Two-layer anti-reflection coating with mullite and polyimide foam for large-diameter cryogenic infrared filters

Infrared Filters for Cryogenic Receivers

Cryogenic Permeability of Polyimide Shells

Polyimide shells are used as targets in Inertial Confinement Fusion (ICF) experiments. These shells are filled with DT gas, then cooled to low temperatures for cryogenic laser shots. During target preparation, shells require careful pressure and temperature control due to their sensitivity. The pressure is governed partly by permeation through the shell wall, which can only be determined with t...

An Anti-Reflection Coating for Silicon Optics at Terahertz Frequencies

A method for reducing the reflections from silicon optics at terahertz frequencies has been investigated. In this study, we used thin films of parylene as an anti-reflection (AR) layer for silicon optics and show low-loss behavior well above 1 THz. Transmittance spectra are acquired on double-sided-parylene-coated, high-resistivity, single-crystal silicon etalons between 0.45 THz and 2.8 THz. M...

Anti-Reflection Coating for Nitrogen-Vacancy Optical Measurements in Diamond

We realize anti-reflection (AR) coatings for optical excitation and fluorescence measurements of nitrogen-vacancy (NV) color centers in bulk diamond by depositing quarter-wavelength thick silica layers on the diamond surface. These AR coatings improve NV-diamond optical measurements by reducing optical reflection at the diamond-air interface from 17% to 2%, which allows more effective NV optica...

a comparison of teachers and supervisors, with respect to teacher efficacy and reflection

supervisors play an undeniable role in training teachers, before starting their professional experience by preparing them, at the initial years of their teaching by checking their work within the proper framework, and later on during their teaching by assessing their progress. but surprisingly, exploring their attributes, professional demands, and qualifications has remained a neglected theme i...