Controlling the polarization and phase of high-order harmonics with a plasmonic metasurface

• DOI: 10.1364/optica.464445
• Publication Date: 2022-08-08T13:30:09Z
• Authors: Sohail A. Jalil; Kashif M. Awan; Idriss A. Ali; Sabaa Rashid; Joshua Baxter; Aleksey Korobenko; Guilmot Ernotte; Andrei Naumov; David M. Villeneuve; André Staudte; Pierre Berini; Lora Ramunno; Giulio Vampa
• Keywords: 0103 physical sciences; 01 natural sciences

Nanostructured surfaces, or metasurfaces, allow exquisite control of linear and nonlinear optical processes by reshaping the amplitude, phase, polarization electric magnetic fields near wavelength-scale heterogeneities. Recently, metasurfaces have broken new ground in high-field attosecond science where they been utilized to amplify emission high-order harmonics femtosecond infrared laser pulses, a notoriously inefficient process, enhancing incident field, shape emitted high space. Here we show phase with plasmonic metasurface. We design fabricate perpendicularly aligned rectangular gold antennas on silicon crystal that generate circularly polarized deep-ultraviolet harmonics, from driver, providing simple path for achieving circular patterned crystals. Our metasurface enhances up <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mo>∼</mml:mo> </mml:mrow> <mml:mn>43</mml:mn> </mml:math> times when compared unpatterned surface, are quenched. Looking forward, will be useful tools sensing chiral laser–matter interactions materials. approach paves way at even shorter, extreme ultraviolet, wavelengths.