Realization of high efficiency ultrasound-powered micro-LEDs for optogenetics

Simple item page
dc.contributor.authorMondal, Tanmay
dc.contributor.authorLaursen, Kjeld
dc.contributor.authorHosseini, Seyedsina
dc.contributor.authorRashidi, Amin
dc.contributor.authorMoradi, Farshad
dc.contributor.authorCorbett, Brian
dc.contributor.funderHorizon 2020en
dc.date.accessioned2021-09-27T13:31:36Z
dc.date.available2021-09-27T13:31:36Z
dc.date.issued2020-04-02
dc.date.updated2021-09-27T13:15:10Z
dc.description.abstractWe present the fabrication, characterization, and demonstration of high-efficiency ultrasound-powered micro- light emitting diodes (μLED) for use in optogenetic applications. InGaN based blue-emitting LED material wafers grown on a patterned sapphire substrate (PSS) were used to assist in the out-scattering of the light. The turn-on voltage of the LEDs is around 2.5 volts and the electrical ideality factor is 1.2 confirming high radiative recombination efficiency. A power density of more than 50 mW/mm2 was obtained from a 130 x 300 μm2 LED with a mesa of 100 μm diameter at 3 mA which is much more than is required to excite channelrhodopsin transfected neural cells. A high external quantum efficiency (EQE) of 33% is obtained at 3 mA measured in an integrating sphere. The peak wavelength of the μLED was measured at 483 nm at different current densities. The μLEDs are integrated directly onto a rectifier and Piezoelectric Transducer (PZT) harvester to realise a highly efficient ultrasound-powered light delivery unit capable to generate mWs of optical power. The concept was validated by powering the integrated device with ultrasound.en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid113641Ien
dc.identifier.citationMondal, T., Laursen, K., Hosseini, S., Rashidi, A., Moradi, F. and Corbett, B. (2020) 'Realization of high efficiency ultrasound-powered micro-LEDs for optogenetics', SPIE Photonics Europe, Strasbourg, France, 29 March - 2 April, Proceedings of SPIE, Volume 11364: Integrated Photonics Platforms: Fundamental Research, Manufacturing and Applications, 113641I (8pp) doi: 10.1117/12.2555762en
dc.identifier.doi10.1117/12.2555762en
dc.identifier.eissn1996-756X
dc.identifier.endpage8en
dc.identifier.issn0277-786X
dc.identifier.journaltitleProceedings of SPIEen
dc.identifier.startpage1en
dc.identifier.urihttps://hdl.handle.net/10468/12015
dc.identifier.volume11364en
dc.language.isoenen
dc.publisherSociety of Photo-Optical Instrumentation Engineers (SPIE)en
dc.relation.ispartofSPIE Photonics Europe 2020, Strasbourg, France, 29 March - 2 April
dc.relation.projectinfo:eu-repo/grantAgreement/EC/H2020::RIA/767092/EU/in vivo optogeneticS, elecTrophysiology and phArmacology with an ultRasonically-powered DUST for Parkinson's Disease/STARDUSTen
dc.rights© 2020, Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.en
dc.subjectEfficiencyen
dc.subjectImplantable deviceen
dc.subjectOptogeneticsen
dc.subjectUltrasound poweringen
dc.subjectPZTen
dc.subjectRectifieren
dc.subjectμLEDen
dc.titleRealization of high efficiency ultrasound-powered micro-LEDs for optogeneticsen
dc.typeConference itemen
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
12543_113641I.pdf
Size:
2.79 MB
Format:
Adobe Portable Document Format
Description:
Published Version
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
2.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Tyndall National Institute - Conference Items