Teaching “stay” becomes easier when the dog begins on a clearly defined raised platform. From there, the same concept can be applied gradually to sitting, lying down and walking beside the owner. This ...

The Illinois approach is a route torward high-performance QPCSELs that are versatile and geometry independent. Courtesy of Illinois Grainer / Unsplash / CCO Public Domain. Over the past two decades, ...

Over the past two decades, photonic-crystal surface-emitting lasers (PCSELs) have shown promise as a type of advanced semiconductor laser useful in defense- and aerospace-related applications.