Tin dioxide based photonic systems

Tran, Lam Thi Ngoc; Meneghetti, Marcello; Żur, Lidia; Chiasera, Alessandro; Armellini, Cristina; Varas, Stefano; Tran, Tuan T.; Łukowiak, Anna; Zonta, Daniele; Righini, Giancarlo C.; Ferrari, Maurizio

doi:10.1109/cleoe-eqec.2017.8086598

Cited by 1 publication

(16 citation statements)

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“…Considering the limitation of low SnO 2 content or the presence of nonstoichiometric SnO x encountered by several fabrication methods (MCVD, melt-quenching and ion-implantation), sol-gel has been a profitable alternative to produce SiO 2 -SnO 2 photonic glass-ceramics with higher SnO 2 content thanks to its low temperature and melt-free synthesis 2,5 . High content of SnO 2 nanocrystals in the sol-gel derived SiO 2 -SnO 2 glass-ceramic systems gives advantages not only to obtain effective rare earth luminescence sensitization but also high photorefractivity as indicated in our recent works 8,11,12 . However, to achieve this, the first research demand is to develop reliable fabrication protocols and controlling the ion-ion interaction 7,13 .…”

Section: Introductionmentioning

confidence: 83%

“…Then, a proper amount of de-ionized water containing HCl catalyst was poured into the mixture to proceed the hydrolysis and condensation reaction to obtain the final solution. The quantities of all the chemicals used for the SiO 2 -SnO 2 :Er 3+ syntheses were calculated based on the fundamental ratios of TEOS/H 2 O/HCl which were 1/10/0.009 for the monoliths 14,15 and 1/2/0.0037 for the planar waveguides 8,11,12 .…”

Section: Sol-gel Derived Fabrication Processes For Sio2-sno2 Glass-ceramicsmentioning

confidence: 99%

“…In planar waveguides, i.e. 2Dstructures, for the dip-coating deposition, low viscosity of the solutions for the waveguides was required 11,16 which was much lower than the ones for the monoliths and thus, the aging time was also limited in several hours. The solutions then are used for dip-coating to deposit the planar waveguides.…”

Section: Sol-gel Derived Fabrication Processes For Sio2-sno2 Glass-ceramicsmentioning

confidence: 99%

“…Therefore, the development of synthesis protocols, with appropriate thermal treatment was the first demand to obtain homogeneous and transparent SiO 2 -SnO 2 glass-ceramics. Concerning the heat-treatment, after the continuously consolidated works 14,15,11,12,8 , optimal heat-treatment processes for obtaining optically qualified SiO 2 -SnO 2 :Er 3+ glass-ceramic systems were defined. Based on the study on thermal analyses 14,15 , a multi-step heat-treatment up to 900ºC for a prolonged annealing time, e.g.…”

Section: Sol-gel Derived Fabrication Processes For Sio2-sno2 Glass-ceramicsmentioning

confidence: 99%

“…The role of SnO 2 nanocrystals as rare-earth ion luminescence sensitizers allows to overcome the low absorption cross section of the Er 3+ ion 7,8 . The photorefractivity of sol-gel derived SnO 2 glass-ceramics allows applying the robust direct laser photoinscription technique on the systems to fabricate Bragg gratings and channel waveguides for waveguide integrated laser 9,10,11 . The results presented in this communication not only demonstrate the viability and outstanding properties of the SiO 2 -SnO 2 glass-ceramics for photonic applications but also put the basis for the fabrication of solid state and integrated lasers.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Photonic glass ceramics based on SnO2 nanocrystals: advances and perspectives

Tran¹,

Armellini²,

Balda³

et al. 2020

Optical Components and Materials XVII

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SnO 2 -based glass-ceramics activated by rare earth ions have been extensively investigated because of the need to develop reliable fabrication protocols and clarify some interesting optical, structural, and spectroscopic features of the system. There is one important weakness in glass photonics when the rare earth ions are employed as luminescent sources. This is the low absorption cross section of the electronic states of the rare earth ions. A sensitizer is therefore requested. In the last years, we demonstrated that SiO 2 -SnO 2 glass ceramics, presenting a strong absorption cross section in the UV range due to the SnO 2 nanocrystal, are effective rare earth ions sensitizers. Another interesting property of the SiO 2 -SnO 2 system is its photorefractivity. The high photorefractivity of sol-gel-derived SnO 2 -SiO 2 glass-ceramic waveguides has been demonstrated in several papers published by our consortium. It has been shown that the UV irradiation induces refractive index change allowing the direct writing of both channel waveguides and Bragg gratings.The results presented in this communication not only demonstrate the viability and outstanding properties of the SiO 2 -SnO 2 glass-ceramics for photonic applications but also put the basis for the fabrication of solid state and integrated lasers. The next steps of the research are the fabrication of the channels and mirrors exploiting the photorefractivity as well as to draw glass ceramic fiber, checking the lasing action and corresponding functional characteristics. Finally, it is worth noting that the dynamic of the energy transfer from the nanocrystals to the rare earth ions is still an exciting open question.

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