div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: Applied Physics Letters - Boston University src=https:reader031fdocumentsinreader031viewer2022012505617fc1cb4aa8ce468604c39ahtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divp7 December 2015 Volume 107 Number 23p paplaiporgp pApplied PhysicsLetterspdiv