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Physically unclonable function (PUF) is a novel physical security object consisting of disordered structure that cannot feasibly be cloned. It is a very promising and trustworthy solution for the field of hardware security. Here we present a simulation of disordered photonic PUF by calculating the scattered distribution of the electromagnetic field. The uniqueness and tamper-evident properties of disordered photonic PUF are demonstrated, which are very important for many applications such as secure authentication, identification and cryptographic key generation. [ABSTRACT FROM AUTHOR]

Sub-wavelength metal-insulator-metal (MIM) concentric ring grating structure has been introduced to couple with superconducting single photon detector (SSPD) to enhance its response. The effects of the coupling structure parameters on the enhancement factor have been studied systematically. Our numerical simulation results show that the optical density arriving at the detection area of SSPD can be greatly enhanced by the structure of MIM concentric ring grating, corresponding to the improvement of detection response of the detector. A high enhancement factor more than 40 times can be obtained at wavelength of $$1.55~\upmu \hbox {m}$$ with proper structure parameters. [ABSTRACT FROM AUTHOR]