Physical Review A

Laser-induced Rabi-frequency quantum beats in superfluorescence

Ranjana Prakash, Naresh Chandra

Published Aug 1, 1981• 3 citations

Abstract

It is shown that in superfluorescence in the presence of an intense laser which resonates with the lower atomic state involved in the superfluorescence and some other atomic state, quantum beats of a modified Rabi frequency exist. Experiments for observation of these quantum beats are suggested.

DOI: 10.1103/physreva.24.962

Related papers

Observation and Origin of Multi-THz Quantum Beats in Superfluorescent Emission from Argon

Noa Nambu, Zan Nie, Kenneth A. Marsh +2 more

Observation of quantum beats in lasing signals in argon atoms pumped by a 3-photon resonance with an intense 260.5 nm laser were used to observe excitation of a “3ω-induced” state mediated by phase-matched third-harmonic photons.

Jan 1, 20250 citations

Quantum Beats in Superfluorescence and the Role of Superfluorescence Chirping in It

Ranjana Prakash, Naresh Chandra

A theory of quantum beats in superfluorescence is given which explains some of the recent experimental observations of Vrehen, Hickspoors, and Gibbs. Variations of this experiment and some new experiments are suggested which will throw more light on chirping in superfluorescence and will confirm the change in sign of Lamb shift due to cooperative effects in a highly excited assembly of atoms.

Physical Review LettersFeb 12, 19797 citations

Quantum Beats in Superfluorescence in Atomic Cesium

Quirin H. F. Vrehen, H. M. J. Hikspoors, H. M. Gibbs

Physical Review LettersApr 4, 1977110 citations

Quantum beat laser as a source of entangled radiation

Shahid Qamar, Fazal Ghafoor, Mark S. Hillery +1 more

Physical Review AJun 5, 200880 citations

Observation and origin of multi-THz quantum beats in superfluorescent emission from argon

Noa Nambu, Zan Nie, Kenneth A. Marsh +4 more

Physical Review AJan 27, 20251 citation

Interference-induced peak splitting in extreme ultraviolet superfluorescence

Ni Cui, Christoph H. Keitel, Mihai Macovei

We investigate the laser-induced quantum interference in extreme ultraviolet superfluorescence (SF) occurring in a dense gas of Λ-type helium atoms coupled by a coherent laser field in the visible region. Due to the constructive interatomic and intraatomic interferences, the SF can split in two pulses conveniently controlled by the gas density and intensity of the driving field, suggesting potential applications for pump-probe experiments.

arXiv:1208.5651Optics LettersFeb 12, 20134 citations

Physical Review A

Laser-induced Rabi-frequency quantum beats in superfluorescence

Ranjana Prakash, Naresh Chandra

Published Aug 1, 1981• 3 citations

Publisher

Abstract

DOI: 10.1103/physreva.24.962

Related papers

Observation and Origin of Multi-THz Quantum Beats in Superfluorescent Emission from Argon

Noa Nambu, Zan Nie, Kenneth A. Marsh +2 more

Jan 1, 20250 citations

Quantum Beats in Superfluorescence and the Role of Superfluorescence Chirping in It

Ranjana Prakash, Naresh Chandra

Physical Review LettersFeb 12, 19797 citations

Quantum Beats in Superfluorescence in Atomic Cesium

Quirin H. F. Vrehen, H. M. J. Hikspoors, H. M. Gibbs

Superfluorescence has been observed at 3 \ensuremath{\mu}m on the $7P$ -to- $7S$ transition in atomic cesium after 2-ns excitation of a $6S$ -to- $7P$ transition. Both in a magnetic field and in zero field, quantum beats have been observed. The beat frequencies correspond not only to initial-level splittings but also to combinations of initial- and final-level splittings. Superfluorescence beats are therefore basically different from single-atom quantum beats.Superfluorescence has been observed at 3 \ensuremath{\mu}m on the $7P$-to-$7S$ transition in atomic cesium after 2-ns excitation of a $6S$-to-$7P$ transition. Both in a magnetic field and in zero field, quantum beats have been observed. The beat frequencies correspond not only to initial-level splittings but also to combinations of initial- and final-level splittings. Superfluorescence beats are therefore basically different from single-atom quantum beats.

