Compact and robust supercontinuum generation and post-compression using multiple thin plates

Abstract

We report on compact and robust supercontinuum generation and post-compression using transmission of light through multiple thin solid plates at the SwissFEL x-ray free-electron laser facility. A single stage consisting of three thin plates followed by a chirped mirror compressor achieves compression of initially 30 fs pulses with 800 nm center wavelength to sub-10 fs duration. We also demonstrate a two-stage implementation to compress the pulses further to sub-5 fs duration. With the two-stage setup, the generated supercontinuum includes wavelengths ranging from 500 nm to 1100 nm. The multi-plate setup is compact, robust, and stable which makes it ideal for applications at free-electron laser facilities such as pump-probe experiments and laser-arrival timing tools.

Flexible Control of Phase and Polarization based on All‐Dielectric Metamaterials

“…[37][38][39][40][41][42][43] Geometric phase metasurfaces use the phase difference generated by the different geometric paths of the electromagnetic wave in the process of polarization state transformation to control the light wave transmission phase. [45][46][47][48][49][50][51][52][53][54][55][56] Currently, most metasurface devices are based on single-phase modulation. We use the superposition of the transmission phase and geometric phase to control the polarization state and focusing properties of the electromagnetic wavefront.…”

Transmitted Electromagnetic Beam Steering of Pyramid All‐Dielectric Encoding Surface Microstructure

“…In recent years, the research and application of metasurfaces are more extensive, and the development prospects are also broader. [ 25–44 ] Metasurfaces can be well used in beam separation, abnormal beam deflection, polarization conversion, stealth devices, holography and other fields. [ 45–60 ]…”

“…In recent years, the research and application of metasurfaces are more extensive, and the development prospects are also broader. [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44] Metasurfaces can be well used in beam separation, abnormal beam deflection, polarization conversion, stealth devices, holography and other fields. [45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60] Recently, Cui first proposed the concept of digitally encoded metasurfaces.…”

Far-field scattering control of wave based on all-dielectric blazed encoding metagrating

“…They are designed by combining conventional materials existing in nature to realize special physical phenomena that cannot be achieved in natural materials [9][10][11][12][13][14][15]. Metasurfaces are similar to metamaterials, which are also two-dimensional planar arrays composed of subwavelength metamaterial structural units [16][17][18][19][20][21][22][23][24][25]. Metasurfaces can be considered as an extension and expansion of metamaterial research [26][27][28][29][30].…”