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\section{Introduction}  First proposed in 1973 by Tsu and Esaki, resonant tunneling has since become a very well understood and well utilized property in devices. Due to the microfabrication capabilities at the time, the devices that could be created were too thick and defective to properly utilized this effect. Early experiment on this effect were promising, but only showed weak features at unrealistically low temperatures. However, since then microfabrication techniques has greatly improved and tunneling effects can now be well observed and utilized in devices. One of the primary uses of this property is in the \textit{resonant tunneling diode}(RTD), in which the double potential barrier system allows for great diode control and usefulness in devices.  \textit{Oh, an empty article!}   You can get started by \textbf{double clicking} this text block and begin editing. You can also click the \textbf{Text} button below to add new block elements. Or you can \textbf{drag and drop an image} right onto this text. Happy writing!