optical devices based on symmetrical metal cladding waveguides

... reaction conditions for C 3 H 6 oxidation 43 Table 2.6 Composition of mixture gases at different reaction conditions for CO oxidation 44 Table 2.7 Composition of mixture gases at different reaction ... in different reaction conditions (condition a: excess oxygen condition with the presence of CO: 0.9 %C 3 H 6 , 0.3%CO, 5%O 2 , N 2 balance, condition b: excess oxygen condition with the presence ... Metallic oxides based on CeO 2 23 1.3.3.2 Catalytic systems based on MnO 2 24 1.3.3.3 Catalytic systems based on cobalt oxides 25 1.4.1 Mechanism of hydrocarbon oxidation over transition metal oxides

Ngày tải lên: 12/05/2014, 17:14

... shifters using nonlinear directional couplers, the control signal is at an arm of the nonlinear directional coupler, and the information signal is at the other arm The nonlinear directional couplers ... phase shifters using nonlinear directional couplers Trang 51 As mentioned above, the structure of an all optical switching requires two nonlinear directional couplers based on the Kerr effect [12] ... output power on the variation of width and length of MMI regions in all operation states of the proposed switch: a) the variation of the width and b) the variation of the length IV CONCLUSIONS A novel

Ngày tải lên: 12/12/2017, 10:45

... numerical simulations, the designs of the sensor based on silicon waveguides are optimized and demonstrated in detail We applied our structure to detect glucose and ethanol concentrations simultaneously ... silicon waveguides can be used for reducing the thermal drift 3 Optical biosensor based on two microring resonators A schematic of the structure is shown in Fig 8 The proposed structure contains one ... order than that of the recent conventional sensor based on single microring resonator By measuring the resonance wavelength shift (), the glucose concentration is detected The sensitivity

Ngày tải lên: 25/01/2021, 05:49

... some highly sensitive resonator sensors based on polymer and silicon microring and disk resonators have been developed [11-14] However, multichannel sensors based on silicon waveguides and MMI structures, ... solutions with concentrations of 0 %, 0.2 % and 0.4 % and Ethanol concentrations of 0 %, 3 % and 6 % are induced to the device The resonance wavelength shifts corresponding to the concentrations ... higher order than that of the recent conventional sensor based on single microring resonator [31, 33] For each 3 % increment of the ethanol concentration, the resonance wavelength shifts of about

Ngày tải lên: 29/01/2021, 10:44

... some highly sensitive resonator sensors based on polymer and silicon microring and disk resonators have been developed [11-14] However, multichannel sensors based on silicon waveguides and MMI structures, ... solutions with concentrations of 0 %, 0.2 % and 0.4 % and Ethanol concentrations of 0 %, 3 % and 6 % are induced to the device The resonance wavelength shifts corresponding to the concentrations ... higher order than that of the recent conventional sensor based on single microring resonator [31, 33] For each 3 % increment of the ethanol concentration, the resonance wavelength shifts of about

Ngày tải lên: 17/03/2021, 17:32

... numerical simulations, the designs of the sensor based on silicon waveguides are optimized and demonstrated in detail We applied our structure to detect glucose and ethanol concentrations simultaneously ... glucose concentration, the resonance wavelength shifts of about 800nm is achieved This is a double higher order than that of the recent conventional sensor based on single microring resonator [27, ... Based on Intensity Detection," IEEE Journal of Quantum Electronics, vol 44, pp 100-107, 2008 [7] V M Passaro, F Dell’Olio, and F Leonardis, "Ammonia Optical Sensing by Microring Resonators,"

Ngày tải lên: 18/03/2021, 10:37

... provide valuable reconfigurable interconnecting functions needed by optical cross-connect (OXC) and by fiber-optic subscribe line cross-connections in optical communications systems The MEMS ... [8] Additionally, the high nonlinearity enables compact components with the potential for monolithic integration, owing to its large nonlinear coefficient n2 and low two-photon absorption (good ... A 1x3 all optical switching based on a 1x3 MMI and a 3x3 couplers using directional couplers as phase shifters 2.2 Operation principle of the 1x3 all optical switch The configuration of the

