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Nanoscopic voltage distribution of operating cascade laser devices in cryogenic temperature
1Department of Electrical & Computer Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario, Canada.
Abstract:
A nanoscopic exploratory measurement technique to measure voltage distribution across an operating semiconductor device in cryogenic temperature has been developed and established. The cross-section surface of the terahertz (THz) quantum cascade laser (QCL) has been measured that resolves the voltage distribution at nanometer scales. The electric field dissemination across the active region of the device has been attained under the device's lasing conditions at cryogenic temperature of 77 K.
