Physical Review A

Strong-field multifrequency electromagnetically induced transparency

Enrique Conejero Jarque, L. Roso

Published Dec 8, 2004• 1 citation

Abstract

Based on ab initio simulations of the interaction of the hydrogen atom with a multifrequency ultrashort laser pulse in the strong-field regime, coherent population trapping is found. It leads to the inhibition of the ionization process and, hence, electromagnetically induced transparency, provided that certain two-photon resonance conditions are satisfied. This effect opens additional possibilities to detect phase-locked trains of attosecond pulses.

DOI: 10.1103/physreva.70.063802

Related papers

Coherent population trapping and electromagnetically induced transparency in a five-levelM-type atom

Ying Gu, Lei Wang, Kai Wang +2 more

When two pairs of near-resonant laser fields interact with a five-level atom, forming an M geometry, coherent population trapping and electromagnetically induced transparency appear in the condition of the collaboration of two two-photon resonances. Moreover, in the five-level M -type atom, quantum switching based on two two-photon resonances is obtained.

Journal of Physics B Atomic Molecular and Optical PhysicsDec 28, 200518 citations

Autler–Townes doublet and electromagnetically induced transparency resonance probed by an ultrashort pulse train

Antônio Augusto Soares, Luı́s E. E. de Araujo

Journal of Physics B Atomic Molecular and Optical PhysicsApr 6, 20109 citations

Coherence induced by a train of ultrashort pulses in a Λ-type system

Marco Polo Moreno de Souza, S. S. Vianna

Journal of the Optical Society of America BApr 14, 201116 citations

Coherent population trapping and electromagnetically induced transparency in multi-Zeeman-sublevel atoms

Hong Yuan Ling, Yongqing Li, Min Xiao

Physical Review AFeb 1, 199695 citations

Controlling the XUV Transparency of Helium Using Two-Pathway Quantum Interference

Predrag Ranitovic, Xiao‐Min Tong, Craig Hogle +5 more

Physical Review LettersMay 13, 201167 citations

Self-induced transparency assisted by electromagnetically induced transparency

A. Nazarkin, R. Netz, Roland A. Sauerbrey

Physical Review AOct 31, 20061 citation

Physical Review A

Strong-field multifrequency electromagnetically induced transparency

Enrique Conejero Jarque, L. Roso

Published Dec 8, 2004• 1 citation

Publisher

Abstract

DOI: 10.1103/physreva.70.063802

Related papers

Coherent population trapping and electromagnetically induced transparency in a five-levelM-type atom

Ying Gu, Lei Wang, Kai Wang +2 more

Journal of Physics B Atomic Molecular and Optical PhysicsDec 28, 200518 citations

Autler–Townes doublet and electromagnetically induced transparency resonance probed by an ultrashort pulse train

Antônio Augusto Soares, Luı́s E. E. de Araujo

We study theoretically the interaction between an ultrashort pulse train and a three-level atom driven by a cw laser. We show that the pulse train can be employed to observe spectra of Autler–Townes doublet and electromagnetically induced transparency resonance that are time and frequency resolved. The observation of subnatural linewidth features associated with the electromagnetically induced transparency resonance is described. The temporal evolution of electromagnetically induced transparency of the pulse train is shown to exhibit new and different features compared to that of the related phenomenon of coherent population trapping. By matching the tooth separation of the frequency comb associated with the pulse train to that of the Autler–Townes doublet, quantum beats between the doublet components can be induced. We show that coherent accumulation of excitation plays a major role in the two studied phenomena.We study theoretically the interaction between an ultrashort pulse train and a three-level atom driven by a cw laser. We show that the pulse train can be employed to observe spectra of Autler–Townes doublet and electromagnetically induced transparency resonance that are time and frequency resolved. The observation of subnatural linewidth features associated with the electromagnetically induced transparency resonance is described. The temporal evolution of electromagnetically induced transparency of the pulse train is shown to exhibit new and different features compared to that of the related phenomenon of coherent population trapping. By matching the tooth separation of the frequency comb associated with the pulse train to that of the Autler–Townes doublet, quantum beats between the doublet components can be induced. We show that coherent accumulation of excitation plays a major role in the two studied phenomena.

