How Does A Resonant Tunneling Diode Work

The resonant tunneling diode rtd has been widely studied because of its importance in the field of nanoelectronic science and technology and its potential applications in very high speed. Leo esaki invented the tunnel diode in august 1957.

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Rtds have been shown to achieve a.

How does a resonant tunneling diode work. The germanium material is basically used to make tunnel diodes. The resonant tunneling diode rtd has achieved some of the highest frequencies of any solid state oscillator. They consist of extremely thin semiconductor heterolayers with thicknesses of 1 to 10 nm.

Rtds are characterized by unique currentvoltage characteristics showing negative differential resistance ndr. According to wikipedia a tunnel diode is a pn junction whose energies are shifted with bias while a resonant tunneling diode is a quantum well between a double barrier whose energies change with bias. A resonant tunneling diode rtd is a diode with a resonant tunneling structure in which electrons can tunnel through some resonant states at certain energy levels.

They can also be made from gallium arsenide and silicon materials. A tunnel diode is also known as eskari diode and it is a highly doped semiconductor that is capable of very fast operation. A resonant tunneling diode rtd exploits such effects.

Another type of tunnel diode is a metalinsulatorinsulatormetal miim diode where an additional insulator layer allows step tunneling for more precise control of the diode. Integration of rtds with mosfets provides high speed operation due to the inherently fast tunneling process and negative differential resistance regime ndr. The currentvoltage characteristic often exhibits negative differential resistance regions.

On the other hand using resonant tunneling diodes it is more difficult to supply high current and the output power of an oscillator is limited. An rtd can be fabricated using many different types of materials such as iii v type iv ii vi semiconductor and different types of resonant tunneling structures. Resonant tunneling diodes rtds have been a subject of considerable interest among scientists and engineers over the years due to their potential application in ultra high speed low power electronics and the rather intriguing property of negative differential resistance ndr exhibited in their currentvoltage iv characteristics.

A particularly useful form of a tunneling diode is the resonant tunneling diode rtd. Tunneling diodes tds have been widely studied for their importance in achieving very high speed in wide band devices and circuits that are beyond conventional transistor technology.

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