Paper PC13102-61
Ultra-low-noise absorber-coupled TES detectors for infrared astronomy
21 June 2024 • 14:20 - 14:40 Japan Standard Time | Room G318/319, North - 3F
Abstract
We present recent progress in the development of ultra-low-noise Transition-Edge Sensors (TESs) pixels designed for far-infrared (~30-300µm) astronomical instruments. The TES sensitivity is maximized using phononic filters, which are sub-wavelength coherent filters that provide broadband rejection of thermal phonons emitted at the TES critical temperature, Tc~100mK. The phononic filter isolation legs are compact, ~50 µm. In a absorber-coupled bolometer suspended by four legs, the thermal conductance is reduced to achieve an NEP of less than 0.3 aW/rtHz, which is sufficient for balloon- and space-based imaging and low-resolution spectrometer instruments with cold optics. We discuss the phononic filter and TES design, the performance of the phononic-isolated TES pixels, and the advantage of these highly-sensitive absorber-coupled TES bolometers for astronomical instruments.
Presenter
NASA Goddard Space Flight Ctr. (United States)
Rostem received his PhD from University of Cambridge in 2009. He is currently at Goddard Space Flight Center where his research is focused on the development of superconducting detectors and instruments for visible to far-infrared astronomy.