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

Journal of Optics B Quantum and Semiclassical Optics

Spontaneous emission through heavy photon bands

Vassilios Yannopapas

Published Apr 27, 2004• 9 citations
Publisher

Abstract

We examine the spontaneous emission spectrum of a Λ-type three-level atom embedded in a coupled-resonator optical waveguide. Owing to the high degree of confinement of light within the resonators, the waveguide modes can be obtained in the framework of an electromagnetic tight-binding theory. The corresponding density of modes exhibits singularities at the band edges leading to interesting features in the spontaneous emission spectrum such as dark lines and narrow emission peaks. The position and the shape of these features depend strongly on the geometry and refractive index of the waveguide.

DOI
10.1088/1464-4266/6/7/004

Related papers

Spontaneous emission spectrum from a V-type three-level atom in a double-band photonic crystal

Han Zhuang Zhang, Sing Hai Tang, Po Dong +1 more

The spontaneous emission spectrum from a V-type three-level atom embedded in a double-band photonic band gap (PBG) material has been investigated for the first time. Most interestingly it is shown that there is not only a black dark line, but also a narrow spontaneous line near the edges of the double photonic band. The positions of the dark line and narrow spontaneous line are near the transition from an empty upper level to a lower level. The lines stem from destructive and constructive quantum interferences, which induce population transfer between the two upper levels, in the PBG reservoirs. The effects of system parameters on the interference have been discussed in detail.

Journal of Optics B Quantum and Semiclassical Optics•Aug 12, 2002•14 citations

SPONTANEOUS EMISSION SPECTRUM FROM A DRIVEN THREE- LEVEL ATOM IN A DOUBLE-BAND PHOTONIC CRYSTAL

Samad Roshan Entezar, H Tajali

The spontaneous emission spectrum from a driven three-level atom placed inside a double-band photonic crystal has been investigated. We use the model which assumes the upper levels of the atomic transition are coupled via a classical driving field. The transition from one of the upper levels to lower level couples to the modes of the modified reservoir, and the transition from the other upper level to lower level interactwith the free vacuum modes. The effect of classical driving field on the spontaneous emission spectrum of this latter transition is investigated in detail. Most interestingly it is shown that only in the presence of the classical driving field; there is a black dark line in the spontaneous emission spectrum of free-space transition when the modified reservoir is of the photonic band gap type. This dark line is not seen in the case where the modified reservoir is of the free space type for relatively weak driving field.

•Jan 1, 2006•1 citation

Spontaneous emission interference in negative-refractive-index waveguides

Gao‐xiang Li, Jörg Evers, Christoph H. Keitel

The spontaneous decay of a $V$-type three-level atom placed in a negative-refractive-index waveguide is analyzed. We find that in thin waveguides, highly efficient surface-guided modes are supported, which do not occur in positive-index waveguides. In addition, at low absorption, the mode density and thus spontaneous emission into particular regular-guided modes is enhanced by several orders of magnitude as compared to regular dielectric waveguides. The asymmetries between emission into the different modes and the enhancement of particular guided modes allow us to induce strong spontaneous emission interference between transitions with orthogonal transition dipole moments.

arXiv:0902.2890•Physical Review B•Jul 2, 2009•59 citations

Spontaneous emission spectrum of a three-level atom embedded in photonic crystal

Liu Guo-Qiang, Jian Wang, Hanzhuang Zhang

The two models of three-level (one upper level and two lower levels, or two upper levels and one lower level) atom embedded in a double-band photonic crystal are adopted. The atomic transitions from the upper levels to the lower levels are assumed to be coupled by the same reservoir which are respectively the isotropic photonic band gap (PBG) modes, the anisotropic PBG modes and the free vacuum modes. The effects of the fine structure of the atomic ground state levels in the model with one upper level and two lower levels and the quantum interferences in the model with two upper levels and one lower level on the spontaneous emission spectrum of an atom are investigated in detail. Most interestingly, it is shown that new spontaneous emission lines are produced from the fine splitting of atomic ground state levels in the isotropic PBG case. The quantum interferences induce additional narrow spontaneous lines near the transition from the empty upper level to the lower level.

Chinese Physics•Dec 23, 2004•6 citations

Quantum interference in spontaneous emission of an atom embedded in a double-band photonic crystal

Han Zhuang Zhang, Sing Hai Tang, Po Dong +1 more

Quantum interferences in spontaneous emission spectrum from a V-type three-level and a double V-type four-level atom embedded in a double-band photonic band-gap material have been investigated. We demonstrate that there is not only a black dark line, but also a narrow spontaneous line in the spectrum. The dark line results from a destructive interference or singularities of the density of states of the radiation field. The narrow spectral line arises from a population transfer under joint constructive interferences. The spontaneous emission spectrum is compared to the cases of single-band and double-band photonic band-gap reservoirs.

