The wavefront quality of white-light supercontinuum is crucial for applications like waveform synthesis or imaging. It has been here generated by 1030 nm centered sub-picosecond pulses in YAG and characterized with a Shack-Hartmann wavefront sensor across different parts of the spectrum. It shows a good wavefront quality of λ/11 and little dependence on the wavelength of the supercontinuum. The wavefront deformations are transferred from the driver laser wavefront to the supercontinuum independently of the wavelength.
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http://dx.doi.org/10.1364/OE.26.031299 | DOI Listing |
Mater Horiz
May 2024
Department of Physics 'E.R. Caianiello', University of Salerno, Via Giovanni Paolo II 132, Fisciano 84084, Italy.
Black phosphorus (BP) field-effect transistors with ultrathin channels exhibit unipolar p-type electrical conduction over a wide range of temperatures and pressures. Herein, we study a device that exhibits mobility up to 100 cm V s and a memory window up to 1.3 μA.
View Article and Find Full Text PDFAcc Chem Res
August 2023
Colorado State University, Department of Chemistry, 200 W. Lake Street, Fort Collins, Colorado 80523, United States.
ConspectusUltrafast spectroscopy and imaging have become tools utilized by a broad range of scientists involved in materials, energy, biological, and chemical sciences. Commercialization of ultrafast spectrometers including transient absorption spectrometers, vibrational sum frequency generation spectrometers, and even multidimensional spectrometers have put these advanced spectroscopy measurements into the hands of practitioners originally outside the field of ultrafast spectroscopy. There is now a technology shift occurring in ultrafast spectroscopy, made possible by new Yb-based lasers, that is opening exciting new experiments in the chemical and physical sciences.
View Article and Find Full Text PDFNat Nanotechnol
March 2023
Engineering Product Development, Singapore University of Technology and Design, Singapore, Singapore.
The orbital angular momentum is a fundamental degree of freedom of light wavefronts, currently exploited in applications where information capacity is a key requirement, such as optical communication, super-resolution imaging and high-dimensional quantum computing. However, generating orbital angular momentum beams requires spatio-temporally coherent light sources (lasers or supercontinuum sources), because incoherent light would smear out the doughnut features of orbital angular momentum beams, forming polychromatic or obscured orbital angular momentum beams instead. Here we show generation of coloured orbital angular momentum beams using incoherent white light.
View Article and Find Full Text PDFWe report supercontinuum generation and pulse compression in two stacked multipass cells based on dielectric mirrors. The 230 fs pulses at 1 MHz containing 12 µJ are compressed by a factor of 33 down to 7 fs, corresponding to 1.0 GW peak power and overall transmission of 84%.
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