Ultrafast volume holography for stretchable photonic structures

被引:7
|
作者
Tham, Nicholas Cheng Yang [1 ,2 ]
Sahoo, Pankaj K. [1 ,2 ]
Kim, Young-Jin [1 ,2 ]
Murukeshan, Vadakke Matham [1 ,2 ]
机构
[1] Nanyang Technol Univ, Singapore Ctr 3D Printing, Sch Mech & Aerosp Engn, Singapore 639798, Singapore
[2] Nanyang Technol Univ, Sch Mech & Aerosp Engn, COLE, Singapore 639798, Singapore
来源
OPTICS EXPRESS | 2019年 / 27卷 / 09期
关键词
HEAT ACCUMULATION; LASER; FABRICATION; GRATINGS;
D O I
10.1364/OE.27.012196
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Stretchability and flexibility are two key requirements for manipulating the propagation of light in compact and high-performance lab-on-a-chip systems. These requirements am best met by embedding stretchable and flexible tuning elements such as volume phase gratings (VPGs) in polydimethylsiloxane (PDMS), making them attractive alternatives to conventional rigid optical elements. However, fabrication of these PDMS VPGs is a challenge, requiring extensive modifications to PDMS or complex multi-step processes that require long processing times. In this context, we propose the concept of "ultrafast volume holography" for the fabrication of stretchable photonic structures such as tunable VPGs directly in unmodified PDMS. Our concept translates insights in heat regulation via fs repetition rate control into volumetric patterning, forming periodic refractive index modulation of 1.95 x 10(-4) in the PDMS without post-processing. VPGs formed are further demonstrated as active beam steering units and tunable spectroscopic optical elements. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码:12196 / 12212
页数:17
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