(of radio waves) having a wavelength significantly shorter than that of the usual short waves, in particular shorter than 10 metres (i.e. of a VHF frequency above 30 MHz).
（无线电波）超短的
Example sentencesExamples
Now physicists in Vienna and Germany have managed to do just that, allowing the carrier-envelope phase of a high-power ultrashort pulsed laser to be altered at will.
If you use an ultrashort pulse of laser light instead of white light, the pulse will also break up, shedding smaller bits called precursors as it goes.
Although the ultrashort solitons described above have so far only been generated using a GaAs: InGaAs laser, nothing inherent to the technique restricts it to a specific material system.
In their experiments conducted at the Max Born Institute in Berlin, Ropers and colleagues aim an ultrashort laser pulse at a nanostructured metal surface.
According to the uncertainty principle, these ultrashort pulses would have a very wide spectrum of energies - with some photons in the gamma radiation range, having more than 1 MeV of energy.
Physicists have used ultrashort pulses of light to control the motion of electrons ejected from molecules and to produce electron beams just a few nanometres in length.
Definition of ultrashort in US English:
ultrashort
adjectiveˌəltrəˈʃɔrtˌəltrəˈSHôrt
(of radio waves) having a wavelength significantly shorter than that of the usual shortwaves, in particular shorter than 10 meters (i.e., of a VHF frequency above 30 MHz).
（无线电波）超短的
Example sentencesExamples
If you use an ultrashort pulse of laser light instead of white light, the pulse will also break up, shedding smaller bits called precursors as it goes.
Physicists have used ultrashort pulses of light to control the motion of electrons ejected from molecules and to produce electron beams just a few nanometres in length.
Although the ultrashort solitons described above have so far only been generated using a GaAs: InGaAs laser, nothing inherent to the technique restricts it to a specific material system.
In their experiments conducted at the Max Born Institute in Berlin, Ropers and colleagues aim an ultrashort laser pulse at a nanostructured metal surface.
Now physicists in Vienna and Germany have managed to do just that, allowing the carrier-envelope phase of a high-power ultrashort pulsed laser to be altered at will.
According to the uncertainty principle, these ultrashort pulses would have a very wide spectrum of energies - with some photons in the gamma radiation range, having more than 1 MeV of energy.