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Photonic crystal (PhC) nanobeam cavities have attracted increasing attention owing to the advantages of high Q-factor, small mode volume and no limitation of FSR. Various PhC cavities have been developed for optical communications, optical sensors, optomechanics, etc.. We investigate the design, fabrication, and experimental characterization of high quality factor PhCnanobeam cavities on silicon....
We propose a novel method for identification of various gases using combined measurements of wavelength shift ($\Delta \lambda _{0}$ ) and reflectivity difference ($\Delta R$ ). The method relies on plotting the measurement data on the $\Delta R$ –$\Delta \lambda _{0}$ space and exploits in the identification process the effect of significant loss behavior of bulk silicon near or within the visible...
Nowadays, there is a need to integrate in a single silicon chip all the components to have an integrated optoelectronic circuit. In this paper, a design and computational simulation that demonstrate that feasibility of coupling a rib type optical waveguide with a photodiode on silicon substrate is carried out. The final goal is to have an integrated silicon circuit with a light source, an optical...
A novel process flow to manufacture miniaturized optical windows on wafer-level is presented. Those windows can be used for miniaturized optical products like high-brightness LEDs (HB-LED) and digital projection (DLP) as well as more complex optical data-communication, since integrated optical functions can be implemented with low tolerances.
A diaphragm-type optical fiber pressure sensor, which has a sleeve for fiber insertion, is proposed, and its fundamental characteristics are demonstrated. The sleeve structure is fabricated by deep reactive ion etching (DRIE). The diaphragm with the sleeve is suitable for highly reliable and easy bonding between the sleeve and an optical fiber. The light intensity change by a Fabry-Perot interferometer...
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