.png){kind=icon}
.png){kind=icon}
Return
High-harmonic generation from a subwavelength dielectric resonator
.png){kind=icon}
OA
AI
DOI：10.1126/sciadv.adg2655.png)
.png){kind=icon}
.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Higher-order optical harmonics entered the realm of nanostructured solids being observed recently in optical gratings and metasurfaces with a subwavelength thickness. Structuring materials at the subwavelength scale allows us toresonantly enhance the efficiency of nonlinear processes and reduce the size of high-harmonic sources. We report the observation of up to a seventh harmonic generated from a single subwavelength reso-nator made of AlGaAs material. This process is enabled by careful engineering of the resonator geometry for supporting an optical mode associated with a quasi-bound state in the continuum in the mid-infrared spectral range at around lambda = 3.7 mu m pump wavelength. The resonator volume measures similar to 0.1 lambda 3. The resonant modes are excited with an azimuthally polarized tightly focused beam. We evaluate the contributions of perturbative and nonperturbative nonlinearities to the harmonic generation process. Our work proves the possibility to minia-turize solid-state sources of high harmonics to the subwavelength volumes.
Keywords:
RADIATION
LIGHT
AI Summary
Key information extracted from the uploaded paper, including a brief overview, abstract, background, key highlights, visual analysis, and future outlook.
Journal
IF:
12.5
Papers:
2.0W
Citations:
18.1W
Organization
View more organizations