| 摘要 |
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 μm and a quality factor, Qm, of at least 20,000, and the distance between the membrane and the electrode being less than 10 μm. |
| 主权项 |
1. An optical detector and amplifier for detecting radio frequency (RF) and microwave signals, the optical detector comprising:
a light source and a photodetector, 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, wherein the position dependent capacitor comprises an electrode and a membrane, the membrane being adapted for being displaced in reaction to RF signals incident on the membrane, the light source is adapted for, in operation, emitting light onto the membrane and the photodetector is adapted for, in operation, receiving light emitted by the light source and reflected by the membrane, the membrane is metallized, comprises a thickness of less than 1 μm, and comprises a quality factor, Qm, of at least 20,000, and the distance, d, between the membrane and the electrode is less than 10 μm. |
