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Terahertz (THz) emission by difference frequency generation (DFG) technique has attracted vast interests recently. Quantum dot (QD) system is proposed to be the best candidate for THz emission by DFG technique due to its large optical nonlinearity. For efficient QD THz emission, the QD transition energies must lie within the THz range (0.4–41 meV). However, QD transition energies generally fall outside...
Photomixer with single walled carbon nanotubes utilizing a dual dipole antenna is fabricated. The output spectrum of the continuous-wave Terahertz photomixer with SWCNTs is presented. DC biased voltage dependent characteristic of CW photomixer with SWCNTs is demonstrated.
Low temperature GaAs grown by an MBE system exhibiting Hall carrier mobility of 5000 cm2/v.s. is fabricated into continuous-wave (CW) Terahertz (THz) photomixers utilizing a dual-dipole antenna with an interdigitated feed structure. The characteristics of the CW THz photomixer are presented.
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