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In the Institute for Microstructural Sciences we have been developing a surface micromachining process for the fabrication RF MEMS on quartz substrates. In a previous paper we reported on the microwave performance of these switches [1]. In this paper we report on the characterization of the switch mechanical properties as a function of temperature. Real world electronic devices must meet a minimum...
A simple cavity resonator is described for measuring surface resistance (Rs) of high temperature superconductor (HTS) thin films. The cavity is a one-half wavelength of WR-28 waveguide with the HTS forming a short across one end. A choke ring reduces the need for low resistance contact. Quantitative Rs measurements can be made over the range of 10 mΩ to 500 mΩ at liquid nitrogen temperature and at...
High-speed wavelength modulation is demonstrated in a standard middle-infrared quantum cascade laser by near-infrared optical excitation. The typical wavelength modulation spectrum is obtained, which is observed at frequency up to 1.6 GHz.
A measurement of the photoresponse of a quantum-well infrared photodetector is presented. The detector response was measured from 80 K to 300 K. At 300 K, the high-frequency photocurrent response was measured up to 110 GHz and demonstrated a 1/omega decay
While this work is completely concerned with a semiconductor switch, the origin of the requirement was based on hybrid superconductive/semiconductive electronics. High temperature superconductivity (HTS) allows planar microwave circuits to be built with performance levels not possible with conventional thin film materials. By combining HTS elements with semiconductor elements it is now possible to...
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