div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=applied-physics-letters-boston-universityhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Applied Physics Letters - Boston University loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader031vdocumentsmxreader031viewer2022012505617fc1cb4aa8ce468604c39ahtml5thumbnails1jpg width=140 height=200 divp7 December 2015 Volume 107 Number 23p paplaiporgp pApplied PhysicsLetterspdiv