Distributed Bragg Deflectors Fabricated in Sol-Gel Based Waveguides

Davis, Richard L.; Long, W. H.; Wang, Chia-Jean; Lam, Thanh; Ho, Jia Chong; Nachman, Paul; Poylio, James H.; Mishechkin, Oleg V.; Fallahi, Mahmoud

doi:10.1109/lpt.2003.821255

Cited by 8 publications

(2 citation statements)

References 8 publications

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“…The sol−gel process is a promising method for the preparation of bulk materials and thin films used in integrated optics (IO) circuits. − The major advantages of the process are its simplicity and its ability to control the purity and homogeneity of the final material on a molecular level. The method offers the possibility of modifying the refractive index, phonon energy, and transparency of a material by choosing suitable matrixes such as SiO 2 , TiO 2 , ZrO 2 , Al 2 O 3 , GeO 2 etc., − either individually or in combination.…”

Section: Introductionmentioning

confidence: 99%

General and Convenient Method for Making Highly Luminescent Sol−Gel Derived Silica and Alumina Films by Using LaF₃ Nanoparticles Doped with Lanthanide Ions (Er³⁺, Nd³⁺, and Ho³⁺)

et al. 2005

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Silica films with Ln3+-doped LaF3 nanoparticles were prepared by sol gel method and their luminescent properties were studied as a function of the temperature. Significant improvements in the luminescent properties, in terms of the lifetime for the 4I13/2 level of Er3+ (∼10.9 ms), 4F3/2 level of Nd3+ (∼171 μs), and 5F3 level of Ho3+ (∼6 μs), were obtained when corresponding nanoparticles are incorporated in silica films rather than the bare ions. In addition to the LaF3 as the low phonon energy matrix, the absence of lanthanide ion clustering, and the increased distance between the OH groups of the silica matrix and the lanthanide ions, are responsible for the observed improvements in the luminescent properties for nanoparticle incorporated silica films. Lifetime values could be further improved by incorporating core−shell nanoparticles (the doped LaF3 core surrounded by an undoped shell of LaF3) in the silica matrix, as a result of further reduction of the nonradiative pathways.

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Section: Introductionmentioning

confidence: 99%

General and Convenient Method for Making Highly Luminescent Sol−Gel Derived Silica and Alumina Films by Using LaF₃ Nanoparticles Doped with Lanthanide Ions (Er³⁺, Nd³⁺, and Ho³⁺)

et al. 2005

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“…Another type of waveguide-to-slab beam coupler, based on diffraction instead of leakage, was proposed by Stoll in 1978 [16] and the device was named distributed Bragg deflector (DBD). The same concept was used in [17] and in [18] [19] where a DBD based in a smart combination of a sidewall grating and SWG material was successfully used to design, and experimentally demonstrate a wavelength demultiplexer in a silicon platform.…”

Section: Introduction To Distributed Bragg Deflectorsmentioning

confidence: 99%

Silicon subwavelength waveguiding devices

Molina-Fernández

Wangüemert‐Pérez

Ortega‐Moñux

et al. 2020

High Contrast Metastructures IX

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Silicon photonics has emerged as an intense field of research due to its unique capabilities to integrate photonics and electronics into the same platform using standard semiconductor fabrication facilities. Subwavelength grating (SWG) structures, i.e. periodic nanostructured waveguides with a pitch below half the wavelength of light, allow the lossless propagation of Bloch-Floquet modes which closely resemble propagation through a homogenous waveguide with optical properties (refractive index, dispersion, birefringence) that can be tailored to fulfill specific design goals. SWG engineering is now routinely used for novel and advanced device design. Fiber-chip couplers, polarization and mode multiplexers, multimode interference couplers (MMIs), lenses, and bragg filters have been successfully designed in our group based in these concepts. In this invited talk we will review some of our last advances in the field.

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Electro-optic waveguide based on hybrid sol–gel doped with organic chromophore

Zhang

Fallahi

2005

Optics Communications

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Distributed Bragg Deflectors Fabricated in Sol-Gel Based Waveguides

Cited by 8 publications

References 8 publications

General and Convenient Method for Making Highly Luminescent Sol−Gel Derived Silica and Alumina Films by Using LaF₃ Nanoparticles Doped with Lanthanide Ions (Er³⁺, Nd³⁺, and Ho³⁺)

General and Convenient Method for Making Highly Luminescent Sol−Gel Derived Silica and Alumina Films by Using LaF₃ Nanoparticles Doped with Lanthanide Ions (Er³⁺, Nd³⁺, and Ho³⁺)

Silicon subwavelength waveguiding devices

Electro-optic waveguide based on hybrid sol–gel doped with organic chromophore

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Distributed Bragg Deflectors Fabricated in Sol-Gel Based Waveguides

Cited by 8 publications

References 8 publications

General and Convenient Method for Making Highly Luminescent Sol−Gel Derived Silica and Alumina Films by Using LaF3 Nanoparticles Doped with Lanthanide Ions (Er3+, Nd3+, and Ho3+)

General and Convenient Method for Making Highly Luminescent Sol−Gel Derived Silica and Alumina Films by Using LaF3 Nanoparticles Doped with Lanthanide Ions (Er3+, Nd3+, and Ho3+)

Silicon subwavelength waveguiding devices

Electro-optic waveguide based on hybrid sol–gel doped with organic chromophore

Contact Info

Product

Resources

About

General and Convenient Method for Making Highly Luminescent Sol−Gel Derived Silica and Alumina Films by Using LaF₃ Nanoparticles Doped with Lanthanide Ions (Er³⁺, Nd³⁺, and Ho³⁺)

General and Convenient Method for Making Highly Luminescent Sol−Gel Derived Silica and Alumina Films by Using LaF₃ Nanoparticles Doped with Lanthanide Ions (Er³⁺, Nd³⁺, and Ho³⁺)