تقرير
Individual nanoantennas empowered by bound states in the continuum for nonlinear photonics
| العنوان: | Individual nanoantennas empowered by bound states in the continuum for nonlinear photonics |
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| المؤلفون: | Koshelev, Kirill, Kruk, Sergey, Melik-Gaykazyan, Elizaveta, Choi, Jae-Hyuck, Bogdanov, Andrey, Park, Hong-Gyu, Kivshar, Yuri |
| سنة النشر: | 2019 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Physics - Optics, Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Applied Physics |
| الوصف: | Bound states in the continuum (BICs) represent localized modes with energies embedded in the continuous spectrum of radiating waves. BICs were discovered initially as a mathematical curiosity in quantum mechanics, and more recently were employed in photonics. Pure mathematical bound states have infinitely-large quality factors (Q factors) and zero resonant linewidth. In optics, BICs are physically limited by a finite size, material absorption, structural disorder, and surface scattering, and they manifest themselves as the resonant states with large Q factors, also known as supercavity modes or quasi-BICs. Optical BIC resonances have been demonstrated only in extended 2D and 1D systems and have been employed for distinct applications including lasing and sensing. Optical quasi-BIC modes in individual nanoresonators have been discovered recently but they were never observed in experiment. Here, we demonstrate experimentally an isolated subwavelength nanoresonator hosting a quasi-BIC resonance. We fabricate the resonator from AlGaAs material on an engineered substrate, and couple to the quasi-BIC mode using structured light. We employ the resonator as a nonlinear nanoantenna and demonstrate record-high efficiency of second-harmonic generation. Our study brings a novel platform to resonant subwavelength photonics. |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1126/science.aaz3985 |
| الوصول الحر: | http://arxiv.org/abs/1908.09790Test |
| رقم الانضمام: | edsarx.1908.09790 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1126/science.aaz3985 |
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