Physical Review A•May 29, 2002•54 citations

Spontaneous Emission in a Cylindrical Waveguide

Silvia Casulleras

In this work we study the spontaneous emission of a two-level atom placed inside a hollow cylindrical waveguide of infinite length and with perfectly electric conducting walls. The atom, whose electric dipole moment is assumed to be oriented along the symmetry axis of the waveguide, couples to a photonic band structure with a non-linear dispersion relation. We address two different regimes of coupling between the atom and the photonic band structure. In particular, we refer to the regime where the internal frequency of the a.tom is close to a band edge as the strong coupling regime and to the regime where the internal frequency is far from a band edge as the weak coupling regime. In the weak coupling regime, we find that the a.tom decays exponentially with a modified decayed rate due to the presence of the waveguide, and that the line-shape of the emitted photons within every band takes the form of a Lorentzian. In the strong coupling regime, we find a non-exponential decay of the atom, which is due to non-Markovian dynamics of the system. Moreover, the population of the atom presents oscillations in time and it converges to a non-zero positive value, indicating that the a.tom never fully decays. In this regime the spectrum of the emitted photons becomes more involved.

•Jan 1, 2018•0 citations
We examine the spontaneous emission spectrum of a Λ-type three-level atom embedded in a coupled-resonator optical waveguide. Owing to the high degree of confinement of light within the resonators, the waveguide modes can be obtained in the framework of an electromagnetic tight-binding theory. The corresponding density of modes exhibits singularities at the band edges leading to interesting features in the spontaneous emission spectrum such as dark lines and narrow emission peaks. The position and the shape of these features depend strongly on the geometry and refractive index of the waveguide.
The spontaneous emission spectrum from a V-type three-level atom embedded in a double-band photonic band gap (PBG) material has been investigated for the first time. Most interestingly it is shown that there is not only a black dark line, but also a narrow spontaneous line near the edges of the double photonic band. The positions of the dark line and narrow spontaneous line are near the transition from an empty upper level to a lower level. The lines stem from destructive and constructive quantum interferences, which induce population transfer between the two upper levels, in the PBG reservoirs. The effects of system parameters on the interference have been discussed in detail.
The spontaneous emission spectrum from a driven three-level atom placed inside a double-band photonic crystal has been investigated. We use the model which assumes the upper levels of the atomic transition are coupled via a classical driving field. The transition from one of the upper levels to lower level couples to the modes of the modified reservoir, and the transition from the other upper level to lower level interactwith the free vacuum modes. The effect of classical driving field on the spontaneous emission spectrum of this latter transition is investigated in detail. Most interestingly it is shown that only in the presence of the classical driving field; there is a black dark line in the spontaneous emission spectrum of free-space transition when the modified reservoir is of the photonic band gap type. This dark line is not seen in the case where the modified reservoir is of the free space type for relatively weak driving field.
The spontaneous decay of a VVV-type three-level atom placed in a negative-refractive-index waveguide is analyzed. We find that in thin waveguides, highly efficient surface-guided modes are supported, which do not occur in positive-index waveguides. In addition, at low absorption, the mode density and thus spontaneous emission into particular regular-guided modes is enhanced by several orders of magnitude as compared to regular dielectric waveguides. The asymmetries between emission into the different modes and the enhancement of particular guided modes allow us to induce strong spontaneous emission interference between transitions with orthogonal transition dipole moments.
The two models of three-level (one upper level and two lower levels, or two upper levels and one lower level) atom embedded in a double-band photonic crystal are adopted. The atomic transitions from the upper levels to the lower levels are assumed to be coupled by the same reservoir which are respectively the isotropic photonic band gap (PBG) modes, the anisotropic PBG modes and the free vacuum modes. The effects of the fine structure of the atomic ground state levels in the model with one upper level and two lower levels and the quantum interferences in the model with two upper levels and one lower level on the spontaneous emission spectrum of an atom are investigated in detail. Most interestingly, it is shown that new spontaneous emission lines are produced from the fine splitting of atomic ground state levels in the isotropic PBG case. The quantum interferences induce additional narrow spontaneous lines near the transition from the empty upper level to the lower level.
Quantum interferences in spontaneous emission spectrum from a V-type three-level and a double V-type four-level atom embedded in a double-band photonic band-gap material have been investigated. We demonstrate that there is not only a black dark line, but also a narrow spontaneous line in the spectrum. The dark line results from a destructive interference or singularities of the density of states of the radiation field. The narrow spectral line arises from a population transfer under joint constructive interferences. The spontaneous emission spectrum is compared to the cases of single-band and double-band photonic band-gap reservoirs.
In this work we study the spontaneous emission of a two-level atom placed inside a hollow cylindrical waveguide of infinite length and with perfectly electric conducting walls. The atom, whose electric dipole moment is assumed to be oriented along the symmetry axis of the waveguide, couples to a photonic band structure with a non-linear dispersion relation. We address two different regimes of coupling between the atom and the photonic band structure. In particular, we refer to the regime where the internal frequency of the a.tom is close to a band edge as the strong coupling regime and to the regime where the internal frequency is far from a band edge as the weak coupling regime. In the weak coupling regime, we find that the a.tom decays exponentially with a modified decayed rate due to the presence of the waveguide, and that the line-shape of the emitted photons within every band takes the form of a Lorentzian. In the strong coupling regime, we find a non-exponential decay of the atom, which is due to non-Markovian dynamics of the system. Moreover, the population of the atom presents oscillations in time and it converges to a non-zero positive value, indicating that the a.tom never fully decays. In this regime the spectrum of the emitted photons becomes more involved.