RF-sputtering technique for fabrication of dielectric multilayer structures with low-threshold coherent emission at 1.5 µm
| Autor: | Davor Ristić, Daniele Zonta, Roberta Ramponi, Lidia Zur, Alessandro Chiasera, Anna Lukowiak, Mile Ivanda, Yann G. Boucher, Giorgio Speranza, Francesco Scotognella, Stefano Varas, Maurizio Ferrari, Giancarlo C. Righini, Cesare Meroni, Stefano Taccheo, Lam Thi Ngoc Tran |
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| Předmět: |
Materials science
Fabrication business.industry Doping Physics::Optics 02 engineering and technology Dielectric 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Microcavities 0104 chemical sciences Characterization (materials science) Photonic crystals Photonics Sputtering Optoelectronics Dielectrics 0210 nano-technology Absorption (electromagnetic radiation) business Protocols Photonic crystal |
| Zdroj: | Scopus-Elsevier 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), Munich, Germany, 23-27/06/2019 info:cnr-pdr/source/autori:Chiasera Alessandro; Meroni Cesare; Scotognella Francesco; Boucher Yann; Lukowiak Anna; Ristic Davor; Speranza Giorgio; Varas Stefano; Zur Lidia; Ivanda Mile; Taccheo Stefano; Tran Lam T.N.; Zonta Daniele; Ramponi Roberta; Righini Giancarlo C.; Ferrari Maurizio/congresso_nome:2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO%2FEurope-EQEC)/congresso_luogo:Munich, Germany/congresso_data:23-27%2F06%2F2019/anno:2019/pagina_da:/pagina_a:/intervallo_pagine |
| Popis: | Glasses based systems activated by rare earth ions are the starting point of numerous photonic devices and the control and the enhance of the emission properties of emitters is a crucial challenge for these kinds of active systems. The tailoring of the dielectric surrounding of the source is a viable possibility and several geometry, materials and fabrications protocols have been proposed at this aim. Among the different possible approaches, one-dimensional (1D) photonic crystals, that are the simplest photonic band-gap device exploitable to manipulate the emission and absorption properties of rare earth ions, are well known to provide good results in the nanometric confinement of the light. However, on these kinds of structures, the dependence of the final product on the fabrication protocol remains a crucial task of the research in material science. Various techniques that could be employed to fabricate oxide dielectric materials and rf-sputtering is a promising route to fabricate rare earth-activated 1D photonic crystals. Here we discuss some recent results regarding the design, fabrication and characterization of Er3+ doped SiO 2 /TiO 2 1D photonic microcavity (fig. 1). Different geometrical configurations are compared in order to put in evidence the effect of the geometry of the photonic crystals on the emission features [1]. Coherent emission is assessed with threshold at about 4pW observed on the optimized sample (fig. 2) and a first step towards the integration on the tip of the fiber is presented. We show as the rf-sputtering technique is suitable for the fabrication of high-quality structures matrix for coherent emission based on active glass. We present the steps used in the fabrication protocols and the optical, spectroscopic, structural and morphologic results of the samples. |
| Databáze: | OpenAIRE |
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