Non-contact sensing system based on GaN optoelectronic chip

As the global spread of COVID-19becomesarapidly19 becomes a rapidly evolvingcrisis,thedevelopmentofcontactlesssharedevolving crisis, the development of contactless shared interactivedisplaysisanurgentiinteractive displays is an urgent issuetoreducetheriskofssue to reduce the risk of viralandbacterialcrosscontaminationduetotheuseofviral and bacterial cross contamination due to the use of touchtouch -operatedshareduserterminals.Here,weoperated shared user terminals. Here, we experimentallydemonstrateacontactlessuserterminalexperimentally demonstrate a contactless user terminal fabricatedwithamonolithicGaNOptoelectronicsystemfabricated with a monolithic GaN Optoelectronic system (MGOS),which(MGOS), which integratesthetransmitterandreceiverintointegrates the transmitter and receiver into asinglechip.a single chip. TheinherentspectralemissionThe inherent spectral emission-responsivenessresponsiveness overlapofGaNQWdiodesgivesthedeviceauniqueabilityoverlap of GaN QW diodes gives the device a unique ability todetectlighttransmittedbydiodesthatsharethesameQWto detect light transmitted by diodes that share the same QW structure.WhentheGaNtransmstructure. When the GaN transm itteremitslighttoitter emits light to illuminateanexternalobject,theintegratedGaNreceiverilluminate an external object, the integrated GaN receiver candetectthereflectedlightencodingtheinformationandcan detect the reflected light encoding the information and converttheopticalsignalintoanelectricalsignal,sothatconvert the optical signal into an electrical signal, so that thenonthe non--contactuserterminalhastheabilitytouselcontact user terminal has the ability to use lightforight for bidirectionaldatacommunication.Comparedtotraditionalbidirectional data communication. Compared to traditional handwritingsystems,theseterminalsoperateascontactlesshandwriting systems, these terminals operate as contactless informationentrydevicesthatcanhelpreducepotentialinformation entry devices that can help reduce potential crosscross--contaminationduetocontactwithhandwritingcontamination due to contact with handwriting terminals,providepterminals, provide precautionstokeeptheenvironmentrecautions to keep the environment clean,andhelppreventvirustransmission.clean, and help prevent virus transmission.