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11.
Omar Alkhazragi Hang Lu Wenbo Yan Nawal Almaymoni Tae-Yong Park Yue Wang Tien Khee Ng Boon S. Ooi 《Annalen der Physik》2023,535(9):2300289
Random number generation (RNG) is needed for a myriad of applications ranging from secure communication encryption to numerical simulations to sports and games. However, generating truly random numbers can be elusive. Pseudorandom bit generation using computer algorithms provides a high random bit generation rate. Nevertheless, the reliance on predefined algorithms makes it deterministic and predictable once initial conditions are known. Relying on physical phenomena (such as measuring electrical noise or even rolling dice) can achieve a less predictable sequence of bits. Furthermore, if the physical phenomena originate from quantum effects, they can be truly random and completely unpredictable due to quantum indeterminacy. Traditionally, physical RNG is significantly slower than pseudorandom techniques. To meet the demand for high-speed RNG with perfect unpredictability, semiconductor light sources are adopted as parts of the sources of randomness, i.e., entropy sources, in quantum RNG (QRNG) systems. The high speed of their noise, the high efficiency, and the small scale of these devices make them ideal for chip-scale QRNG. Here, the applications and recent advances of QRNG are reviewed using semiconductor emitters. Finally, the performance of these emitters is compared and discuss their potential in future technologies. 相似文献
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Xingjia Cheng Wen Xu Hua Wen Jing Zhang Heng Zhang Haowen Li Francois M. Peeters Qingqing Chen 《Frontiers of Physics》2023,18(5):53303
Bilayer (BL) molybdenum disulfide (MoS2) is one of the most important electronic structures not only in valleytronics but also in realizing twistronic systems on the basis of the topological mosaics in moiré superlattices. In this work, BL MoS2 on sapphire substrate with 2H-stacking structure is fabricated. We apply the terahertz (THz) time-domain spectroscopy (TDS) for examining the basic optoelectronic properties of this kind of BL MoS2. The optical conductivity of BL MoS2 is obtained in temperature regime from 80 K to 280 K. Through fitting the experimental data with the theoretical formula, the key sample parameters of BL MoS2 can be determined, such as the electron density, the electronic relaxation time and the electronic localization factor. The temperature dependence of these parameters is examined and analyzed. We find that, similar to monolayer (ML) MoS2, BL MoS2 with 2H-stacking can respond strongly to THz radiation field and show semiconductor-like optoelectronic features. The theoretical calculations using density functional theory (DFT) can help us to further understand why the THz optoelectronic properties of BL MoS2 differ from those observed for ML MoS2. The results obtained from this study indicate that the THz TDS can be applied suitably to study the optoelectronic properties of BL MoS2 based twistronic systems for novel applications as optical and optoelectronic materials and devices. 相似文献
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白光有机发光二极管(OLED)是新一代健康节能照明光源,光效性能已超过荧光灯水平。自从OLED技术问世以来,研究人员陆续开展了关于OLED照明的研究工作。本文介绍了OLED照明的特点,以及国内外OLED照明发展现状,讨论了发展OLED照明技术和装备国产化所亟待解决的重大难题和面临的挑战,重点论述了发展高效大面积OLED照明器件制备技术及推动OLED照明产业化的重要意义。 相似文献
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文章简要地介绍了当今信息高科技领域中半导体微电子、光电子技术的发展现状,阐明其得以发展的物理基础是本世纪初叶提出的量子力学概念以及随后建立的固体能带论.文章还探讨了其今后进一步发展的前景. 相似文献
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Will polytellurophenes bridge the gap between conjugated polymer and inorganic solid‐state semiconductors? Polytellurophenes are a virtually unexplored class of conjugated polymer. In this paper, the synthetic methodologies that have been used to prepare polytellurophenes are chronicled. The properties of the resulting polymers are discussed and their potential for use as electronic materials is evaluated. It is far too early to know if these materials will lead to a useful class of thin‐film semiconductors, however some key challenges associated with their synthesis and implementation are outlined. These challenges will need to be addressed as the conjugated polymer research community begins to utilize this area of the periodic table.
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21世纪舰船光电技术展望 总被引:1,自引:1,他引:0
舰船光电技术将为未来海战场提供强有力的技术支撑,已成为各国竞相研发的重点。简要回顾了光电子技术的发展,立足光电技术发展前沿,结合当前战略热点和未来海战场的特点,针对未来海战场的战术技术需求,提出了全光侦察监视、全光警戒探测、全光导航、全光信息处理、光子信息弹药、智能光电蒙皮、光电隐身、激光通信与量子通信、激光光子站、激光天气武器等未来舰船光电技术及装备的重点发展方向。 相似文献
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Arun K. Agarwal 《Fiber and Integrated Optics》2013,32(1):27-53
The present trends are toward implementation of fiber optics in data-distribution networks such as data buses, community antenna television, and local area networks. The thrust is, therefore, on high-volume and economical production of good quality optical fiber couplers. This paper reviews the various techniques for making fiber couplers. Important characteristics of various constructions and configurations together with their merits and demerits are discussed. 相似文献