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A novel optical method for enhancing nanopore-based single molecule detection is demonstrated. Microbeads containing DNA targets are optically trapped under a nanopore to locally increase the concentration. Thermally released DNAs are then detected electrically when moving through the pore at up to 91x higher rates.
We demonstrate gas sensing using silica high-mesa waveguide for the first time. A 4.5cm length waveguide show CO2 sensing at a wavelength of λ=1572nm with rapid sensing speed of below 15µs successfully.
A complete instrumentation system for interrogating silicon photonic wire waveguide sensor array chips has been built and demonstrated. The system is designed to read 16 or more photonic wire sensors on a single silicon chip simultaneously and in real time, while delivering sample fluid to the sensors through microfluidic channels fabricated monolithically on the chip. The chip can be inserted into...
A novel concept for a continuously variable W-band phase shifter is proposed. It is based on a ridge waveguide resonator tuned by MEMS-actuated conductive fingers that interact with the fields beneath the ridge. The rotation of anti-parallel oriented MEMS conductive fingers of about half wavelength size realize a distributed interaction with the purposely structured waveguide ridge. In such a way,...
A comparison between the operational map of a QD MLL done by autocorrelation and FROG is made. The results show that the complete mode-locking region is significantly smaller when FROG is used versus autocorrelation.
We review our work on silicon wire devices designed for evanescent field sensor arrays and ultra-compact dense optical comb filters, both taking advantage of a spiral cavity resonator design. Two sensor array configurations are described, and monitoring of biomolecular binding is demonstrated with a detection limit of 0.3 pg/mm2. On-chip temperature drift compensation is achieved by using a reference...
Silicon photonic wire waveguides have a remarkably high response to surface molecular binding. Evanescent field waveguide sensors based on silicon can be interrogated using Mach-Zehnder interferometers, ring resonators, or by probing surface gratings in a reflection geometry. This paper compares these approaches from a theoretical viewpoint and through recent experimental results, with the goal of...
We demonstrate a novel method of wavelength-conversion in a PPLN-waveguide using polarization-modulation of its pump. Polarization-insensitive, all-optical, intensity-to-polarization conversion in an SOA is used to reduce the PPLN waveguide's polarization-sensitivity from >30 dB to <1 dB
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