The enhancement of the Er3+ ions' photoluminescence (PL) emission at 1.54 mum in a Si and Er coimplanted aluminosilicate glass is investigated in detail. A postimplantation thermal treatment has been performed to recover the damage induced by the implantation process and to promote Si aggregation. It will be shown that 1 h treatment in N-2 atmosphere is not sufficient to induce Si precipitation for temperatures up to 500 degreesC. Nevertheless, the most intense Er3+ PL emission at 1.54 mum is achieved after a thermal treatment at 400 degreesC. Such emission has been investigated by pumping in and out of resonance, showing a very efficient energy transfer process in the whole excitation wavelength range (360-515 nm). These results suggest that good energy transfer mediators could be small Si aggregates and not only crystalline clusters. For the best performing sample, the effective Er excitation cross section has been measured to be higher than 10(-17) cm(2) at 379 and 390 nm and about 2x10(-16) cm(2) at 476 nm, that is, several orders of magnitude higher than the Er direct absorption cross section (of the order of 10(-21) cm(2) in this glass). Moreover the coefficient of cooperative upconversion has been evaluated to be 2.7x10(-18) cm(3) s(-1). The structural and optical properties of this material are discussed and compared to those found for Si and Er codoped silica. (C) 2004 American Institute of Physics.

Evidence of energy transfer in an aluminosilicate glass codoped with Si nanoaggregates and Er3+ ions

Enrichi, F.
;
2004-01-01

Abstract

The enhancement of the Er3+ ions' photoluminescence (PL) emission at 1.54 mum in a Si and Er coimplanted aluminosilicate glass is investigated in detail. A postimplantation thermal treatment has been performed to recover the damage induced by the implantation process and to promote Si aggregation. It will be shown that 1 h treatment in N-2 atmosphere is not sufficient to induce Si precipitation for temperatures up to 500 degreesC. Nevertheless, the most intense Er3+ PL emission at 1.54 mum is achieved after a thermal treatment at 400 degreesC. Such emission has been investigated by pumping in and out of resonance, showing a very efficient energy transfer process in the whole excitation wavelength range (360-515 nm). These results suggest that good energy transfer mediators could be small Si aggregates and not only crystalline clusters. For the best performing sample, the effective Er excitation cross section has been measured to be higher than 10(-17) cm(2) at 379 and 390 nm and about 2x10(-16) cm(2) at 476 nm, that is, several orders of magnitude higher than the Er direct absorption cross section (of the order of 10(-21) cm(2) in this glass). Moreover the coefficient of cooperative upconversion has been evaluated to be 2.7x10(-18) cm(3) s(-1). The structural and optical properties of this material are discussed and compared to those found for Si and Er codoped silica. (C) 2004 American Institute of Physics.
Energy transfer, Silicon nanoaggregates, Erbium, photoluminescence
File in questo prodotto:
File Dimensione Formato  
10_2004_Enrichi_JAP.pdf

solo utenti autorizzati

Descrizione: Articolo
Tipologia: Versione dell'editore
Licenza: Accesso ristretto
Dimensione 210.69 kB
Formato Adobe PDF
210.69 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

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

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11562/1064632
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 38
  • ???jsp.display-item.citation.isi??? 37
social impact