Optical sensors with in-cell logic and memory capabilities offer new horizons in realizing machine vision beyond von Neumann architectures and have been attempted with two-dimensional materials,memristive oxides,phase...Optical sensors with in-cell logic and memory capabilities offer new horizons in realizing machine vision beyond von Neumann architectures and have been attempted with two-dimensional materials,memristive oxides,phasechanging materials etc.Noting the unparalleled performance of superconductors with both quantum-limited optical sensitivities and ultra-wide spectrum coverage,here we report a superconducting memlogic long-wave infrared sensor based on the bistability in hysteretic superconductor-normal phase transition.Driven cooperatively by electrical and optical pulses,the device offers deterministic in-sensor switching between resistive and superconducting(hence dissipationless)states with persistence>105 s.This results in a resilient reconfigurable memlogic system applicable for,e.g.,encrypted communications.Besides,a high infrared sensitivity at 12.2μm is achieved through its in-situ metamaterial perfect absorber design.Our work opens the avenue to realize all-in-one superconducting memlogic sensors,surpassing biological retina capabilities in both sensitivity and wavelength,and presents a groundbreaking opportunity to integrate visional perception capabilities into superconductor-based intelligent quantum machines.展开更多
Photodetection has attracted significant attention for information transmission.While the implementation relies primarily on the photonic detectors,they are predominantly constrained by the intrinsic bandgap of active...Photodetection has attracted significant attention for information transmission.While the implementation relies primarily on the photonic detectors,they are predominantly constrained by the intrinsic bandgap of active materials.On the other hand,photothermoelectric(PTE)detectors have garnered substantial research interest for their promising capabilities in broadband detection,owing to the self-driven photovoltages induced by the temperature differences.To get higher performances,it is crucial to localize light and heat energies for efficient conversion.However,there is limited research on the energy conversion in PTE detectors at micro/nano scale.In this study,we have achieved a twoorder-of-magnitude enhancement in photovoltage responsivity in the self-rolled tubular tellurium(Te)photodetector with PTE effect.Under illumination,the tubular device demonstrates a maximum photovoltage responsivity of 252.13 VW^(-1)and a large detectivity of 1.48×10^(11)Jones.We disclose the mechanism of the PTE conversion in the tubular structure with the assistance of theoretical simulation.In addition,the device exhibits excellent performances in wide-angle and polarization-dependent detection.This work presents an approach to remarkably improve the performance of photodetector by concentrating light and corresponding heat generated,and the proposed self-rolled devices thus hold remarkable promises for next-generation on-chip photodetection.展开更多
基金the following funding:National Natural Science Foundation of China(NSFC)(12027805,11991060)the Shanghai Science and Technology Committee(18JC1420400,20JC1414700 and 20DZ1100604)Shanghai Pujiang Program(20PJ1410900).
文摘Optical sensors with in-cell logic and memory capabilities offer new horizons in realizing machine vision beyond von Neumann architectures and have been attempted with two-dimensional materials,memristive oxides,phasechanging materials etc.Noting the unparalleled performance of superconductors with both quantum-limited optical sensitivities and ultra-wide spectrum coverage,here we report a superconducting memlogic long-wave infrared sensor based on the bistability in hysteretic superconductor-normal phase transition.Driven cooperatively by electrical and optical pulses,the device offers deterministic in-sensor switching between resistive and superconducting(hence dissipationless)states with persistence>105 s.This results in a resilient reconfigurable memlogic system applicable for,e.g.,encrypted communications.Besides,a high infrared sensitivity at 12.2μm is achieved through its in-situ metamaterial perfect absorber design.Our work opens the avenue to realize all-in-one superconducting memlogic sensors,surpassing biological retina capabilities in both sensitivity and wavelength,and presents a groundbreaking opportunity to integrate visional perception capabilities into superconductor-based intelligent quantum machines.
基金supported by the National Key Technologies R&D Program of China(Nos.2021YFA0715302 and 2021YFE0191800)the National Natural Science Foundation of China(No.62375054)+1 种基金the Science and Technology Commission of Shanghai Municipality(No.22ZR1405000)Fudan Nano-fabrication Laboratory,ShanghaiTech Quantum Device Lab,and ShanghaiTech Soft Matter Nanofab(No.SMN180827).
文摘Photodetection has attracted significant attention for information transmission.While the implementation relies primarily on the photonic detectors,they are predominantly constrained by the intrinsic bandgap of active materials.On the other hand,photothermoelectric(PTE)detectors have garnered substantial research interest for their promising capabilities in broadband detection,owing to the self-driven photovoltages induced by the temperature differences.To get higher performances,it is crucial to localize light and heat energies for efficient conversion.However,there is limited research on the energy conversion in PTE detectors at micro/nano scale.In this study,we have achieved a twoorder-of-magnitude enhancement in photovoltage responsivity in the self-rolled tubular tellurium(Te)photodetector with PTE effect.Under illumination,the tubular device demonstrates a maximum photovoltage responsivity of 252.13 VW^(-1)and a large detectivity of 1.48×10^(11)Jones.We disclose the mechanism of the PTE conversion in the tubular structure with the assistance of theoretical simulation.In addition,the device exhibits excellent performances in wide-angle and polarization-dependent detection.This work presents an approach to remarkably improve the performance of photodetector by concentrating light and corresponding heat generated,and the proposed self-rolled devices thus hold remarkable promises for next-generation on-chip photodetection.