Journal of Physics B Atomic Molecular and Optical PhysicsApr 6, 20109 citations

Coherence induced by a train of ultrashort pulses in a Λ-type system

Marco Polo Moreno de Souza, S. S. Vianna

We present an analysis of coherent population trapping in a three-level Λ system when excited by an ultrashort pulse train near the one- and two-photon resonances. Numerical results using Bloch equations give the transient response of the system and clearly reveal a comb of electromagnetically induced transparency (EIT) lines. An analytical solution to describe the EIT lines is derived in the steady-state regime and in the weak field limit. Moreover, numerical results indicate that selective velocity spectroscopy makes possible the observation of the comb of EIT lines in Doppler broadening media.We present an analysis of coherent population trapping in a three-level Λ system when excited by an ultrashort pulse train near the one- and two-photon resonances. Numerical results using Bloch equations give the transient response of the system and clearly reveal a comb of electromagnetically induced transparency (EIT) lines. An analytical solution to describe the EIT lines is derived in the steady-state regime and in the weak field limit. Moreover, numerical results indicate that selective velocity spectroscopy makes possible the observation of the comb of EIT lines in Doppler broadening media.

Journal of the Optical Society of America BApr 14, 201116 citations

Coherent population trapping and electromagnetically induced transparency in multi-Zeeman-sublevel atoms

Hong Yuan Ling, Yongqing Li, Min Xiao

We present a general formalism for studying the interaction between laser fields and degenerate-Zeeman-sublevel atoms correct up to the first order in the weak probe field. We derive from this theory the equations of motion for a \ensuremath{\Lambda}-type system involving ${\mathit{S}}_{1/2}$ , F=2\ensuremath{\leftrightarrows} ${\mathit{P}}_{1/2}$ , F\ensuremath{'}=1\ensuremath{\leftrightarrows} ${\mathit{S}}_{1/2}$ , F=1 transitions in $^{87}\mathrm{Rb}$ atoms. These equations are used to numerically investigate the coherent population trapping (CPT) schemes in the ${\mathit{S}}_{1/2}$ , F=2\ensuremath{\leftrightarrows} ${\mathit{P}}_{1/2}$ , F\ensuremath{'}=1 transition induced by a linearly polarized pumping field and the electromagnetically induced transparency exhibited in the weak probe spectrum in the ${\mathit{S}}_{1/2}$ , F=1\ensuremath{\leftrightarrows} ${\mathit{P}}_{1/2}$ , F\ensuremath{'}=1 transition. We discuss the effects of the CPT on the probe spectrum with and without the Doppler broadenings by comparing the probe spectrum derived from the real system with that derived from an ideal \ensuremath{\Lambda}-type system. We show that the atoms in the CPT states are shielded from interacting with the probe field while those in the absorbent states make contributions to the weak probe by the Raman anti-Stokes process, and the effect of the real system on the probe field becomes equivalent to the ideal \ensuremath{\Lambda} system only in the strong CPT parameter regime. \textcopyright{} 1996 The American Physical Society.We present a general formalism for studying the interaction between laser fields and degenerate-Zeeman-sublevel atoms correct up to the first order in the weak probe field. We derive from this theory the equations of motion for a \ensuremath{\Lambda}-type system involving ${\mathit{S}}_{1/2}$, F=2\ensuremath{\leftrightarrows}${\mathit{P}}_{1/2}$, F\ensuremath{'}=1\ensuremath{\leftrightarrows}${\mathit{S}}_{1/2}$, F=1 transitions in $^{87}\mathrm{Rb}$ atoms. These equations are used to numerically investigate the coherent population trapping (CPT) schemes in the ${\mathit{S}}_{1/2}$, F=2\ensuremath{\leftrightarrows}${\mathit{P}}_{1/2}$, F\ensuremath{'}=1 transition induced by a linearly polarized pumping field and the electromagnetically induced transparency exhibited in the weak probe spectrum in the ${\mathit{S}}_{1/2}$, F=1\ensuremath{\leftrightarrows}${\mathit{P}}_{1/2}$, F\ensuremath{'}=1 transition. We discuss the effects of the CPT on the probe spectrum with and without the Doppler broadenings by comparing the probe spectrum derived from the real system with that derived from an ideal \ensuremath{\Lambda}-type system. We show that the atoms in the CPT states are shielded from interacting with the probe field while those in the absorbent states make contributions to the weak probe by the Raman anti-Stokes process, and the effect of the real system on the probe field becomes equivalent to the ideal \ensuremath{\Lambda} system only in the strong CPT parameter regime. \textcopyright{} 1996 The American Physical Society.

