Self-induced ac Stark shift in lasers

Gil, Lionel; Lippi, G. L.

doi:10.1103/physreva.83.043840

Cited by 9 publications

(19 citation statements)

References 49 publications

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“…[34][35][36] Indeed, in all the cases considered in this work, we find that only one of the three harmonic amplitudes is significant in our simulations, which validates the use of the RWA when a priori knowledge of the state energies exists.…”

Section: Steady-state Solutionsupporting

confidence: 54%

Extended density-matrix model applied to silicon-based terahertz quantum cascade lasers

et al. 2012

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Silicon-based terahertz quantum cascade lasers (QCLs) offer potential advantages over existing III-V devices. Although coherent electron transport effects are known to be important in QCLs, they have never been considered in Si-based device designs. We describe a density matrix transport model that is designed to be more general than those in previous studies and to require less a priori knowlege of electronic bandstructure, allowing its use in semi-automated design procedures. The basis of the model includes all states involved in interperiod transport, and our steady-state solution extends beyond the rotating-wave approximation by including DC and counter-propagating terms. We simulate the potential performance of bound-to-continuum Ge/SiGe QCLs and find that devices with 4-5-nm-thick barriers give the highest simulated optical gain. We also examine the effects of interdiffusion between Ge and SiGe layers; we show that if it is taken into account in the design, interdiffusion lengths of up to 1.5 nm do not significantly affect the simulated device performance.

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Section: Steady-state Solutionsupporting

confidence: 54%

Extended density-matrix model applied to silicon-based terahertz quantum cascade lasers

et al. 2012

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“…In the present work, the DSS of the 3 R 1 state of CH 3 I by a picosecond duration, near infrared intense laser pulse is studied. The B absorption band of CH 3 I consists of a discrete set of lifetime broadened peaks that correspond to different vibrational levels of the 3 R 1 state.…”

Section: Introductionmentioning

confidence: 99%

“…Typically, the intensities that can be achieved in this manner are significantly higher than with dc fields. Dynamic Stark shift (DSS) has a measurable effect on biological systems [1] [2] and laser generation itself [3] or the control of chemical reaction dynamics [4], among other applications.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Stark shift of the³R₁Rydberg state of CH₃I

Balerdi

Corrales

Gitzinger

et al. 2013

EPJ Web of Conferences

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Abstract. Stark shift of the 3 R 1 Rydberg state of CH 3 I is measured for different Stark field intensities. Photodissociation products, generated after predissociation of the state, were detected when the molecules were excited with photons resonant with the energy difference between the ground and the shifted 3 R 1 state, allowing the shift to be quantified. Qualitative agreement has been found with a 1D model.

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“…While the present discussion renders the difference between the two situations perfectly clear, confusion has recently surfaced when a paper describing the determination of isotope ratios using Four-WaveMixing spectroscopical methods [2] cited the self-induced frequency shift in a laser [3] as a source for the description of the level displacement. A possible origin for this confusion lies in the title chosen in [3] which identifies the level shift under the name of ac Stark shift.…”

mentioning

confidence: 93%

“…A possible origin for this confusion lies in the title chosen in [3] which identifies the level shift under the name of ac Stark shift. This choice rested on the intention of clearly showing the quantummechanical origin of the self-induced frequency shift.…”

mentioning

confidence: 98%