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Laser induced magnetization reversal for detection in optical interconnects

Research output: Contribution to journalArticlepeer-review

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Publication details

JournalIeee electron device letters
DatePublished - 1 Dec 2014
Issue number12
Number of pages3
Pages (from-to)1317-1319
Original languageEnglish


Optical interconnect has emerged as the front-runner to replace electrical interconnect especially for off-chip communication. However, a major drawback with optical interconnects is the need for photodetectors and amplifiers at the receiver, implemented usually by direct bandgap semiconductors and analog CMOS circuits, leading to large energy consumption and slow operating time. In this letter, we propose a new optical interconnect architecture that uses a magnetic tunnel junction (MTJ) at the receiver side that is switched by femtosecond laser pulses. The state of the MTJ can be sensed using simple digital CMOS latches, resulting in significant improvement in energy consumption. Moreover, magnetization in the MTJ can be switched on the picoseconds time-scale and our design can operate at a speed of 5 Gb/s for a single link.

    Research areas

  • Complementary metal-oxide-semiconductor (CMOS), Magnetic tunnel junction (MTJ), Non-equilibrium Green's function (NEGF), Rare Earth (RE)Transition Metal (TM) ferrimagnetic materials

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