Scanning electron microscope image of an array of optomechanical accelerometer devices formed in the surface of a silicon microchip. Highlighted green areas represent proof masses which are suspended by nanoscale tethers across the open etched areas of the chip. Even smaller, and barely visible, are pink highlighted optical cavities which sensitively read out the motion of the proof masses. (Credit: Martin Winger)

TechAndComputer (Oct. 17, 2012) — Imagine navigating through a grocery store with your cell phone. As you turn down the bread aisle, ads and coupons for hot dog buns and English muffins pop up on your screen. The electronics industry would like to make such personal navigators a reality, but, to do so...