Danmarks Tekniske Universitet

Government of the United States of America, As Represented by the Secretary of Commerce

Kobenhavns Universitet

Silvan Schmid

Anja Boisen

Jacob M Taylor

Luis Guillermo Villanueva

Anders Sondberg Sorensen

Juergen Appel

Anders Simonsen

Albert Schliesser

Emil Zeuthen

Eugene Simon Polzik

Koji Usami

Tolga Bagci

Muhammad Faheem Khan

Tom Larsen

An optical detector for detecting radio frequency (RF) signals, the optical detector comprising a light source and a photodetector, and an electrical circuit comprising a position dependent capacitor and a bias voltage source adapted for providing a bias voltage for biasing the position dependent capacitor, the position dependent capacitor comprising an electrode and a membrane being displaceable in reaction to RF signals incident on the membrane, the membrane being metallized, has a thickness of less than 1 &#x3bc;m and a quality factor, Q, of at least 20,000, and the distance between the membrane and the electrode being less than 10 &#x3bc;m.

Optical detector and amplifier for RF-detection having a position dependent capacitor with a displaceable membrane

The present invention relates to methods and devices for determining the weight of small particles, typically being nano-sized particles by use of resonating fibers in the form of elongate members being driven into resonance by an actuator or e.g. thermal noise/fluctuation. The frequency shift in resonance frequency due to depositing of nano-sized particles is correlated with the mass deposited on the elongate member and the vibration frequency of the elongate member is determined by a detector. The read-out from the detector is transformed into a mass deposited on the elongate member. Particles are deposited by letting a fluid with the particles flow past the elongate member.

Resonant fiber based aerosol particle sensor and method

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Copenhagen, Denmark

Silvan Schmid