Abstract
A new class of devices consisting of a heterojunction npn transistor with a wavelength modulator and a transversal potential grating in the base region is proposed. An electron injected at high energy into the base region is modulated in wavelength due to acceleration by a signal voltage and its transmission to the collector is controlled through diffraction caused by the grating. Diffraction characteristics are analyzed to reveal the possibility of high transconductances. Furthermore, a reduced transit time, which is due to the constant flow of high-energy and collision-free electrons and an extremely small capacitance between the modulation electrodes, provides significant potential for high-speed logic applications.
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