Abstract

We study the crossover between the diffusive and quasi-ballistic regimes of random lasers. In particular, we compare incoherent models based on the diffusion equation and the radiative transfer equation (RTE), which neglect all wave effects, with a coherent wave model for the random laser threshold. We show that both the incoherent and the coherent models predict qualitatively similar thresholds, with a smooth transition from a diffuse to a quasi-ballistic regime. The shape of the intensity distribution in the sample as predicted by the RTE model at threshold is also in good agreement with the coherent model. The approximate incoherent models thus provide useful analytical predictions for the threshold of random lasers as well as the shape of the random laser modes at threshold.

© 2016 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Diffusive-to-ballistic transition in dynamic light transmission through thin scattering slabs: a radiative transfer approach

Rachid Elaloufi, Rémi Carminati, and Jean-Jacques Greffet
J. Opt. Soc. Am. A 21(8) 1430-1437 (2004)

Photon diffusion coefficient in scattering and absorbing media

Romain Pierrat, Jean-Jacques Greffet, and Rémi Carminati
J. Opt. Soc. Am. A 23(5) 1106-1110 (2006)

Diffuse optical tomography using the one-way radiative transfer equation

Pedro González-Rodríguez and Arnold D. Kim
Biomed. Opt. Express 6(6) 2006-2021 (2015)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (52)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription