This elegant invention, which was honoured by the 2005 Nobel Prize in Physics4'5, provides a direct link between radio and optical frequencies, allowing one to count cycles of an electromagnetic field at near-petahertz frequencies (1 petahertz is 1015 Hz). On page 68 of this issue, Cingoz...
R. et al. Optical frequency comb with submillihertz linewidth and more than 10 W average power. Nat. Photon. 2, 355–359 (2008). ADS Google Scholar Li, X. et al. High-power ultrafast Yb:fiber laser frequency combs using commercially available components and basic fiber tools. Rev. ...
spectroscopy signals for both an argon transition at 82 nanometres and a neon transition at 63 nanometres, thus confirming the combs’ coherence in the extreme ultraviolet. The absolute frequency of the argon transition has been determined by direct frequency comb spectroscopy. The resolved ten-...
The above excilamps excited in the continuous mode (cw) or a repetitive pulsed mode with a pulse repetition rate ranging from tens of hertz to hundreds of kilohertz, as a rule, have radiation powers up to ∼100 mW/cm2 and rather low pulsed powers—no greater than tens of watts per sq...
What is the wavelength, in nm, of a photon with energy 0.30 eV? Is this wavelength visible, ultraviolet, or infrared light? What is the wavelength of light of frequency 100 Hz? Calculate the frequency in hertz and cm-1, as well as the ...
Structured illumination is used for both the IR and the EUV illumination to enrich the spatial-frequency spectrum in the illumination, thus enhancing the signal-to-noise ratio (SNR) and spatial resolution of ptychographic reconstructions [42]. For this purpose, two amplitude masks with diameters ...
multi-petahertzfrequency,inducedinthelowestconductionband ofSiO 2 .Todemonstratetheapplicabilityofhigh-harmonicspec- troscopytosolids,weexploittheEUVspectratogainaccesstofine detailsoftheenergydispersionprofileoftheconductionbandthat areasyetinaccessiblebyphotoemissionspectroscopyinwide- ...
Widely tunable and narrow-linewidth lasers at visible wavelengths are necessary for applications such as quantum optics, optical clocks and atomic and molecular physics. At present, the lasers are benchtop systems, which precludes these technologies from
A one inch bullet traveling at 5,000 feet per second (60,000 inches per second) would pass an edge in 16.7 microseconds. From the relationship F=0.35/T where T is the rise time and F is the bandwidth, a bandwidth of about 20,000 Hertz is obtained. While the photomultiplier can ...
The Tg of the laminate was determined using dynamic mechanical analysis and the Tg identified as the peak of the tan delta at a frequency of 1 hertz, ASTM E1640. The cured compositions of this invention may be characterized as having an elastic modulus generally greater than 2,000 psi, ...