Low Tc IrPt TES Light Detectors for CUPID*

The Cryogenic Underground Observatory for Rare Events (CUORE) is currently searching for lepton number violating physics at the Laboratori Nazionali del Gran Sasso (LNGS). CUORE is comprised of 988 TeO2 crystals operated as cryogenic bolometers with NTD Ge thermistors. The CUORE Upgrade with Particle ID (CUPID) experiment will aim to improve upon the CUORE background by a factor of 1000 and will have event by event discrimination for $\alpha$ and $\beta$ interactions in the crystal. This will be accomplished via the collection of both heat and scintillation light signals. In order to meet the timing and energy resolution requirements, low-Tc transition edge sensors (TES) are a promising technology to use. This talk presents the status of ongoing R&D in developing a novel IrPt bilayer TES to use as a light detector.