Volume 94, Number 4, May 2011
|Number of page(s)||5|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||18 May 2011|
Operation of resonant-tunnelling oscillators beyond tunnel lifetime limit
Technische Universität Darmstadt - Merckstr. 25, 64283 Darmstadt, Germany, EU
2 ACST GmbH - Merckstr. 25, 64283 Darmstadt, Germany, EU
Accepted: 12 April 2011
The tunnel lifetime of the electrons in the quantum well of a resonant-tunnelling diode (RTD) is usually assumed to be imposing an inherent fundamental limitation on the operating frequencies of RTD oscillators. Here, we experimentally demonstrate that one can overcome the limitation by heavy doping of the RTD collector. We present RTD oscillators with the fundamental oscillation frequency up to a factor of 3 above the tunnel lifetime limitation. Our results indicate that the inherent frequency limitations of RTDs should lie far above the state-of-the-art frequency of the contemporary RTD oscillators.
PACS: 85.30.Mn – Junction breakdown and tunneling devices (including resonance tunneling devices) / 73.40.Gk – Tunneling / 85.35.Be – Quantum well devices (quantum dots, quantum wires, etc.)
© EPLA, 2011
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.