Nanoelectronic Initiative - GHz & THz Amplifier and Oscillator Circuits With ID Nanoscale Devices for Multispectral Heterodyning Detector Arrays
Final performance rept. 1 May 2006-31 Mar 2009
HARVARD UNIV CAMBRIDGE MA SCHOOL OF ENGINEERING AND APPLIED SCIENCES
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The authors sought to accurately and directly measure kinetic inductance and plasmonic waves of 1D conductor at GHz to THz frequencies. Two types of devices were fabricated using carbon nanotubes and quantum wires formed in the GaAsAlGaAs interface as the 1D conductor. In the former case, the authors constructed devices consisting a single-walled nanotube and on-chip transmission lines. A scattering analysis was performed using a network analyzer to measure the kinetic inductance. The authors observed undesired resonances due to parasitic EM propagation modes, which interfered with the through-nanotube signaling. This has led to new device development with shorter lines to push the parasitic resonances beyond the measurement frequency range. For the parallel project using GaAs 2DEG quantum wire, scattering analysis showed conductance quantization at 3K, which behaved differently at different frequencies, possibly arising from kinetic inductance. Several devices with various designs and different types of 2DEG samples were analyzed for verification. Extensive model was also developed to account the parasitic conductance.
- Electrical and Electronic Equipment