TrendForce 2025Q4 and overall 2025 revenues. Looks like SMIC is catching up to Samsung on the fab side of things.
Sub-cycle optical pulses with extremely high temporal gradients represent a forefront direction in ultrafast science. Although such pulses can provide ultrahigh temporal resolution for probing ultrafast dynamics, the ultimate half-cycle limit of pulse duration (i.e., pulse width smaller than half an optical cycle) has remained unbroken. To address this challenge, we recently proposed a scheme to generate deep-sub-cycle optical pulses via inverse Compton scattering (ICS) between a relativistic electron bunch and a deep-subwavelength confined terahertz (THz) optical field. Here, we extend this concept by replacing the THz field with a mid-infrared deep-subwavelength confined optical field, which can significantly enhance the energy of the emitted photons with similar electron-bunch incidence. For instance, when a 2-MeV, 50-as electron bunch interacts with a mid-infrared confined field with a peak wavelength of 4.4 μm and a pulse duration of 100 fs, the ICS process can generate a 0.26-cycle, 99-as extreme-ultraviolet (EUV) unipolar pulse with a peak frequency of 2.6 PHz. A trade-off between the temporal confinement and single-pulse photon number is also discussed. |