Adiabatic Raman passage via two-photon resonant transitions in a five-level Λ system

Wang, Heng; Liu, Yi-Mou; Gao, Jinliang; Yan, Dong; Wang, Rong; Wu, Jin-Hui

doi:10.1016/j.optcom.2012.03.013

Cited by 5 publications

(2 citation statements)

References 25 publications

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“…This is done by setting the auxiliary and coupling fields to be far detuned from relevant transitions with a sufficiently large | | [35,36]. Then we may safely reduce the five-level quasi-system [ Fig.…”

Section: B Second-order Uv Pbgsmentioning

confidence: 99%

Tunable high-order photonic band gaps of ultraviolet light in cold atoms

et al. 2015

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We study a five-level quasi-system of cold atoms for achieving high-order photonic band gaps (PBGs) probed by an ultraviolet field in two cases where either an infrared or a visible control field works in the standing-wave configuration to induce one atomic grating. Transfer-matrix calculations for appropriate rubidium levels demonstrate that three fifth-order band gaps or two second-order band gaps can be generated near the probe resonance when the standing-wave control field is modulated to satisfy relevant Bragg conditions in the regime of electromagnetically induced transparency. These high-order PBGs, as characterized by homogeneous high reflectivities, can be dynamically tuned in positions and widths on demand and may be extended to develop efficient devices (like diodes and reflectors) for manipulating weak high-frequency light with strong low-frequency light.

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Section: B Second-order Uv Pbgsmentioning

confidence: 99%

Tunable high-order photonic band gaps of ultraviolet light in cold atoms

et al. 2015

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“…On the other hand, a multilevel structure is treated as another alternative approach to realize the atommolecule transfer, due to its high selectivity and controllability for the use of intermediate auxiliary levels [28][29][30][31][32][33][34][35][36][37][38][39][40][41]. The first extension to a complex multilevel STI-RAP case was proposed by B. W. Shore in 1991 [28], and then more and more attentions are paid to various multilevel schemes, such as the alternating STIRAP in which all the even transitions occur before the odd ones [28], the straddling STIRAP in which a set of intense pulses corresponding to all intermediate states spans both the Stokes and pump pulses [30,34], and the (m + n) STI-RAP which contains m-photon pump transitions and nphoton Stokes transitions [40].…”

Section: Introductionmentioning

confidence: 99%

Efficiency limitation for realizing an atom–molecule adiabatic transfer based on a chainwise system

Zhai

Zhang

et al. 2015

J. Opt. Soc. Am. B

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In a recent work we have developed a robust chainwise atom-molecule adiabatic passage scheme to produce ultracold ground-state molecules via photo-associating free atoms [J. Qian et.al. Phys. Rev. A 81 013632 (2010)]. With the help of intermediate auxiliary levels, the pump laser intensity requested in the atomic photo-association process can be greatly reduced. In the present work, we extend the scheme to a more generalized (2n+1)-level system and investigate the efficiency limitation for it. As the increase of intermediate levels and auxiliary lasers, the atom-molecule adiabatic passage would be gradually closed, leading to a poor transfer efficiency. For the purpose of enhancing the efficiency, we present various optimization approaches to the laser parameters, involving order number n, relative strength ratio and absolute strength. We show there can remain a limit on the population transfer efficiency given by a three-level Λ system. In addition, we illustrate the importance of selecting an appropriate number of intermediate levels for maintaining a highly efficient transfer under mild experimental conditions.

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