Detection of degree scale B-modes by BICEP/KeckOn March 17, 2014, our team announced a detection of degree-scale B-mode polarization using the BICEP-1, BICEP-2, and (preliminarily) Keck Array cameras. I gave a plenary talk on this discovery at the International Conference on High Energy Physics (ICHEP) in Valencia last July, which you can check out here.
This achievement was made possible through a revolution in our detector technology over the past decade. Using thin-film photo-lithographic techniques, we have built a new generation of detectors that couple integrated millimeter-wave circuits to superconducting detectors. This technology has allowed us to aggressively increase the speed with which we map the sky at millimeter wavelengths. We will deploy the BICEP-3 telescope this winter with similar detectors but at a different color and map the same fields as already mapped by its predecessor experiments, Keck and BICEP-2. These cameras' design and related detectors are highly scalable.