Chirped pulse control of long range electron transfer

Fainberg, B. D.; Горбунов, В.А.; Lin, Sheng Hsien

doi:10.1016/j.chemphys.2004.07.049

Cited by 9 publications

(7 citation statements)

References 56 publications

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“…One finds for the case under consideration where $\omega _{i} = E_{i} /\hbar ,\;\omega _{r} = \omega _{i} - r\omega ,\;{\hat {c}}_{i}^{r} = {\hat {c}}_{i} J_{r} (z_{i} ),\;J_{r} (z_{i} )$ , is the r th‐order Bessel function. This expansion can be extended to exciting a molecular bridge by pulsed, rather than continuous wave (CW) light, $E(t) = E_{0} (t)\,{\cos} \,\omega t$ (whose pulse duration is long with respect to the optical cycle 10). In that case the interaction parameter, defined above, $z_{i} (t) = {\bf D}_{ii} \cdot {\bf E}_{0} (t)/(\hbar \omega ),$ acquires a time dependence.…”

Section: Theorymentioning

confidence: 99%

Photoinduced current in molecular conduction junctions with semiconductor contacts

Fainberg

Seideman

2012

Physica Status Solidi (a)

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We propose a new approach to coherent control of transport via molecular junctions, which bypasses several of the hurdles to experimental realization of optically manipulated nanoelectronics noted in the previous literature. The method is based on the application of intrinsic semiconductor contacts and optical frequencies below the semiconductor bandgap. It relies on a simple and general concept, namely the controllable photonic replication of molecular levels through the dipole driving the molecular bridge by an electromagnetic field. We predict the effect of coherent destruction of induced tunneling that extends the certain effect of coherent destruction of tunneling. Our results illustrate the potential of semiconductor contacts in coherent control of photocurrent.

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Section: Theorymentioning

confidence: 99%

Photoinduced current in molecular conduction junctions with semiconductor contacts

Fainberg

Seideman

2012

Physica Status Solidi (a)

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“…Hence, the main source of relaxation in SC-molecule-SC junctions under the conditions considered is the charge transfer between the bridge and the contacts. The interaction of a nonresonant EM field with such systems leads to modulation of their energetic spectrum by the field frequency ω [18,19,21]. The efficiency of the energy spectrum modulation depends on the interaction parameter z = D · E 0 /(hω), where E 0 is the amplitude of the electromagnetic field E(t).…”

Section: Introductionmentioning

confidence: 99%

Photon assisted current in molecular nanojunctions with novel types of contacts

Fainberg¹

2014

AIP Conference Proceedings

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We propose new approaches to coherent control of transport via molecular junctions, which bypasses several of the hurdles to experimental realization of optically manipulated nanoelectronics noted in the previous literature. The first method is based on the application of intrinsic semiconductor contacts and optical frequencies below the semiconductor bandgap. Our analytical theory predicts a new phenomenon, referred to as coherent destruction of induced tunnelling, which extends the phenomenon of coherent destruction of tunnelling frequently discussed in the previous literature. We also propose to use graphene electrodes as a platform for effective photon assisted tunneling through molecular conduction nanojunctions. We predict dramatic increasing currents evaluated at side-band energies ∼ nhω (n is a whole number) related to the modification of graphene gapless spectrum under the action of external electromagnetic field of frequency ω. Our results illustrate the potential of semiconductor and graphene contacts in coherent control of photocurrent.

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“…It is worthy to note that the "partial relaxation" model offers a particular advantage over the total model. The point is that the first can be derived not assuming the standard adiabatic elimination of the momentum p for the non-diagonal density matrix [41], which is incorrect in the "slow modulation" limit [42]. This issue is quite important in the light of the limits imposed on Eqs.…”

Section: Semiclassical (Lax) Approximationmentioning

confidence: 99%

“…on the right-hand side of the corresponding equation for the nondiagonal element of the density matrix [26,40,12,41] that describes relaxation (diffusion) ofρ ij (x, t) (Eqs. (6) and (8)).…”

Section: Semiclassical (Lax) Approximationmentioning

confidence: 99%

Adiabatic Passage in a Three-State System with Non-Markovian Relaxation: The Role of Excited-State Absorption and Two-Exciton Processes

Fainberg

Горбунов

2007

J. Phys. Chem. A

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The influence of excited-state absorption (ESA) and two-exciton processes on a coherent population transfer with intense ultrashort chirped pulses in molecular systems in solution has been studied. An unified treatment of adiabatic rapid passage (ARP) in such systems has been developed using a three-state electronic system with relaxation treated as a diffusion on electronic potential energy surfaces. We have shown that ESA has a profound effect on coherent population transfer in large molecules that * Corresponding author. E-mail: fainberg@hit.ac.il 1 necessitates a more accurate interpretation of experimental data. A simple and physically clear model for ARP in molecules with three electronic states in solution has been developed by extending the Landau-Zener calculations putting in a third level to random crossing of levels. A method for quantum control of two-exciton states in molecular complexes has been proposed.

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Chirped pulse control of long range electron transfer

Cited by 9 publications

References 56 publications

Photoinduced current in molecular conduction junctions with semiconductor contacts

Photoinduced current in molecular conduction junctions with semiconductor contacts

Photon assisted current in molecular nanojunctions with novel types of contacts

Adiabatic Passage in a Three-State System with Non-Markovian Relaxation: The Role of Excited-State Absorption and Two-Exciton Processes

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