High-Density Optical Data Storage Enabled by the Photonic Nanojet from a Dielectric Microsphere
نویسندگان
چکیده
We discuss the usage of the photonic nanojet to detect deeply subwavelength pits in a metal substrate for the purpose of high-density optical data storage. Three-dimensional finite-difference time-domain (FDTD) computational solutions of Maxwell’s equations are used to analyze and design the system. We find that nanojet-illuminated pits having lateral dimensions of only 100 150nm yield a 40-dB contrast ratio. The FDTD simulation results show that pit-depth modulation and pit-width modulation can significantly increase the optical datastorage capacity. # 2009 The Japan Society of Applied Physics
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تاریخ انتشار 2009