Physical Review AFeb 1, 199695 citations

Controlling the XUV Transparency of Helium Using Two-Pathway Quantum Interference

Predrag Ranitovic, Xiao‐Min Tong, Craig Hogle +5 more

Atoms irradiated with combined femtosecond laser and extreme ultraviolet (XUV) fields ionize through multiphoton processes, even when the energy of the XUV photon is below the ionization potential. However, in the presence of two different XUV photons and an intense laser field, it is possible to induce full electromagnetic transparency. Taking helium as an example, the laser field modifies its electronic structure, while the presence of two different XUV photons and the laser field leads to two distinct ionization pathways that can interfere destructively. This work demonstrates a new approach for coherent control in a regime of highly excited states and strong optical fields.Atoms irradiated with combined femtosecond laser and extreme ultraviolet (XUV) fields ionize through multiphoton processes, even when the energy of the XUV photon is below the ionization potential. However, in the presence of two different XUV photons and an intense laser field, it is possible to induce full electromagnetic transparency. Taking helium as an example, the laser field modifies its electronic structure, while the presence of two different XUV photons and the laser field leads to two distinct ionization pathways that can interfere destructively. This work demonstrates a new approach for coherent control in a regime of highly excited states and strong optical fields.

Physical Review LettersMay 13, 201167 citations

Self-induced transparency assisted by electromagnetically induced transparency

A. Nazarkin, R. Netz, Roland A. Sauerbrey

We show the possibility of transparency and soliton effects for an intense pulse propagating in a $V$ -type medium in which two upper resonant sublevels experience fast field-induced decay due to incoherent coupling to an upper lying state or continuum. The transparency arises as a result of the combined action of population trapping on the sublevels leading to interference suppression of the relaxation channel, and coherent Rabi cycling induced by the laser field.We show the possibility of transparency and soliton effects for an intense pulse propagating in a $V$-type medium in which two upper resonant sublevels experience fast field-induced decay due to incoherent coupling to an upper lying state or continuum. The transparency arises as a result of the combined action of population trapping on the sublevels leading to interference suppression of the relaxation channel, and coherent Rabi cycling induced by the laser field.

Physical Review AOct 31, 20061 citation

{\mathit{S}}_{1/2}

, F=2\ensuremath{\leftrightarrows}

{\mathit{P}}_{1/2}

, F\ensuremath{'}=1\ensuremath{\leftrightarrows}

{\mathit{S}}_{1/2}

, F=1 transitions in

^{87}\mathrm{Rb}

atoms. These equations are used to numerically investigate the coherent population trapping (CPT) schemes in the

{\mathit{S}}_{1/2}

, F=2\ensuremath{\leftrightarrows}

{\mathit{P}}_{1/2}

, F\ensuremath{'}=1 transition induced by a linearly polarized pumping field and the electromagnetically induced transparency exhibited in the weak probe spectrum in the

{\mathit{S}}_{1/2}

, F=1\ensuremath{\leftrightarrows}

{\mathit{P}}_{1/2}

, F\ensuremath{'}=1 transition. We discuss the effects of the CPT on the probe spectrum with and without the Doppler broadenings by comparing the probe spectrum derived from the real system with that derived from an ideal \ensuremath{\Lambda}-type system. We show that the atoms in the CPT states are shielded from interacting with the probe field while those in the absorbent states make contributions to the weak probe by the Raman anti-Stokes process, and the effect of the real system on the probe field becomes equivalent to the ideal \ensuremath{\Lambda} system only in the strong CPT parameter regime. \textcopyright{} 1996 The American Physical Society.

We show the possibility of transparency and soliton effects for an intense pulse propagating in a

V

-type medium in which two upper resonant sublevels experience fast field-induced decay due to incoherent coupling to an upper lying state or continuum. The transparency arises as a result of the combined action of population trapping on the sublevels leading to interference suppression of the relaxation channel, and coherent Rabi cycling induced by the laser field.