Med främjande av big data, artificiell intelligens och Internet of Things (IoT) står datasäkerhet inför allvarliga utmaningar . krypterad optisk kommunikation, ett kritiskt sätt för att säkerställa säker dataöverföring, och fotodetektorer är dess kärnkomponenter . Utveckling av bredband, hög sensitivitet är fotodetektorer är dess väsentliga komponenter . Utveckling av bredband, hög sensitivitet fotodetektorer är dess väsentliga tillämpning av säkra på säkra öppningar. communication. Self-powered photodetectors generate photocurrent under zero bias by utilizing the photovoltaic effect or the pyro-phototronic effect (PPE), not only reducing energy consumption but also improving device integration and portability, making them particularly suitable for encrypted optical communication systems. The pyro-phototronic effect leverages Ljusinducerade termiska effekter för att generera övergående polarisationsfält, vilket förbättrar separerings- och transporteffektiviteten hos fotogenererade bärare .
Recently, a research team from Harbin Institute of Technology (HIT) developed a self-powered photodetector based on a Ga2O3/CdS heterojunction, which utilizes the pyro-phototronic effect to achieve broadband response from 200 nm to 1100 nm, breaking through the limitations of the material's intrinsic bandgap. Compared to devices relying solely on the photovoltaic effect, this self-powered photodetector exhibits significantly improved responsivity and specific detectivity under illumination at all wavelengths, with a particularly notable 536% performance enhancement under 460 nm light. Furthermore, programmable logic gates were constructed by exploiting the light-responsive characteristics of the pyro-phototronic effect, successfully implementing three logic functions-"AND," "OR," and "XOR"-on the same device, enabling information encryption and decoding. This study not only advances the theoretical understanding and application scope of the pyro-phototronic effect but also provides a novel strategy for efficient and secure encrypted optical communication. The research was published in the Chemical Engineering Journal under the title *"A programmable logic gate constructed with GA2O3/CDS självdriven fotodetektor baserat på den pyro-fototroniska effekten: en ny väg för att uppnå säker krypterad optisk kommunikation . "*
This study successfully developed a self-powered photodetector based on a Ga2O3/CdS heterojunction, achieving broadband response from 200 nm to 1100 nm through the pyro-phototronic effect, significantly surpassing the material's bandgap limitations. The photodetector demonstrates outstanding performance in multi-band detection, logic operations, and encrypted communication, validating its potential in secure communication, IoT, and portable devices. The findings highlight the immense promise of the pyro-phototronic effect in photodetection and signal processing, offering new insights for developing efficient, broadband, and self-powered optoelectronic integrated systems. In the future, by optimizing fabrication processes and material stability, this technology is expected to drive the commercialization of next-generation Optisk kommunikationsteknik .