tailieunhanh - Properties and Applications of Silicon Carbide Part 6

Tham khảo tài liệu 'properties and applications of silicon carbide part 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 7 Silicon Carbide Based Transit Time Devices The New Frontier in High-power THz Electronics Moumita Mukherjee Centre of Millimeter-wave Semiconductor Devices and Systems Institute of Radio Physics and Electronics University of Calcutta India e-mail mm_drdo@ 1. Introduction In recent years the field of Terahertz THz science and technology has entered a completely new phase of unprecedented expansion that is generating ever-growing levels of broadbased international attention. Indeed the plethora of activities that have arisen recently in both the technology and scientific arenas associated with the THz frequency domain - . between 1 millimeter 300 GHz and 100 micrometers 3 THz suggest that the field might be attempting to undergo a dramatic transition that could lead to long-awaited payoffs in a number of application areas. The inherent advantages and potential payoffs of the THz regime for military security as well as industry relevant applications have long stood as an important driver of interest in this science and technology area. This extremely expansive and spectrally unique portion of the EM spectrum had initial application in space-based communications upper atmospheric sensing and potentially for short-range terrestrial communications and non-intrusive package screening. However the very rapid growth in more recent years is arguably most closely linked to the potential payoffs of THz sensing and imaging for an array of military security and industrial applications. These applications include the spectroscopic-based detection identification and characterization of chemical and biological agents and materials remote and standoff early-warning for chemical-biological warfare threats and imaging of concealed weapons and explosives just to name a few. In addition THz-regime finds its application possibilities in industry and private-sector areas as food-industry process control pharmaceutical industry biological science medical diagnostics and .

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