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A Flexible High-Performance Photoimaging Device Based on Bioinspired Hierarchical Multiple-Patterned Plasmonic

Yoon Ho Lee¹, Tae Kyung Lee², Hongki Kim¹

¹Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Korea.

Small (Weinheim an Der Bergstrasse, Germany)

|February 9, 2018

Summary

Inspired by insect eyes, this study developed a flexible photoimaging device. This device enhances light detection and signal recording using hierarchical, patterned structures for improved optoelectronic performance.

Keywords:

discrete dipole approximation calculation organic optoelectronic devices photoimaging devices plasmonic effect scanning near-field optical microscopy

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Area of Science:

Optoelectronics
Biomimetic Engineering
Materials Science

Background:

Insect ommatidia feature hierarchical structures crucial for visual signal processing.
Mimicking these structures can enhance photonic device performance.

Purpose of the Study:

To develop a flexible photoimaging device inspired by insect ommatidia.
To improve light detection and signal recording capabilities.

Main Methods:

Vertically stacking an organic photodiode and resistive memory device.
Incorporating a hierarchical, multiple-patterned back reflector with plasmonic effects.
Utilizing theoretical calculations and scanning near-field optical microscopy.

Main Results:

Enhanced photoresponsivity in multiple-patterned flexible organic photodiodes due to increased light absorption.
Well-resolved spatiotemporal mapping of optical signals at low driving voltages.
Demonstrated superior surface plasmon coupling in multiple-patterned electrodes compared to flat and single-patterned systems.

Conclusions:

The developed flexible photoimaging device offers high performance and stability.
The biomimetic hierarchical patterning approach is effective for advanced optoelectronic systems.
This methodology provides a versatile route for high-performance photonic devices.