Advancing Detector Shielding with Thermo-Optic Defocusing in PMMA Integrated on Silicon Nitride. - Soon Thor Lim; Thomas Y. L. Ang; Zifeng Yuan; Thanh Xuan Hoang; Dewen Zhang; Ching Eng Png; Aaron J. Danner; Gandhi Alagappan (PHOTOPTICS, 2025)