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RESEARCH PRODUCT
Optimal operation of transition-edge sensors on ballistic membranes
T. KühnI. J. Maasiltasubject
Superconductivity (cond-mat.supr-con)Condensed Matter - Mesoscale and Nanoscale PhysicsCondensed Matter - SuperconductivityMesoscale and Nanoscale Physics (cond-mat.mes-hall)FOS: Physical sciencesdescription
We calculate the operating parameters of a transition edge sensor that is mounted on a thin dielectric membrane with the assumption that the phononic heat transport in the membrane is ballistic. Our treatment uses the correct phonon modes from elasticity theory (Lamb-modes), and spans the transition from 3D to 2D behavior. The phonon cooling power and conductance have a global minimum as function of membrane thickness, which leads to an optimal value for the membrane thickness with respect to noise equivalent power at a fixed operating temperature. The energy resolution of a calorimeter will not be affected strongly, but, somewhat counterintuitively, the effective time constant can be reduced by decreasing the membrane thickness in the 2D limit.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-02-23 |