the presence of relatively fast hole-spin relaxation, the coherent control in doped systems can be quite robust against decoherence. The implications of the present results on quantum dots will also be discussed.