mfb said:Send visible light on a ~500nm-antenna, and you have electric alternating current of 6*1014 Hz. Use ultraviolet light and a 10nm-antenna, and you get 3*1016 Hz. The limit is just the material - a wavelength as short as the distance between atoms does not make sense as "electrical signal".
mfb said:The limit for computing is not the generated frequency, the issue is to work with it. You can produce signals with 600THz, but the logic gates are not quick enough to handle this, and signal delays are another problem.
Yes, and the reason is simply that a higher frequency would not be useful.y33t said:We can generate signals with microcontrollers, FPGA's, external DAC's and etc at any frequency depending on the boundaries of that IC. For example a PIC mcu can generate a 20KHz signal but it can't generate MHz or above. A midclass FPGA can generate a few MHz or GHz but not above.
I do now know why you dislike the optical approach. However, 3 NOT gates in a row can give an oscillating signal, and transistors are close to 1 THz.What I was trying to ask is that what is the limit that can be generated electrically . At this point I think we come up with your expression above, changing signal amplitude over time is the generating part and this is determined by the response time of the switching gates.
See the fastest transistor link.Can you point me to a paper or writing for this particular problem you mentioned above (lack of speed originating from logic gates) ?
You have an electric potential oscillating at this frequency. How to use this is a completely different question.On the other hand, I haven't come across any article or study that they could generated 600THz electrical signal by exposing a monochromatic light source to the wavelength-equivalent antenna. Is it really that easy, hold some laser to a very tiny antenna and you have your 600THz clock ?
mfb said:Rotation of a macroscopic object? 1MHz, with graphene.
The highest frequency mankind has ever generated refers to the strongest and most powerful electromagnetic waves that have been intentionally produced by humans. These waves can range from radio waves with frequencies in the kilohertz range to gamma rays with frequencies in the petahertz range.
High frequencies are generated through the use of specialized equipment and technology like radio transmitters, lasers, and particle accelerators. These devices are able to produce high energy particles that vibrate at extremely high frequencies, creating electromagnetic waves.
High frequencies are used in various fields of science and technology, including telecommunications, medical imaging, and research. They allow us to transmit and receive information, study the properties of matter, and explore the universe in ways that were not possible before.
While high frequencies have many beneficial uses, they can also have harmful effects on living organisms. Exposure to high frequency radiation, such as ultraviolet and x-rays, can damage cells and cause health problems like sunburn and cancer. It is important to use caution and protective measures when working with high frequencies.
The highest frequency mankind has generated is constantly changing and evolving as technology advances. Currently, the highest frequency recorded is in the petahertz range, produced by the Linac Coherent Light Source at the SLAC National Accelerator Laboratory in California. However, it is likely that even higher frequencies will be achieved in the future as we continue to push the boundaries of science and technology.