We present results of experiments on the spontaneous emission rate of a europium complex in dense supercritical ${\mathrm{CO}}_{2}$ . The refractive index of the supercritical gas is varied from 1.00 to 1.27 by increasing the pressure up to a 1000 bars. Accordingly, the spontaneous emission rate changes. Local-field effects on spontaneous emission are clearly observed in these experiments. The empty-cavity model for the spontaneous emission rate inside dielectrics is confirmed.We present results of experiments on the spontaneous emission rate of a europium complex in dense supercritical ${\mathrm{CO}}_{2}$. The refractive index of the supercritical gas is varied from 1.00 to 1.27 by increasing the pressure up to a 1000 bars. Accordingly, the spontaneous emission rate changes. Local-field effects on spontaneous emission are clearly observed in these experiments. The empty-cavity model for the spontaneous emission rate inside dielectrics is confirmed.

Physical Review LettersJun 8, 199885 citations

Spontaneous emission

Luca Salasnich

Springer eBooksJan 1, 20200 citations

Spontaneous Emission

WORLD SCIENTIFIC eBooksFeb 1, 20120 citations

Rydberg atoms and radiation. Report for January-December 1986

Daniel Kleppner, Barbara J. Hughey, T. Gentile +2 more

The authors achieved their initial goal in the study of basic radioactive processes using Rydberg atoms - the observation of inhibited spontaneous emission. An experiment was carried out demonstrating that spontaneous emission can be effectively turned off. The underlying principle is that spontaneous emission results from the radioactive coupling between matter and a continuum of vacuum states. However, the assumptions underlying the conventional calculation of the density of modes in free space are not always valid. In particular, cavities can dramatically effect spontaneous emission. Such effects are difficult to observe in the optical regime because of the problem of making good fundamental mode cavities at short wavelengths. Excellent cavities can be made at microwave wavelengths, but spontaneous emission is enhanced by a factor of n4 where n is the principal quantum number, allowing such effects to be studied.The authors achieved their initial goal in the study of basic radioactive processes using Rydberg atoms - the observation of inhibited spontaneous emission. An experiment was carried out demonstrating that spontaneous emission can be effectively turned off. The underlying principle is that spontaneous emission results from the radioactive coupling between matter and a continuum of vacuum states. However, the assumptions underlying the conventional calculation of the density of modes in free space are not always valid. In particular, cavities can dramatically effect spontaneous emission. Such effects are difficult to observe in the optical regime because of the problem of making good fundamental mode cavities at short wavelengths. Excellent cavities can be made at microwave wavelengths, but spontaneous emission is enhanced by a factor of n4 where n is the principal quantum number, allowing such effects to be studied.

Jan 1, 19870 citations

Influence of spontaneous emission on atomic solitons

K. J. Schernthanner, Georg Lenz, Pierre Meystre

We numerically solve an effective single-atom Hartree-Fock master equation in order to investigate the effects of spontaneous emission on atomic Thirring solitons and atomic gap solitons. We show that spontaneous emission detrimentally effects the existence of Thirring solitons, as expected from the fact that they only occur on resonance. In contrast, gap solitons, which can also exist off resonance, survive in the presence of spontaneous emission in weakly allowed transitions, albeit at high atomic densities. This result is illustrated in the case of the [2 $^{1}$ ${\mathit{S}}_{0}$ \ensuremath{\leftrightarrows}2 $^{3}$ ${\mathit{P}}_{1}$ ]- intercombination line of magnesium.We numerically solve an effective single-atom Hartree-Fock master equation in order to investigate the effects of spontaneous emission on atomic Thirring solitons and atomic gap solitons. We show that spontaneous emission detrimentally effects the existence of Thirring solitons, as expected from the fact that they only occur on resonance. In contrast, gap solitons, which can also exist off resonance, survive in the presence of spontaneous emission in weakly allowed transitions, albeit at high atomic densities. This result is illustrated in the case of the [2 $^{1}$${\mathit{S}}_{0}$\ensuremath{\leftrightarrows}2 $^{3}$${\mathit{P}}_{1}$]- intercombination line of magnesium.

Physical Review ANov 1, 199410 citations

Spontaneous emission

Eric B. Szarmes

Morgan & Claypool Publishers eBooksDec 1, 20140 citations

We present results of experiments on the spontaneous emission rate of a europium complex in dense supercritical

{\mathrm{CO}}_{2}

. The refractive index of the supercritical gas is varied from 1.00 to 1.27 by increasing the pressure up to a 1000 bars. Accordingly, the spontaneous emission rate changes. Local-field effects on spontaneous emission are clearly observed in these experiments. The empty-cavity model for the spontaneous emission rate inside dielectrics is confirmed.

^{1}

{\mathit{S}}_{0}

\ensuremath{\leftrightarrows}2

^{3}

{\mathit{P}}_{1}

]- intercombination line of magnesium.