Amplified extended modes in random lasers

Anno: 2004

Autori: Mujumdar S., Ricci M., Torre R., Wiersma D.

Affiliazione autori: European Laboratory for Non-linear Spectroscopy and INFM, Via Nello Carrara 1, 50019 Sesto Fiorentino (Florence), Italy

Abstract: We report on a new random laser phenomenon that gives rise to narrow emission modes without requiring optical cavities. Sharp emission peaks are observed experimentally over a broad range of scattering strengths and analyzed in numerical calculations. We find that the introduction of exponential gain in a multiple light scattering process strongly increases the importance of very long light paths. Such long paths are rare and often neglected in passive disordered materials but we show that they can dominate the emission spectrum from an amplifying disordered system.

Giornale/Rivista: PHYSICAL REVIEW LETTERS

Volume: 93 (5)      Da Pagina: 053903-1  A: 053903-4

Parole chiavi: Emission spectra; Light waves; Multiple scattering; Random lasers, Arrays; Diffusion; Frequency doublers; Light emission; Light interference; Light scattering; Monochromators; Numerical methods; Random processes; Solid state lasers
DOI: 10.1103/PhysRevLett.93.053903

Citazioni: 265
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18
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