Erbium-activated HfO2-based waveguides for photonics

Gonçalves, Rogéria Rocha; Carturan, G.; Montagna, M.; Ferrari, M.; Zampedri, L.; Pelli, S.; Righini, Giancarlo C.; Ribeiro, Sidney J. L.; Messaddeq, Younès

doi:10.1016/s0925-3467(03)00261-1

Cited by 117 publications

(56 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…UC emission at Ϸ650 nm under excitation at 980 nm was reported for Er 3+ doped SiO 2 -HfO 2 films. 16 However, the UC phenomenon in RE doped HfO 2 NC was not studied before.…”

Section: Introductionmentioning

confidence: 99%

Upconversion luminescence in Er3+ doped and Er3+/Yb3+ codoped zirconia and hafnia nanocrystals excited at 980 nm

Gómez

Menezes

Araújo

et al. 2010

Journal of Applied Physics

Self Cite

View full text Add to dashboard Cite

Frequency upconversion ͑UC͒ luminescence in nanocrystalline zirconia ͑ZrO 2 ͒ and hafnia ͑HfO 2 ͒ doped with Er 3+ and Yb 3+ was studied under continuous-wave excitation at 980 nm. Samples of ZrO 2 :Er 3+ , ZrO 2 :Er 3+ / Yb 3+ , and HfO 2 :Er 3+ / Yb 3+ were prepared by the sol-gel technique and characterized using x-ray diffraction and electron microscopy. A study of the infrared-to-green and infrared-to-red UC processes was performed including the analysis of the spectral and the temporal behavior. The mechanisms contributing to the UC luminescence were identified as excited state absorption and energy transfer among rare-earth ions.

show abstract

“…UC emission at Ϸ650 nm under excitation at 980 nm was reported for Er 3+ doped SiO 2 -HfO 2 films. 16 However, the UC phenomenon in RE doped HfO 2 NC was not studied before.…”

Section: Introductionmentioning

confidence: 99%

Upconversion luminescence in Er3+ doped and Er3+/Yb3+ codoped zirconia and hafnia nanocrystals excited at 980 nm

Gómez

Menezes

Araújo

et al. 2010

Journal of Applied Physics

Self Cite

View full text Add to dashboard Cite

show abstract

“…As far as the role of hafnia concentration on the spectroscopic properties is concerned, we observed that the bandwidth of the 4 I 13/2 → 4 I 15/2 emission is practically independent on the composition of the waveguide. This is due to the fact that HfO 2 promotes a disruption of the silica network, as we proved by Raman measurements [9,22,23]. As a consequence, Hf 4+ increases the number of Si-O non-bridging groups accounting for a general network flexibility, which may accommodate Er 3+ contents without appreciable matrix strains.…”

Section: Rare Earth-doped Planar Waveguidesmentioning

confidence: 77%

“…1b) energy levels with the description of the two different processes that can enhance the spectroscopic characteristics of Er 3+ at 1.5 µm. In fact, several studies have been developed on the basis of silica-hafnia and fluoride waveguiding systems [20][21][22]. The fabrication protocol of amorphous silica-hafnia waveguides by the sol-gel route in now well consolidated.…”

Section: Rare Earth-doped Planar Waveguidesmentioning

confidence: 99%

Red photonic glasses and confined structures

Gonçalves¹,

Łukowiak²,

Ristić³

et al. 2014

Bulletin of the Polish Academy of Sciences Technical Sciences

View full text Add to dashboard Cite

Abstract. We present some recent results obtained by our team in rare earth doped photonic glasses and confined structures, in order to give some highlights regarding the state of art in glass photonics. To evidence the unique properties of transparent glass ceramics we compare spectroscopic and structural properties between the parent glass and the glass ceramics. Starting from planar waveguides we move to spherical microresonators, a very interesting class of photonic confined structures. We also conclude the short review with some remarks about the perspective for glass photonics.

show abstract

“…Er-doped SnO 2 can also be used in optical amplifiers and electroluminescent devices where electron-hole energy is transferred to Er 3 þ ion. Besides, sol-gel route has shown many advantages in preparing erbium-doped waveguides amplifiers (EDWA) [6,7]. Currently, there is a growing interest in the study of new host materials obtained by the sol-gel method.…”

Section: Introductionmentioning

confidence: 99%