[Legacy Report] IEEE seminar by Shashank Pandey on "Terahertz Photonics: Future of Electronics"
With the ever increasing demand for faster clock speed and miniature sized
communication and handheld devices, it requires a shift in technology from
Gigahertz to Terahertz (THz). This spectral region spans from 100 GHz to 10
THz and is of great scientific interest and technological importance. In
the realm of scientific quest, rotational and vibrational modes in
molecular systems and wide variety of excitation in condensed media lie in
this frequency range. While from a technological point of view, the ongoing
increase in clock speeds clearly points to a future when not only devices,
but also systems will operate at THz frequencies.
This talk would encompass various devices (passive and active) which have
been designed, fabricated and characterized as a part of my graduate
research. The operational principle of the device is based on collective
excitation mode of electromagnetic radiation at the interface of metal and
dielectric, more popularly known as surface plasmon polaritons. Metal
surfaces structured with special patterns (metamaterials) permits to
engineer the dispersion relationship of the medium and thus providing
control over the flow of electromagnetic radiation in such devices. Devices
with functional operation ranging from point to point communication to
perfect lensing would be discussed. Unconventional methods including inkjet
and 3D printing which obviate the need for a clean room (nanofabrication)
to fabricate these devices and also, the use of new plasmonic materials
where the future of Terhaertz plasmonic devices is headed would be
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