Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Conference on Lasers and Electro-Optics

Two-photon laser

P. E. Toschek, B. Nikolaus

Published Jan 1, 1982• 0 citations
Publisher

Abstract

With the general n-photon interaction of atoms (molecules) and light, the energy W = ∑ i ∑ n l ℏ ω i n l ( with n = ∑ n l | n l | ) is exchanged, if there is resonance W =ħω0 with a term difference ω0 of the particles. This process provides for gain if an emittive step (any n k < 0) is involved. Aside from single-photon emission, stimulated Raman emission (ω1–ω2 = ω0) is the basis for light sources of unique characteristics.

DOI
10.1364/cleo.1982.thb1

Related papers

Two types of cooperation between the photons in multiple scattering lasing and their possible application

N. A. Enaki

The two types of cooperative effects between the converted photons in the multiple steps of Raman lasing are proposed. The first type involves the cooperative process between the photons of one of the steps of Raman conversion. The second cooperative effect appears between the photons belonging to different steps of multiple conversions. This new type of generated coherent state is proposed by novel bimodal entangled sources, which take into consideration both the coherence and collective phenomena between the photons belonging to the system of the bimodal field obtained in multiple Raman emissions. For this, the creation and annihilation operators of the new resonator quasi-particle ware introduced taking into consideration the Hilbert space of field vectors at frequency differences, ωp+1−ωp between the anti-Stokes components of multiple Raman lasing. The application of higher-order multiple Roman bimodal coherent field quantum information is described in accordance with the definition of quantum amplitude and phase of such entangled states of light. The cooperative properties of the bimodal field in the multiple scattering processes of Raman lasing in the cavity/fiber and its interaction with ensemble of atoms prepared in coherent state are proposed. We introduced the new characteristics of bi-modes field in which the multiple Raman scattering takes into consideration the interaction with coherent excitation and non-stationary quantum fluctuations of the generation rate of the introduced quasi particles. Here, we represent the rate moments through the annihilation and generation operators of the cavity quasi-parties.

Physics Open•Jul 31, 2024•1 citation

Electromagnetically enhanced two-photon gain and absorption

Daniel J. Gauthier

Recent research has shown that the interaction between an atom and an electromagnetic field can be modified favorably by illuminating the atom by an intense, auxiliary laser field.

Annual Meeting Optical Society of America•Jan 1, 1993•0 citations

Quantum emitters

Lukáš Novotný, Bert Hecht

The interaction of light with nanoscale structures is at the core of nano-optics. As the structures become smaller and smaller the laws of quantum mechanics will become apparent. In this limit, the discrete nature of atomic states gives rise to resonant light-matter interactions. In atoms, molecules, and nanoparticles, such as semiconductor nanocrystals and other “quantum confined” systems, these resonances occur when the photon energy matches the energy difference of discrete internal (electronic) energy levels. Owing to the resonant character, light-matter interaction can often be approximated by treating these quantum emitters as effective two-level systems, i.e. by considering only those two (electronic) levels whose difference in energy is close to the interacting photon energy ħω 0 . In this chapter we discuss quantum emitters that are used in optical experiments. We will discuss their use as single-photon sources and analyze their photon statistics. While the radiative properties of quantum emitters have been discussed in Chapter 8, this chapter focuses on the properties of the quantum emitters themselves. We adopt a rather practical perspective since more detailed accounts can be found elsewhere (see e.g. [1–4]). Types of quantum emitters The possibility of detecting single quantum emitters optically relies mostly on the fact that redshifted emission can be very efficiently discriminated against excitation light [5, 6]. This opens the road for experiments in which the properties of these emitters are studied or in which they are used as discrete light sources.

Cambridge University Press eBooks•Sep 6, 2012•2 citations

Two-photon excitation in atoms and molecules

Richard E. Wallenstein

Optics Communications•Jul 1, 1976•12 citations

DESTRUCTIVE INTERFERENCE BETWEEN PARAMETRIC FOUR-WAVE MIXING AND THREE-PHOTON SCATTERING

Yaakov Shevy, M. Rosenbluh

The propagation of a nearly resonant strong laser in Na vapor results in a number of non-linear optical processes such as parametric four-wave mixing (FWM), three-photon scattering (TPS), and Raman scattering.1 The Raman and TPS processes involve the emission of radiation at specific and unique frequencies determined by the detuning of the laser from the atomic resonance, δ, and the Rabi frequency, Ω. Parametric FWM, however, need only satisfy the condition that 2ωL = ω3+ ω4, and can occur over a broad range of frequencies. The frequency range is restricted only by the available gain for the FWM process. The gain depends strongly on the possibility of phase matching at the given frequencies involved in the interaction, as well as on nearly all of the experimental parameters such as relaxation rates (collisional and otherwise), Rabi frequencies, laser detuning, the length of the Na interaction region and the Na vapor pressure.

