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DEVLOPMENT OF NOVEL FUNCTIONAL MAYANK, KUMAR SINGH Tantalum pentoxide Erbium Photoluminescence Green light emission application/pdf Thesis or Dissertation Rare-earth doped thin films are drawing increasing attention for their use in amplifiers\nand lasers and their suitability for integrated optics. The optical properties of rareearth\nions in solids have been investigated widely and are well understood. Er3+-doped\nmaterials are attracting much attention because of the search for solid-state-laser\ndevices operating in the green region, optical devices for 3D displays and for\nwaveguides, which can work in telecommunication window.\nIn this dissertation we researched and fabricated different novel functional thin films\nfor photonics devices fabricated by RF-magnetron sputtering method as –\n Erbium-doped SiO2\n Tantalum pentoxide [Ta2O5]\n Erbium-doped Tantalum pentoxide [Er-TaOx]\n Erbium- Ytterbium co-doped Tantalum pentoxide\nWe fabricated different thin films using the RF-sputtering method and then annealed\nthem at various temperatures and time durations. PL peaks were observed at\nwavelengths of 550 and 670 nm from the Er-TaOx films. We observed the strongest\nintensities of the 550 and 670 nm peaks from the samples with 0.96 and 0.63 mol% Er\nconcentrations after annealing at 900° C for 20 min, respectively. To the best of our\nknowledge, this is the first report of light emission from Er-TaOx films fabricated by\nthe RF-sputtering method. These results demonstrate that Er-TaOx films fabricated by\nRF sputtering can serve as high quality luminescent layers.\nThese can easily be combined with other passive devices to realize novel active\ndevices (e.g., a green-light-emitting photonic crystal), as only sputtering and\nannealing processes are needed for fabrication.\nRecent reports of optical waveguides fabricated on Ta2O5, higher nonlinear\nsusceptibility χ3 of Ta2O5, and light emission from thin films makes Ta2O5 a\npromising material for novel photonic devices. 学位記番号：工博甲393 群馬大学工学研究科 2010-03 eng thesis AM http://hdl.handle.net/10087/5143 https://gunma-u.repo.nii.ac.jp/records/3787 XIX, 82p. 12301甲第393号 博士（工学） 2010-03-24 群馬大学 https://gunma-u.repo.nii.ac.jp/record/3787/files/Ph.D_E1-393.singh MK.pdf application/pdf 8.9 MB 2020-11-25