Physical Review LettersApr 4, 1977110 citations

Quantum beat laser as a source of entangled radiation

Shahid Qamar, Fazal Ghafoor, Mark S. Hillery +1 more

We consider a quantum beat laser [Scully and Zubairy, Phys. Rev. A 35 752 (1987)] as a source of entangled radiation. The system essentially consists of three-level atoms inside a doubly resonant cavity such that coherence is introduced by driving the upper two levels with a strong classical field of Rabi frequency $\ensuremath{\Omega}$. We study the dynamics of this system for different values of Rabi frequencies in the presence of cavity losses. It is shown that entanglement can be generated in this system for different initial states of the field in the two modes.We consider a quantum beat laser [Scully and Zubairy, Phys. Rev. A 35 752 (1987)] as a source of entangled radiation. The system essentially consists of three-level atoms inside a doubly resonant cavity such that coherence is introduced by driving the upper two levels with a strong classical field of Rabi frequency $\ensuremath{\Omega}$. We study the dynamics of this system for different values of Rabi frequencies in the presence of cavity losses. It is shown that entanglement can be generated in this system for different initial states of the field in the two modes.

Physical Review AJun 5, 200880 citations

Observation and origin of multi-THz quantum beats in superfluorescent emission from argon

Noa Nambu, Zan Nie, Kenneth A. Marsh +4 more

We report observation of multi-THz quantum beats in the amplitude of superfluorescence in pure argon gas, using a time delayed 780-nm probe beam that interrogates the relevant population densities. The superfluorescence is induced by three-photon absorption of an ultrashort 260.5-nm laser pulse that creates coherent and coupled populations in multiple closely spaced $3d$ and $5s$ Ar levels. Argon pressure and pump laser focusing parameters are seen to modify the frequency of the quantum beats, which is attributed to the absorption of the self-generated, nonresonant third harmonic of the pump from Ar near the zero of the real part of the overlapping linear susceptibilities of the closely spaced $3d$ and $5s$ excited states. The self-absorption of the phase-matched THG photons creates a coherent population of atoms which acts like an atomic excited state ($3\ensuremath{\omega}$-induced state). We have also observed a new two-step superfluorescent cascade that results from the population redistribution enabled by the 780-nm probe pulse between the $3{d}^{\ensuremath{'}}{[5/2]}_{3}$ and the $3\ensuremath{\omega}$-induced state and gives rise to a previously unknown transition that emits on 1587 nm.We report observation of multi-THz quantum beats in the amplitude of superfluorescence in pure argon gas, using a time delayed 780-nm probe beam that interrogates the relevant population densities. The superfluorescence is induced by three-photon absorption of an ultrashort 260.5-nm laser pulse that creates coherent and coupled populations in multiple closely spaced $3d$ and $5s$ Ar levels. Argon pressure and pump laser focusing parameters are seen to modify the frequency of the quantum beats, which is attributed to the absorption of the self-generated, nonresonant third harmonic of the pump from Ar near the zero of the real part of the overlapping linear susceptibilities of the closely spaced $3d$ and $5s$ excited states. The self-absorption of the phase-matched THG photons creates a coherent population of atoms which acts like an atomic excited state ($3\ensuremath{\omega}$-induced state). We have also observed a new two-step superfluorescent cascade that results from the population redistribution enabled by the 780-nm probe pulse between the $3{d}^{\ensuremath{'}}{[5/2]}_{3}$ and the $3\ensuremath{\omega}$-induced state and gives rise to a previously unknown transition that emits on 1587 nm.

Physical Review AJan 27, 20251 citation

Interference-induced peak splitting in extreme ultraviolet superfluorescence

Ni Cui, Christoph H. Keitel, Mihai Macovei

arXiv:1208.5651Optics LettersFeb 12, 20134 citations

Superfluorescence has been observed at 3 \ensuremath{\mu}m on the

7P

-to-

7S

transition in atomic cesium after 2-ns excitation of a

6S

-to-

7P

transition. Both in a magnetic field and in zero field, quantum beats have been observed. The beat frequencies correspond not only to initial-level splittings but also to combinations of initial- and final-level splittings. Superfluorescence beats are therefore basically different from single-atom quantum beats.

3d

and

5s

Ar levels. Argon pressure and pump laser focusing parameters are seen to modify the frequency of the quantum beats, which is attributed to the absorption of the self-generated, nonresonant third harmonic of the pump from Ar near the zero of the real part of the overlapping linear susceptibilities of the closely spaced

3d

and

5s

excited states. The self-absorption of the phase-matched THG photons creates a coherent population of atoms which acts like an atomic excited state ($3\ensuremath{\omega}$-induced state). We have also observed a new two-step superfluorescent cascade that results from the population redistribution enabled by the 780-nm probe pulse between the $3{d}^{\ensuremath{'}}{[5/2]}_{3}$ and the $3\ensuremath{\omega}$-induced state and gives rise to a previously unknown transition that emits on 1587 nm.