Patent ID: 7684455
Filing Date: 2010-03-23
Classification: B82Y,H01L,H03B

Abstract:
1. An oscillator for oscillating an electromagnetic wave, comprising: a substrate; and a resonant tunneling diode provided on the substrate, wherein the resonant tunneling diode comprises at least two quantum well layers and plural barrier layers for separating the quantum well layers from each other, wherein the two quantum well layers each has a lattice constant different from a lattice constant of the substrate and a film thickness smaller than a critical film thickness, wherein the plural barrier layers include a first barrier layer sandwiched by the two quantum well layers; wherein the first barrier layer has such a film thickness that carriers are able to be subjected to a photon assist tunnel between sub-bands of the two quantum well layers, and wherein a strain of the first barrier layer and the two quantum well layers is compensated by a strain of a barrier layer among the plural barrier layers that is not sandwiched by the two quantum well layers.