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Terahertz mixing in MgB2 microbolometers

Sergey Cherednichenko (Institutionen för mikroteknologi och nanovetenskap, Mikrovågs- och terahertzteknologi) ; Vladimir Drakinskiy (Institutionen för mikroteknologi och nanovetenskap, Mikrovågs- och terahertzteknologi) ; Kenji Ueda ; Michio Naito
Applied Physics Letters (0003-6951). Vol. 90 (2007), 2,
[Artikel, refereegranskad vetenskaplig]

Authors report on a terahertz (600 GHz) mixing experiment with MgB2 microbolometers in the resistive state. We observed that for a 20 nm film a mixer gain bandwidth of 2.3 GHz can be achieved, corresponding to an energy relaxation time of 70 ps. The experimental results were analyzed using a two-temperature model. As a result, the phonon escape time  20 ps was deduced. At 1.6THz the MgB2 mixer uncorrected noise temperature was 11000K. The obtained results show that MgB2 bolometers are good prospects for the terahertz range as both broadband mixers and fast direct detectors.

Nyckelord: MgB2, superconducting films, terahertz, mixer, acoustic matching



Denna post skapades 2007-03-08.
CPL Pubid: 24812

 

Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Mikrovågs- och terahertzteknologi (2006-2007)

Ämnesområden

Supraledning

Chalmers infrastruktur