Abstract- Asymmetrical conductance model to analyze resonant tunneling diode terahertz oscillators

S. Diebold,   M. Fujita,   T. Nagatsuma

http://ieeexplore.ieee.org/document/8058997/

A simple expression for the conductance-voltage characteristics of resonant tunneling diodes (RTD) is presented, which takes the asymmetry of the measured characteristics into account. It allows for a simple and accurate analysis of RTD-based oscillators to optimize them. Moreover, the dynamic capacitance of an RTD oscillator is calculated in order to describe its oscillation frequency. The measured oscillation power and frequency accurately can be described using the presented model and analysis without the need of a circuit simulator.

Abstract-Millimeter-Wave and Terahertz-Wave Applications Enabled by Photonics

Nagatsuma, T. Hisatake, S. ; Fujita, M. ; Pham, H.H.N. ; Tsuruda, K. ; Kuwano, S. ; Terada, J.
Graduate School of Engineering Science, Osaka University, Toyonaka, Japan 
http://ieeexplore.ieee.org/xpl/abstractAuthors.jsp?reload=true&arnumber=7350105

This paper describes continuous millimeter-wave and terahertz (THz)-wave applications, where telecom-based photonics technologies are efficiently employed to enhance their performance. First, 300-GHz-band wireless communications are described toward real-time error-free transmissions at 50 Gbit/s and beyond. Next, a novel approach to increase a phase measurement sensitivity in THz frequency-domain spectroscopy systems is explained, and a similar technique is successfully applied to the visualization of electric-field radiation and propagation. Finally, as a futuristic study, the manipulation of THz waves with a concept of photonic crystals and its possible applications to platforms in THz integrated systems are presented.