Resonance-driven random lasing

Anno: 2008

Autori: Gottardo S., Sapienza R., Garcia PD., Blanco A., Wiersma D., Lopez C.

Affiliazione autori: European Laboratory for Nonlinear Spectroscopy, INFM-BEC, via Nello Carrara 1, I-50019 Sesto Fiorentino (Florence), Italy; Instituto de Ciencia de Materiales de Madrid (CSIC), CSIC-UVigo, C/Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain

Abstract: A random laser is a system formed by a random assembly of elastic scatterers dispersed into an optical gain medium(1). The multiple light scattering replaces the standard optical cavity of traditional lasers and the interplay between gain and scattering determines the lasing properties. All random lasers studied to date have consisted of irregularly shaped or polydisperse scatterers, with a certain average scattering strength that was constant over the frequency window of the laser(2-4). In this letter we consider the case where the scattering is resonant. We demonstrate that randomly assembled monodisperse spheres can sustain scattering resonances over the gain frequency window, and that the lasing wavelength can therefore be controlled by means of the diameter and refractive index of the spheres. The system is therefore a random laser with an a priori designed lasing peak within the gain curve.

Giornale/Rivista: NATURE PHOTONICS

Volume: 2 (7)      Da Pagina: 429  A: 432

Parole chiavi: Random lasers; Frequency windows; Gain frequencies; Lasing properties; Lasing wavelength; Monodisperse spheres; Multiple light scattering; Scattering resonance; Scattering strength, Laser beams; Refractive index, Scattering
DOI: 10.1038/nphoton.2008.102

Citazioni: 268
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18
Riferimenti tratti da Isi Web of Knowledge: (solo abbonati)
Link per visualizzare la scheda su IsiWeb: Clicca qui
Link per visualizzare la citazioni su IsiWeb: Clicca qui