Photonen‐Korrelationen in der spontanen Emission eines Zwei‐Atom‐Systems

Richter, Th.

doi:10.1002/andp.19794910404

Cited by 39 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, however, g@) a t first decreases with time and after running through a minimum increases with time, reaches a maximum and then declines to zero. Thereby the maximum toward the end of the emission process is all the more pronounced the smaller the interatomic distance is and a large enhanced photon bunching effect may occur just like in the two-atom radiation [13]. For sufficient small distances gc2) falls off soniewhat below 1 temporarily indicating an antibunching effect in this radiation which is most pronounced if the atomic system in the avarage is half deexcited.…”

Section: Intensity Correlationsmentioning

confidence: 93%

“…In the following we discuss angular correlat,ions between simultaneously emitted photons which are described by GC2)(ii, t ; fa, t ) given by (28). In the three-atom case G(2) shows a complicated space-time behaviour compared with the expression for an initially fully excited two-atom system G&,m, [13]: nn(il, t ; i,, t ( -4 y t )…”

Section: One-time A4ngnlar Correlationsmentioning

confidence: 99%

See 1 more Smart Citation

Cooperative Spontaneous Emission from an Initially Fully Excited System of Three Identical Two‐level Atoms

Richter¹

1983

Annalen der Physik

Self Cite

View full text Add to dashboard Cite

A b s t r a c t . Using Lehmberg's master equation and taking into account dipole-dipole near-field interaction the time-dependent intensity pattern, intensity -and angular correlations of the cooperative spontaneous radiation from an initially fully excited system of three identical two-level atoms arc calculated. The intensity pattern developes lobes in different directions a t different times in such a wsy that contrary to the two-atom system the spatial distribution of the total number of the emittcd photons differs from that of the single-atom radiation pattern. I n particular three atoms placed in propcr distances on a straight line emit preferentially their energy along this line. At the beginning of the emission process the probability to find two photons simultaneously in the same (or geometrical equivalent) direction is always highest but in the coursc of time, contrary to the twoatom ease, it may well happen that the probability of finding two photons in quite different directions becomes more favoured. Kooperative spontane Emission cines anflinglich vollstlindig angeregten Systems von drci gleichen Zwei-Niveau-AtomenI n h a l tsiibersicht. Es wcrdcn der richtungsabhangigc Intcnsitats-Zeit-Verlauf sowie die Intensitats-und Winkelkorrelationen der spontanen Strahlung eincs kooperativ emittierenden, anfanglich vollstandig angeregten Systems von drei gleichen Zwei-Niveau-Atomen mit Hilfe der Lehmbergschen Mastergleichung untcr Beriicksichtigung dcr Dipol-Dipol-Nahfeldwechselwirkung bereehnet. Die Richtcharakteristik der Intcnsitat zeigt zu verschiedenen Zeiten Keulen in untersehiedlichen Richtungen derart, daB im Gegensatz zum Zwei-Atomfall die Richtungsverteilurig der insgesanit emittierten Photonen von der Ein-Atomrichtcharakteristilr abweicht.Insbesondere strahlen drei, in geeignetem Abstsnd auf ciner Geraden angeorclnete Atome vorzugswcisc in Richtung der Vcrbindongslinie. Zri Beginn des Ausstrahlungsprozesses ist die Wahrseheinlichlieit, zwei Photonen gleichzcitig in dorselben (hzw. gcomctrisch Iquivalenten) Richtung zu finclen, immer am groBten. Im Verlaaf der Zoit kann cs jcdoch im Gegensatz zum Zwei-Atomsystem dazu kommen, daB die simultitnc Emission zwcicr Photonen in vijllig verschiedene Richtnngcn bevorzugt ist.

show abstract

Section: Intensity Correlationsmentioning

confidence: 93%

Section: One-time A4ngnlar Correlationsmentioning

confidence: 99%

Cooperative Spontaneous Emission from an Initially Fully Excited System of Three Identical Two‐level Atoms

Richter¹

1983

Annalen der Physik

Self Cite

View full text Add to dashboard Cite

show abstract

“…The case of doubly excited systems has been considered in great detail by Richter [25], when the intemuclear distance 8 is fixed. Let us notice that [25] uses a master equation approach and the quantum regression theorem.…”

Section: Time Evolution Of the Atomic Operators -mentioning

confidence: 99%

“…Moreover, the first effect of such a molecular rotation would be a depolarization of the fluorescence light, which was not observed in the experiment. (ii) Failure of the hypothesis leading to equation (25). -Equation (25) have been obtained assuming an isotropic distribution of recoil axis.…”

mentioning

confidence: 99%

Quantum interference effect for two atoms excited by molecular photodissociation : a theoretical analysis

Grangier

Vigué

1987

J. Phys. France

View full text Add to dashboard Cite

Reçu le 2 octobre 1986, accept6 le 5 janvier 1987 Résumé.-Nous présentons l'analyse théorique d'une expérience, dans laquelle nous avons observé une modulation temporelle dans la lumière de fluorescence d'un système de deux atomes, obtenus par photodissociation de molécules Ca2 par une impulsion laser. Le calcul est d'abord effectué sur un modèle simple, dans lequel on considère deux atomes couplés au champ électromagnétique quantifié. Nous discutons ensuite la pertinence de ce modèle, du point de vue de la physique moléculaire. Enfin, nous montrons que l'on obtient un bon accord entre les résultats théoriques et expérimentaux, à condition de prendre en compte les niveaux quasi liés de l'état fondamental de la molécule photodissociée. Abstract. 2014 We present a theoretical analysis of a previous experiment, in which a modulation in the timeresolved atomic fluorescence light following the photodissociation of Ca2 molecules by a pulsed laser was observed. First a calculation is performed on a simple model, involving two atoms coupled with the quantized radiation field. Then the validity of this model is discussed on molecular physics grounds. Finally, a quantitative analysis of the experiment is presented ; a good agreement is obtained if quasi-bound levels of the molecular ground state are taken into account.

show abstract

“…In Section 2 we consider collective radiation from two emitters near the nanoparticle. The radiation from two emitters is very important problem of superradiance, attracted much attention in the past for emitters without the nanoparticle [11,12]. This problem is relatively simple, but reveals many important details of physics and theory of superradiance: the role of delay in the interaction, show convenient dynamic equations describing radiation from collective states of emitters for various distances between them, etc.…”

Section: Introductionmentioning

confidence: 99%

Collective spontaneous emission of two atoms near metal nanoparticle

Protsenko,

Uskov

2014

Preprint

View full text Add to dashboard Cite

We present quantum-mechanical approach for collective spontaneous emission (superradiance) of emitters (as atoms) near metal nanoparticle, when frequencies of transitions of emitters coincide with frequency of localized plasmon resonance of the nanoparticle. Our approach is based on Schrodinger description and it uses wave functions of states of systems. Interactions between emitters and between the nanoparticle and emitters are taken into account. We consider an example of two emitters and show that radiation is occurred through symmetric states of emitters as it is in Dicke model of superradiance. The nanoparticle accelerates collective spontaneous emission similar how it accelerates spontaneous emission of single emitter. Radiation from two emitters near the nanoparticle is faster than the radiation from two separated and non-interacted "nanoparticle+single emitter" systems. Efficiency of superradiance, i.e. the ratio of emitted photons to total number initial excitations in the system, is smaller than 1 due to non-radiative losses in the nanoparticle. However the efficiency is the same for single and for two emitters near the nanoparticle. The approach can be straightforwardly generalized to the case of many emitters near the nanoparticle.

show abstract

Photonen‐Korrelationen in der spontanen Emission eines Zwei‐Atom‐Systems

Cited by 39 publications

References 12 publications

Cooperative Spontaneous Emission from an Initially Fully Excited System of Three Identical Two‐level Atoms

Cooperative Spontaneous Emission from an Initially Fully Excited System of Three Identical Two‐level Atoms

Quantum interference effect for two atoms excited by molecular photodissociation : a theoretical analysis

Collective spontaneous emission of two atoms near metal nanoparticle

Contact Info

Product

Resources

About