•Jul 18, 1988•0 citations

Resonance multiphoton processes of laser radiation interaction with atoms and molecules

Mikhail Vladimirovich Fedorov

•Jan 1, 1979•0 citations
With the general n-photon interaction of atoms (molecules) and light, the energy W = ∑ i ∑ n l ℏ ω i n l ( with n = ∑ n l | n l | ) is exchanged, if there is resonance W =ħω0 with a term difference ω0 of the particles. This process provides for gain if an emittive step (any n k < 0) is involved. Aside from single-photon emission, stimulated Raman emission (ω1–ω2 = ω0) is the basis for light sources of unique characteristics.
The two types of cooperative effects between the converted photons in the multiple steps of Raman lasing are proposed. The first type involves the cooperative process between the photons of one of the steps of Raman conversion. The second cooperative effect appears between the photons belonging to different steps of multiple conversions. This new type of generated coherent state is proposed by novel bimodal entangled sources, which take into consideration both the coherence and collective phenomena between the photons belonging to the system of the bimodal field obtained in multiple Raman emissions. For this, the creation and annihilation operators of the new resonator quasi-particle ware introduced taking into consideration the Hilbert space of field vectors at frequency differences, ωp+1−ωp between the anti-Stokes components of multiple Raman lasing. The application of higher-order multiple Roman bimodal coherent field quantum information is described in accordance with the definition of quantum amplitude and phase of such entangled states of light. The cooperative properties of the bimodal field in the multiple scattering processes of Raman lasing in the cavity/fiber and its interaction with ensemble of atoms prepared in coherent state are proposed. We introduced the new characteristics of bi-modes field in which the multiple Raman scattering takes into consideration the interaction with coherent excitation and non-stationary quantum fluctuations of the generation rate of the introduced quasi particles. Here, we represent the rate moments through the annihilation and generation operators of the cavity quasi-parties.
The interaction of light with nanoscale structures is at the core of nano-optics. As the structures become smaller and smaller the laws of quantum mechanics will become apparent. In this limit, the discrete nature of atomic states gives rise to resonant light-matter interactions. In atoms, molecules, and nanoparticles, such as semiconductor nanocrystals and other “quantum confined” systems, these resonances occur when the photon energy matches the energy difference of discrete internal (electronic) energy levels. Owing to the resonant character, light-matter interaction can often be approximated by treating these quantum emitters as effective two-level systems, i.e. by considering only those two (electronic) levels whose difference in energy is close to the interacting photon energy ħω 0 . In this chapter we discuss quantum emitters that are used in optical experiments. We will discuss their use as single-photon sources and analyze their photon statistics. While the radiative properties of quantum emitters have been discussed in Chapter 8, this chapter focuses on the properties of the quantum emitters themselves. We adopt a rather practical perspective since more detailed accounts can be found elsewhere (see e.g. [1–4]). Types of quantum emitters The possibility of detecting single quantum emitters optically relies mostly on the fact that redshifted emission can be very efficiently discriminated against excitation light [5, 6]. This opens the road for experiments in which the properties of these emitters are studied or in which they are used as discrete light sources.
The propagation of a nearly resonant strong laser in Na vapor results in a number of non-linear optical processes such as parametric four-wave mixing (FWM), three-photon scattering (TPS), and Raman scattering.1 The Raman and TPS processes involve the emission of radiation at specific and unique frequencies determined by the detuning of the laser from the atomic resonance, δ, and the Rabi frequency, Ω. Parametric FWM, however, need only satisfy the condition that 2ωL = ω3+ ω4, and can occur over a broad range of frequencies. The frequency range is restricted only by the available gain for the FWM process. The gain depends strongly on the possibility of phase matching at the given frequencies involved in the interaction, as well as on nearly all of the experimental parameters such as relaxation rates (collisional and otherwise), Rabi frequencies, laser detuning, the length of the Na interaction region and the Na vapor pressure.