Nano Network Communications based on terahertz band
Researcher and author: Dr. ( Afshin Rashid)
Note: Connectivity between nano-devices leads to the idea of nano-networks, which provide the definition of nano-communications. Nano-communications expand the capabilities of nano-devices to enhance their features and expand the range of their applications.
One of the most promising techniques for data exchange between nano-devices is electromagnetic communication (EM) in the terahertz band , which uses the electromagnetic wave as a carrier and uses its properties such as amplitude, phase and delay to encrypt / decrypt information. Be. Possibility of EM (electromagnetic) communication based on the fact that the terahertz band can be used as the operating frequency range for future EM EM transmitters, due to the emergence of new materials such as Carbon Nano-Tube (CNT) and Graphen graphene with The thickness of a carbon atom in a honeycomb crystal lattice has unique physical, electrical and optical properties. Graphene has many special properties. This material is very strong, thin, light and very flexible. In addition, it has excellent conductivity properties with electron mobility It is very high. New modulation and mechanism access mechanism for nanosystems based on asynchronous exchange of long femososcand pulses, which are transmitted over time following an on / off switching modulation.
In nano-telecommunications based on the terahertz band , logic "1" is transmitted using a long femuscon pulse, and logic "0" is transmitted silently, so the nanotechnology remains silent when transmitting logic zero. The switch-off modulation (OOK) is chosen instead of a binary pulse modulation (PAM) behavior or pulse position modulation (PPM), due to the specific behavior of the molecular absorption noise. The time between transmissions is constant and longer than the pulse time , so multiple users can share the channel without affecting each other, with very little chance of colliding between the pulses due to the size and energy limit of the nanowire, producing a powerful carrier signal. At the nanoscale at Terahertz frequencies It is not possible . As a result, classical communication paradigms based on continuous signal transmission can not be used. Therefore, very short pulses can be generated and irradiated at the nanoscale. In particular, long pulse femtoseconds, which are the main frequency components in the terahertz band.
Conclusion :
Connectivity between nano-devices leads to the idea of nano-networks, which provide the definition of nano-communications. Nano-communications expand the capabilities of nano-devices to enhance their features and expand the range of their applications.
Researcher and author: Dr. ( Afshin Rashid)
PhD in Nano-Microelectronics