The contradiction between the high number of visually handicapped people and the scarcity of guide dogs has stimulated the demand for electronic guide dogs(EGDs).Here,we demonstrate an EGD by leveraging piezoresistors...The contradiction between the high number of visually handicapped people and the scarcity of guide dogs has stimulated the demand for electronic guide dogs(EGDs).Here,we demonstrate an EGD by leveraging piezoresistors on a MoS_(2)/Ge heterostructure for simultaneous pressure-sensing and optical-sensing functions.The device has excellent gating capability and exhibits large positive and negative photoresponses under visible(532 nm,182 A/W)and infrared(1550 nm,37 A/W)illumination.These characteristics allow the device to efficiently classify different obstacles at all times of day using pressure and light signals.The device reaches nearly 100%accuracy after 48 training sessions when used to classify frequent scenes.The device adopts passive and active detection modes during the day and night,respectively,which improves the battery life of the EGD.This work provides a significant reference for the future design of EGDs,which may help a greater number of visually impaired people by reducing the cost of such devices.展开更多
A two-dimensional(2D)model for the subthreshold current in the dual-material gate(DMG)siliconon-insulator(SOI)MOSFET with a single halo is presented.The model considers single halo doping in the channel near the sourc...A two-dimensional(2D)model for the subthreshold current in the dual-material gate(DMG)siliconon-insulator(SOI)MOSFET with a single halo is presented.The model considers single halo doping in the channel near the source and a dual-material gate to derive the channel potential using the explicit solution of the 2D Poisson’s equation.Together with the conventional driftdiffusion theory,this results in the development of a subthreshold current model for the novel structure.Model verification is carried out using the 2D device simulator ISE.Excellent agreement is obtained between the calculations and the simulated results of the model.展开更多
基金supported by the National Natural Science Basic Research Program of Shaanxi(No.2022JQ-650)the Natural Science Foundation of China(NSFC)(No.62204188)the Cooperation Program of XDU-Chongqing IC Innovation Research Institute(No.CQIRI-CXYHT-2022-13)。
文摘The contradiction between the high number of visually handicapped people and the scarcity of guide dogs has stimulated the demand for electronic guide dogs(EGDs).Here,we demonstrate an EGD by leveraging piezoresistors on a MoS_(2)/Ge heterostructure for simultaneous pressure-sensing and optical-sensing functions.The device has excellent gating capability and exhibits large positive and negative photoresponses under visible(532 nm,182 A/W)and infrared(1550 nm,37 A/W)illumination.These characteristics allow the device to efficiently classify different obstacles at all times of day using pressure and light signals.The device reaches nearly 100%accuracy after 48 training sessions when used to classify frequent scenes.The device adopts passive and active detection modes during the day and night,respectively,which improves the battery life of the EGD.This work provides a significant reference for the future design of EGDs,which may help a greater number of visually impaired people by reducing the cost of such devices.
基金supported by the National Natural Science Foundation of China (Grant No.60206006).
文摘A two-dimensional(2D)model for the subthreshold current in the dual-material gate(DMG)siliconon-insulator(SOI)MOSFET with a single halo is presented.The model considers single halo doping in the channel near the source and a dual-material gate to derive the channel potential using the explicit solution of the 2D Poisson’s equation.Together with the conventional driftdiffusion theory,this results in the development of a subthreshold current model for the novel structure.Model verification is carried out using the 2D device simulator ISE.Excellent agreement is obtained between the calculations and the simulated results of the model.