Researchers at Harvard SEAS have built a MEMS-integrated photonic crystal device that can actively control the handedness of light passing through it. By stacking two silicon nitride photonic crystal slabs and precisely adjusting their twist angle and spacing with electrostatic actuators, the team achieved measured circular dichroism ranging from −0.85 to 0.64, with simulations showing…
Sandia National Laboratories sees surge in R&D agreements
Sandia National Laboratories executed 72 new Cooperative Research and Development Agreements (CRADAs) in fiscal year 2024, the second-highest number in its history. Sandia last reached similar levels in the early 1990s when the World Wide Web was introduced. CRADAs are collaborative agreements that allow federal laboratories and external organizations to jointly develop new technologies by…