Conceptual design of spin wave logic gates based on a Mach–Zehnder-type spin wave interferometer for universal logic functions

Abstract

Articles you may be interested inPolarization-based all-optical logic controlled-NOT, XOR, and XNOR gates employing electro-optic effect in periodically poled lithium niobate Appl. Phys. Lett. 99, 161117 (2011) We present conceptual designs of an emerging class of logic gates, including NOT, NOR, and NAND, that use traveling spin waves ͑SWs͒ in the gigahertz range and that are based on a MachZehnder-type SW ͑MZSW͒ interferometer. In this MZSW interferometer, logical input and output signals are achievable by the application of currents in order to control the phases that are accumulated by propagating SWs and by either destructive or constructive SW interference, respectively. In this article, the operation mechanism underlying a NOT gate function using a single MZSW interferometer is described and demonstrated numerically. The MZSW interferometer can itself become a NOT gate and be combined in its parallel and serial configurations to form NAND and NOR gates, respectively, which represent emerging classes of universal logic functions for microwave information signal processing.

Realization of a spin-wave multiplexer

“…The need for such external magnetic fields has hampered the development of spin-wave devices that are based on combining spin waves in two dimensions. Thus, even though simulations of nanometre-sized Mach-Zehnder-type interferometers demonstrate the feasibility to build spin-wave logic gates 15,16 , their realization to date has only been accomplished on the millimetre scale 17 .…”

Magnonic Logic Devices

“…NOT, NOR, NAND) can be built by integrating the Mach-Zehnder interferometers as proposed in Ref. [52]. It should be noted, that in the considered scheme the input logic state is represented by the amplitude of the electric current and the output state is assigned to the amplitude of the spin wave signal A, which implies an additional element for spin wave to electric current conversion.…”

“…[52]. It should be noted that the phase shifters used in the interferometer-based circuits [52] and shifters used for circuit reconfi guration [14] have different operation frequency. The shifters used in the interferometers-based switches may be needed in every computational step and have to sustain high-frequency operation.…”

“…This problem may be solved in part by using the optimized structure presented in Ref. [52]. It should be noted that the phase shifters used in the interferometer-based circuits [52] and shifters used for circuit reconfi guration [14] have different operation frequency.…”

“…The operation of the interferometer-based logic devices [50][51][52] depends on this element. A reconfi gurable magnonic circuits would also require such an element [14].…”