Ngày tải lên: 19/03/2021, 17:39

... a strong focus on interrogation approaches based on intensity variation in transmission and reflection The potential applications involving structural health monitoring, medicine, environment ... rather to focus on more simple and low-cost interrogation approaches based on intensity variation measurement techniques in transmission and reflection Some brief considerations about other sensing ... addition, FBGs and interferometry will also be briefly described due to its increasing application Trang 63.1 Sensors Based on Intensity Variation Detection Sensors based on intensity variation

Ngày tải lên: 21/03/2023, 14:46

... switches provide valnabie scconfigurahle interconnecting functions needed by optical crass- connec, (OXC) and by fiber-oplic subscribe line connechons m oplical communications systems The MEMS switches ... all-optical switches based on multimode interference couplers using nonlinear directional couplers Where = 8+ (i-i)(6- ji) if iej even Coupler Figure 1 A 1x3 all optical switching based on ... fabrication of pholowrillen gralings and waveguides [9] ‘The main aim of this paper is to propose a new structure for all-optical switching based on two 3x} MMI couplers using nonlinear dircctional

Ngày tải lên: 01/06/2025, 04:58

... reaction conditions for CyHe oxidation Table 2.6 Composition of mixture gases al different reaction conditions for CO oxtdthion 0 Af Table 2.7 Composition of mixture gases at different reaction ... pollution from exhaust gases of internal combustion engine 1.3.1 Gatalytic systems based on noble metals (NMs} 20 1.3.3.1 Metallic oxides based on CeO; 23 1.3.3.3 Catalytic systems based on cobalt ... single metallic oxide in Figure 3.2 Catalytic activity of Mntv 1-3 and CeCo 1-t catalysts in excess oxygen contlition 49 Figure 3.3 CsHs conversion of CeCol-4 in different reaction conililions (condition

Ngày tải lên: 05/06/2025, 14:06

... Conj.: Additive Conjunction Adver Conj: Adversative Conjunction Cau Conj.: Causal Conjunction Temp Conj.: Temporal Conjunction Trang 7LIST OF TABLES AND FIGURES Table 2.1: Type of Cohesion ... composed by selection vocabulary and lexical cohesion is part of cohesion that concerns with connection word used Based on Halliday and Hasan explanation, they divide the lexical cohesion into two categories, ... affairs: information is conveyed, intentions made clear, its linguistic product is Text.” (1984: 100) 2.2.2 Concepts of Cohesion Cohesion based on Halliday and Hasan (1976) “cohesion theory as the

Ngày tải lên: 17/09/2019, 23:21

... sliding mode controller (has the fast response and good quality control) The paper is composed of five sections After this introduction, in the second section, the equation of the gimbal motion is presented ... section presents the steps to design the proposed controller The simulation results present in the fourth section and the last section contains the concluding remarks 2 EQUATIONS OF GIMBAL MOTION ... mode controller and a conventional PID controller The simulation result illustrated the effectiveness of the proposed controller. Keywords Electro-Optical Tracking System; Sliding- Mode Control;

Ngày tải lên: 10/02/2020, 03:39

... super-hydrophilicity and reduction of adhesion and light reflection, and absorption of harmful ultraviolet (UV) radiation, based on the existence of three-dimensional waxes For example, lotus (Nelumbo ... Prediction the low reflectivity by Finite-difference time-domain (FDTD) 12 2.3 Solar steam-generation system 13 CHAPTER 3 RESULTS AND DISCUSSION 15 3.1 Fabrication of absorbers based on some ... “Study of optical absorption of metamaterial based on nanostructure in nature” Although there are a thousand of reports and public related to metamaterial, research on natural structure-based metamaterials

Ngày tải lên: 22/09/2020, 00:40

... super-hydrophilicity and reduction of adhesionand light reflection, and absorption of harmful ultraviolet (UV) radiation, based on the existence of three-dimensional waxes For example, lotus (Nelumbo ... 2.1 Sample manufacturing conditions The conditions during sputtering operation2.1.2 Analysing surface structures (EDS, SEM, FT-IT, Spectrometer) The optical consideration was performed by a similar ... “Study of opticalabsorption of metamaterial based on nanostructure in nature” Although there are athousand of reports and public related to metamaterial, research on natural structure-based metamaterials

