GIST Scholar
College of Artificial Intelligence
Department of Electrical Engineering and Computer Science
2. Conference Papers
Universal Self-aligned Waveguide for an Amphibious Imaging System Inspired by the Compound Eye of the Fiddler Crab
- Type
- Conference Paper
- Citation
- 2023 MRS Fall Meeting & Exhibit
- Issued Date
- 2023-11-28
- Abstract
- Here, inspired by the fiddler crab's eye, we introduce an amphibious artificial ommatidium with self-aligned waveguide. The artificial ommatidium comprise a self-written waveguide (i.e., crystalline cone) and a flat micro-lens array (MLA) (i.e., corneal lens), achieved through a process involving the use of ultraviolet (UV) curing properties of a photosensitive polymer material (SU-8) and the light-focusing capability of the MLA. Prior to fabricating the SU-8 MLA, a polydimethylsiloxane (PDMS) mold with a sidewall was created using a quartz MLA mold etched through reactive ion etching. The temperature of the SU-8 material was gradually increased from 65 ℃ to 120 ℃ to ensure complete solvent evaporation, followed by spin-coating of an optical adhesive (Norland optical adhesive, NOA) onto the fabricated SU-8 MLA. Upon UV light irradiation, the exposed region underwent photo-crosslinking via post-exposure baking, resulting in an increase in RI. Meanwhile, the unexposed region experienced thermal-crosslinking through hard baking, leading to a reduction in RI (~0.008). Consequently, this process turned out to be RI change between a core and cladding structure for the waveguide (ΔnSU-8 = 0.029), with an additional spin-coating step to cover the outer layer.
- Publisher
- MRS – Materials Research Society
- Conference Place
- US
Boston, Massachusetts
- Appears in Collections:
- Department of Electrical Engineering and Computer Science > 2. Conference Papers
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