3D-Printed Dual-Color Optogenetic Neural Stimulator

Keonghwan Oh, Sohmyung Ha

Research output: Contribution to journalArticlepeer-review


In this letter, we present an optical neural stimulator that utilizes a 3D-printed substrate integrated with conductive wires for electrical connections and micro light-emitting diodes (μ LEDs) for optogenetic stimulation. The proposed device includes two different color LEDs for excitation and inhibition of the targeted neurons on the single optogenetic electrode (optrode). The proposed device is unique in that it is built mainly with 3D-printed custom-made components without the need for microfabrication techniques, allowing for the easy design and manufacture of small, complex shapes without the use of clean-room facilities. The total thickness of the device is just 85μm, generating enough light intensity to excite and inhibit the neurons. The measured electrical, optical, and thermal properties of the device validate the device's characteristics and functionality.

Original languageEnglish (US)
Pages (from-to)401-404
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number6
StatePublished - Mar 15 2024


  • 3D-printing neural probe
  • Optogenetics
  • implantable devices
  • optical neural modulation
  • optoelectronics device

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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