Ngày tải lên: 27/10/2020, 19:57

... super-hydrophilicity and reduction of adhesion and light reflection, and absorption of harmful ultraviolet (UV) radiation, based on the existence of three-dimensional waxes For example, lotus (Nelumbo ... Prediction the low reflectivity by Finite-difference time-domain (FDTD) 12 2.3 Solar steam-generation system 13 CHAPTER 3 RESULTS AND DISCUSSION 15 3.1 Fabrication of absorbers based on some ... “Study of optical absorption of metamaterial based on nanostructure in nature” Although there are a thousand of reports and public related to metamaterial, research on natural structure-based metamaterials

Ngày tải lên: 06/12/2020, 19:05

... super-hydrophilicity and reduction of adhesion and light reflection, and absorption of harmful ultraviolet (UV) radiation, based on the existence of three-dimensional waxes For example, lotus (Nelumbo ... Prediction the low reflectivity by Finite-difference time-domain (FDTD) 12 2.3 Solar steam-generation system 13 CHAPTER 3 RESULTS AND DISCUSSION 15 3.1 Fabrication of absorbers based on some ... “Study of optical absorption of metamaterial based on nanostructure in nature” Although there are a thousand of reports and public related to metamaterial, research on natural structure-based metamaterials

Ngày tải lên: 08/02/2021, 23:05

... super-hydrophilicity and reduction of adhesion and light reflection, and absorption of harmful ultraviolet (UV) radiation, based on the existence of three-dimensional waxes For example, lotus (Nelumbo ... Prediction the low reflectivity by Finite-difference time-domain (FDTD) 12 2.3 Solar steam-generation system 13 CHAPTER 3 RESULTS AND DISCUSSION 15 3.1 Fabrication of absorbers based on some ... “Study of optical absorption of metamaterial based on nanostructure in nature” Although there are a thousand of reports and public related to metamaterial, research on natural structure-based metamaterials

Ngày tải lên: 17/03/2021, 08:59

... in THF 4 Conclusion In conclusion, the donor-acceptor conjugated polymer based on thiacaliax[3]triazine and 3-hexylthiophene has been synthesized using a direct arylation polymerization in the ... the anion association mechanism, and with more-acidic protic anions following the protonation mechanism (Van et al., 2013) In this study, we synthesized the new conjugated polymer based on thiacaliax[3]triazine ... the novel conjugated polymers based on thiacaliax[3]triazine and 3-hexylthiophene via C-H direct arylation polymerization The chemical structure of obtained conjugated polymers has a donor – acceptor

Ngày tải lên: 28/06/2021, 10:09

... Synthesis, characterization, biological studies, and molecular modeling of mixed ligand bivalent metal complexes of Schiff bases based on N -aminopyrimidine-2-one/2-thione Hatice Gamze SO ˘ GUK ... 2 Results and discussion 5-chloro-2-hydroxyacethophenone with one mole N-aminopyrimidine-2-on in like manner to the preparation of analysis results for the mixed ligand metal complexes match ... octahedral 2.4 Proton and carbon nuclear magnetic resonance spectra singlet at δ 9.97 ppm is the proton of the pyrimidine ring In the spectrum of the Schiff base aromatic protons the region 110–147 ppm,

Ngày tải lên: 12/01/2022, 23:35

... Supported Pd NPs Conclusions Conventional Sonogashira Copper-free Sonogashira ↓ Recyclability is still not remarkable ↓ Only “easy” for aryl iodide ↓ Limit on broad application ... overview of Sonogashira reaction Catalyst for Sonogashira reaction Pd metal catalyst Development of Pd metal Catalyst Perspective and challenge of Pd catalyst OUTLINE 1 2 3 4 5 Trang 3Organometallic ... from one metal to other Shortcoming: - CuI-polyphosphane adducts can be formed - Ligands can be transferred from one metal to other Supposed mechanism for the copper-free Sonogashira reaction Rafeal

Ngày tải lên: 26/04/2022, 14:35