Abstract
A hetero-barrier rectifier, Fermi-level managed barrier (FMB) diode, was developed for broadband and low-noise THzwave detection. The FMB diode has a very low barrier height of 100 meV or less, which is essential for attaining low noise-equivalent power detection under a zero-biased condition. The fabricated module integrating a high-gain preamplifier could detect signals in a wide frequency range from 160 GHz to 1.4 THz with a very low noise equivalent power (NEP) of 3 × 10-12 W√Hz at 300 GHz in the square-law detection mode. For the heterodyne detection, an FMB diode module integrating a broadband trans-impedance amplifier was fabricated, exhibiting an intermediate frequency bandwidth of 11 GHz. Using this module, an extremely low NEP of 1.1 × 10-18 W/Hz was achieved with a very low local oscillator power of 6 × 10-6 W at around 300 GHz.
Published Version
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