microdisk

A broadband microwave photonic phase shifter based on a single III-V microdisk resonator heterogeneously integrated on and coupled to a nanophotonic silicon-on-insulator waveguide is reported. The phase shift tunability is accomplished by modifying the effective index through carrier injection. A comprehensive semi-analytical model aiming at predicting its behavior is formulated and confirmed b...

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Cavity-Enhanced IR Absorption in Planar Chalcogenide Glass Microdisk Resonators: Experiment and Analysis Citation

2009

Juejun Hu Nathan Carlie Laeticia Petit Anu Agarwal Kathleen Richardson Lionel C. Kimerling

Planar microdisk optical resonators fabricated from Ge Sb S chalcogenide glass on a silicon substrate are applied for cavity-enhanced spectroscopic measurement of chemical molecular absorption fingerprint. A 0.02 cm detection limit for these devices is demonstrated. This detection limit represents a threefold improvement as compared to a straight waveguide sensor, while the physical device leng...

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Scanning electrochemical microscopy. 24. Enzyme ultramicroelectrodes for the measurement of hydrogen peroxide at surfaces.

Journal: :Analytical chemistry 1993

B R Horrocks D Schmidtke A Heller A J Bard

Hydrogen peroxide sensing microelectrodes for scanning electrochemical microscopy (SECM) have been developed and used to measure hydrogen peroxide in the diffusion layer during electrochemical reduction of oxygen on gold and carbon electrodes. These microelectrode biosensors were also used to detect immobilized glucose oxidase through the production of hydrogen peroxide during enzymatic oxidati...

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Low-loss photonic device in Ge-Sb-S chalcogenide glass.

Journal: :Optics letters 2016

Qingyang Du Yizhong Huang Junying Li Derek Kita Jérôme Michon Hongtao Lin Lan Li Spencer Novak Kathleen Richardson Wei Zhang Juejun Hu

Low-loss waveguides constitute an important building block for integrated photonic systems. In this work, we investigated low-loss photonic device fabrication in Ge23Sb7S70 chalcogenide glass using electron beam lithography followed by plasma dry etching. High-index-contrast waveguides with a low propagation loss of 0.5 dB/cm and microdisk resonators with an int...

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