Fast and Transparent Adaptive Lens Based on Plasmonic Heating

作者：Donner Jon S; Morales Dalmau Jordi; Alda Irene; Marty Renaud; Quidant Romain^*

来源：ACS Photonics, 2015, 2(3): 355-360.

DOI：10.1021/ph500392c

• micro-optical devices
• lenses
• adaptive imaging
• active imaging
• 3D microscopy
• thermoplasmonics

In the current trend toward miniaturization, integrated micro-optical elements play a central role in the development of various applications including high-density data storage and imaging. In these operations, fine alignment and focus adjustment are usually performed mechanically, thus, limiting the accuracy, size and speed of devices. Here, we propose a novel reconfigurable microlens based on the engineering of the temperature distribution induced by a patterned plasmonic surface shined with a resonant near-infrared light. The refractive index change generated in a surrounding thermo-optical material acts as an effective lens whose parameters are remotely adjusted by the control near-infrared light. We demonstrate focal distance tunability of tens of microns with subnanometer accuracy along with time-responses down to 200 mu s. The applicability of this photothermal lens is proved in the framework of optical microscopy and adaptive optics.

• 出版日期2015-3