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.

Amplified Extended Modes in Random Lasers / MUJUMDAR S.; RICCI M.; R. TORRE; WIERSMA D.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 93:(2004), pp. 053903(1)-053903(4). [10.1103/PhysRevLett.93.053903]

Amplified Extended Modes in Random Lasers

RICCI, MARILENA;TORRE, RENATO;WIERSMA, DIEDERIK SYBOLT
2004

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.
2004
93
053903(1)
053903(4)
MUJUMDAR S.; RICCI M.; R. TORRE; WIERSMA D.
File in questo prodotto:
File Dimensione Formato  
RandomLaser-PRL-2004.pdf

Accesso chiuso

Tipologia: Versione finale referata (Postprint, Accepted manuscript)
Licenza: DRM non definito
Dimensione 105.69 kB
Formato Adobe PDF
105.69 kB Adobe PDF   Richiedi una copia

I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/224789
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 286
  • ???jsp.display-item.citation.isi??? 256
social impact