M. Bonn - Graphene in the (Terahertz) Microwave

  Рет қаралды 21,583

Département de Physique de l'ENS

Département de Physique de l'ENS

Күн бұрын

Mischa Bonn
Max Planck Institute for Polymer Research, Mainz
Graphene is an attractive candidate for many optoelectronic applications because of its vanishing bandgap and high carrier mobility. An essential process for such applications is the dissipation of the energy of photo-excited charge carriers in graphene. Two competing energy relaxation mechanisms for optically excited carriers exist: They can (i) thermalize with intrinsic carriers near the Fermi level, heating them to higher energy states through the process of ‘hot carrier multiplication’ ; or (ii) the excess energy of the optically excited carrier can be lost via emission of phonons. With ultrafast terahertz spectroscopy, an optical method for probing photoconductivities on ultrafast timescales, we quantify relaxation pathways, and show how branching ratios can be tuned. Carrier heating is also highly efficient when intrinsic carriers are accelerated by a strong electric field, which can be used to uniquely efficiently generate harmonics of terahertz radiation.

Пікірлер: 21
@gomike43
@gomike43 Жыл бұрын
Why is Graphene in the Covid jabs
@dr.rupkumarrai7713
@dr.rupkumarrai7713 Жыл бұрын
It’s about scientific discussion for THz.
@tobiaswolfelsperger
@tobiaswolfelsperger 3 ай бұрын
"When hollow structures with different cavity sizes are connected by capillaries and the capillary is subsequently broken, an interesting effect occurs in such structures. This can prevent pure hydrogen gas from diffusing while simultaneously creating vacuum effects. This technique can be used to transport water to deep layers where it would not normally go, enabling the storage of energy. It also offers the possibility of constructing automatic gas and vacuum circuits, as well as materials with super-insulating properties or catalysts that can contain hydrogen without exploding." Mann könnt es benützen um Piezoeffekte auzulösen. Und vieles Mehr. Naturlich gibt es einen Haken an der Sach die Nanostruckturen müssen auch noch in zwei ander richtungen gehen aber dabei keine grossen Strecken macht so dass keine neuen Verbindungen zu den Hohlkörpern entstehen können.
@hengzhang2214
@hengzhang2214 4 жыл бұрын
great talk!
@user-dk4pg9fo7y
@user-dk4pg9fo7y Жыл бұрын
Turn on subtitles please!
@azmattic306
@azmattic306 5 ай бұрын
did somebody say something about ufo's?
@tobiaswolfelsperger
@tobiaswolfelsperger 3 ай бұрын
Just as well, one could form salt crystals into a stable plasma through aerosol evaporation in conjunction with ultraviolet light and hydrogen bonding, if one alters, breaks, or rearranges the crystals, right? Hasn't this happened before? High-energy ions and hydrogen peroxides could be generated in a highly concentrated amount through a natural double-electrolyte vacuum chamber. (The size corresponded to limestone structures with sediment deposits in connection with strong Earth frequency fields, as found in places along a 6000 km-long freshwater stream from near the equator to a saltwater sea, such as the Mediterranean. But that's another story.)"
@chimoandcharlie
@chimoandcharlie Жыл бұрын
0:08 😅
@gfoerst
@gfoerst 2 жыл бұрын
I don't think most people could understand this I surely don't
@potatopotatopotatotomato9035
@potatopotatopotatotomato9035 Жыл бұрын
this is very basic simple stuff
@felipenamuag5386
@felipenamuag5386 2 жыл бұрын
is this related to iteracare product that sold in malaysia
@Ash-fo3gw
@Ash-fo3gw Жыл бұрын
yes, I would like to know also. Is the iteracare product, that uses terahertz frequency, harmful to a persons health if they have graphene in their body? It claims to have zero radiation and no electro-magnetic radiation. If someone could clarify that would be great as my nan is about to use one to help with pain. I'd hate to think she was harming herself... thanks in advance
@ashmac1397
@ashmac1397 Жыл бұрын
@@Ash-fo3gw did u find any other info on all that u mentioned ..would appreciate any info..
@Ash-fo3gw
@Ash-fo3gw Жыл бұрын
@@ashmac1397 No I haven't yet. I was hoping to get a response from Mischa Bonn 🤷‍♀️
@finakhan8653
@finakhan8653 Жыл бұрын
@@Ash-fo3gw Iteracare care blower is safe even on babies and dogs. this talk has nothing to do with iteracare. Terahertz is a frequency that’s non ionizing and safe. There is no graphing in Iteracare device.
@Amanda-ln7yb
@Amanda-ln7yb Жыл бұрын
@@Ash-fo3gw I know 4 people who were injured by the vax and now are having amazing resilts after using i tera care device! They have their health and their lives back
@shyamsharma866
@shyamsharma866 2 жыл бұрын
Please send me hindi lagnuge
@light_werks
@light_werks Жыл бұрын
Seems like terahertz waves are similar to that of pranic energy in the Vedic tradition. I am w9ndering if the Covid vaccine utilized Graphene to deliver MRNA and also has become a resistor to our natural pranic body. What are your thoughts? I am just assuming you would have thought due to your cultural background. I am in love with Vedic
@philippesenechal101
@philippesenechal101 Жыл бұрын
Gbit/THz=
@tonyb8660
@tonyb8660 4 ай бұрын
this was a lousy talk
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