ELFT HÍRADÓ

[ortvay AT achilles.elte.hu (Ortvay kollokvium)]

ELTE Fizika Intezet


                             ORTVAY KOLLOKVIUM

                     2009. majus 14. , csutortok, 15 orakor
  Az ELTE Pazmany Peter s. 1/A alatti epuleteben a foldszinti 0.83 eloadoban

                                   Baowen Li 
                      (National University of Singapore): 
  "Phononics: processing information with phonons and controlling heat flow" 

Kivonatos ismertetes:

Information processing in the world's computers is mostly carried out in 
compact electronic devices, which use the flow of electrons both to carry and 
control information. There are, however, other potential information 
carriers, 
such as photons, which are parcels of light. Indeed a major industry, 
photonics, has developed around the sending of messages encoded in pulsed 
light. 

In this talk I will demonstrate via different theoretical models of thermal 
devices such as thermal diode and thermal transistor that, heat pulses, or 
phonons, rippling through a crystal might also become a major carrier. By 
combining thermal transistor in different ways, one can also build up thermal 
logic gate, thus open the possibility that, heat energy already present in 
abundance in electronic devices, can be controlled, manipulated and even used 
to process information and even to do computation. Moreover, I will also 
demonstrate that the phononic information can be read and store in the 
phononic 
memory. 

Experiments in nanostructures will be also discussed 

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