Photosensitive Nanodiscs Composed of Human Photoreceptors for Refractive Index Modulation at Selective Wavelengths

Byeongho Park, Yeon Kyung Cha, Jisung Kwak, Kyeong Seob Hwang, Hyo Suk Kim, Subeen Park, Yusin Pak, Tai Hyun Park, Hyun Seok Song, Jae Hun Kim

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

A photoreceptor on the retina acts as an optical waveguide to transfer an individual photonic signal to the cell inside, which is determined by the refractive index of internal materials. Under the photoactivation of photoreceptors making conformational and chemical variation in a visual cell, the optical signal modulation is demonstrated using an artificial photoreceptor-based waveguide with a controlling beam refraction. Two types of nanodiscs are made of human photoreceptor proteins, short-wavelength-sensitive opsin and rhodopsin, with spectral sensitivity. The refractive index and nonlinear features of those two photosensitive nanodiscs are investigated as fundamental properties. The photonanodiscs are photoactivated in such a way that allow refractive index tuning over 0.18 according to the biological function of the respective proteins with color-dependent response.

Original languageEnglish
Pages (from-to)6825-6832
Number of pages8
JournalNano Letters
Volume22
Issue number16
DOIs
StatePublished - 24 Aug 2022

Bibliographical note

Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.

Keywords

  • human photoreceptor
  • nanodisc
  • optical application
  • refractive index modulation
  • selective photoactivation

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