Till sidans topp

Sidansvarig: Webbredaktion
Sidan uppdaterades: 2012-09-11 15:12

Tipsa en vän
Utskriftsversion

Terahertz frequency spect… - Göteborgs universitet Till startsida
Webbkarta
Till innehåll Läs mer om hur kakor används på gu.se

Terahertz frequency spectrum analysis with a nanoscale antiferromagnetic tunnel junction

Artikel i vetenskaplig tidskrift
Författare P. Y. Artemchuk
O. R. Sulymenko
S. Louis
J. Li
Roman Khymyn
E. Bankowski
T. Meitzler
V. S. Tyberkevych
A. N. Slavin
O. V. Prokopenko
Publicerad i Journal of Applied Physics
Volym 127
Nummer/häfte 6
Sidor 9
ISSN 0021-8979
Publiceringsår 2020
Publicerad vid Institutionen för fysik (GU)
Sidor 9
Språk en
Länkar dx.doi.org/10.1063/1.5140552
Ämnesord magnetoresistance, temperature, dependence, Physics
Ämneskategorier Fysik

Sammanfattning

A method to perform spectrum analysis on low power signals between 0.1 and 10 THz is proposed. It utilizes a nanoscale antiferromagnetic tunnel junction (ATJ) that produces an oscillating tunneling anisotropic magnetoresistance, whose frequency is dependent on the magnitude of an evanescent spin current. It is first shown that the ATJ oscillation frequency can be tuned linearly with time. Then, it is shown that the ATJ output is highly dependent on matching conditions that are highly dependent on the dimensions of the dielectric tunneling barrier. Spectrum analysis can be performed by using an appropriately designed ATJ, whose frequency is driven to increase linearly with time, a low pass filter, and a matched filter. This method of THz spectrum analysis, if realized in the experiment, will allow miniaturized electronics to rapidly analyze low power signals with a simple algorithm. It is also found by simulation and analytical theories that for an ATJ with a 0.09 mu m(2) footprint, spectrum analysis can be performed over a 0:25 THz bandwidth in just 25 ns on signals that are at the Johnson-Nyquist thermal noise floor. Published under license by AIP Publishing.

Sidansvarig: Webbredaktion|Sidan uppdaterades: 2012-09-11
Dela:

På Göteborgs universitet använder vi kakor (cookies) för att webbplatsen ska fungera på ett bra sätt för dig. Genom att surfa vidare godkänner du att vi använder kakor.  Vad är kakor?