Intrinsic Josephson junction arrays on Bi2Sr2CaCu2O8+x single crystals andtheir possible applications at 100 GHz

C-axis junction-arrays, with a-b plane sizes of sub-microns ton 10 microns were patterned on Bi2Sr2CaCu2O8 divided byx single crystals with either a m esa or an overlap structure. We measured the current-voltage (I-V) characte ristics with microwave irradiation at a few 100 gigahertz. At a few gigaher tz, often observed were chaotic properties. Under irradiation at 100 GHz, w e successfully performed harmonic mixings between the 100 Ghz signal and up to the 100th harmonic of a local oscillator at about 1 GHz. Given in this paper are discussions on the observation of individual Shapiro steps, and d escriptions of the relevant results. Our experimental results show that int rinsic Josephson junctions in layered superconductors can be good candidate s for high frequency applications.