Related Experiment Video
Updated: Jul 12, 2025

Long-range Channelrhodopsin-assisted Circuit Mapping of Inferior Colliculus Neurons with Blue and Red-shifted Channelrhodopsins
Published on: February 7, 2020
Investigations on artificially extending the spectral range of natural vision
Abhijith Krishnan1, C S Deepak1, K S Narayan
1Chemistry and Physics of Materials Unit (CPMU), JNCASR, Bangalore, India.
Abstract:
Organic semiconductors are being explored as retinal prosthetics with the prime attributes of bio-compatibility and conformability for seamless integration with the retina. These polymer-based artificial photoreceptor films are self-powered with light-induced signal strength sufficient to elicit neuronal firing events. The molecular aspect of these semiconductors provides wide spectral tunability. Here, we present results from a bulk heterostructure semiconductor blend with a wide spectral response range. This combination elicits clear spiking activity from a developing blind-chick embryonic retina in the subretinal configuration in response to white light. The response is largely triggered by the blue-green spectral regime rather than the red-NIR regime for the present polymer semiconductor layer attributes.
Related Concept Videos
Color Vision
Photoreceptors and Visual Pathways
UV–Vis Spectroscopy of Conjugated Systems
One of the factors influencing λmax is the extent...
Vision
Depth Perception and Spatial Vision

