infrared millimeter terahertz waves scientific conferences

We exploit a ~350nm-thick GaAs/Al0.2Ga0.8As multi-quantum-well heterostructure to demonstrate heterodyne detection at 10.3um wavelength with a nearly flat frequency response up to 70GHz at room temperature, solely limited by the measurement system bandwidth. To minimize its capacitance, the device architecture relies on a 2D-array of electrically connected, sub-wavelength antenna resonators, yielding a total detector active area < 90um2 (C < ~30fF), while keeping a radiation collection area of ~360um2. Broadband RF access to the array is provided by an integrated, coplanar waveguide connected through air-bridges. We obtain responsivities of ~0.15A/W and ~1.5A/W at 300K and 77K respectively.