Optical Bound States in the Continuum in Subwavelength Gratings Made of an Epitaxial van der Waals Material
Emilia Pruszyńska-Karbownik, Tomasz Fąs, Katarzyna Brańko, Dmitriy Yavorskiy, Bartłomiej Stonio, Rafał Bożek, Piotr Karbownik, Jerzy Wróbel, Tomasz Czyszanowski, Tomasz Stefaniuk, Wojciech Pacuski, Jan Suffczyński
TL;DR
Researchers created a new photonic structure using MoSe2 that supports unique optical modes and boosts harmonic generation efficiency.
Contribution
The study demonstrates the first epitaxial MoSe2 subwavelength grating supporting optical bound states in the continuum.
Findings
MoSe2 subwavelength gratings host bound states in the continuum confirmed by reflectivity measurements.
Third-harmonic generation efficiency is enhanced by over 1,000 times compared to unstructured MoSe2.
The structures are promising for compact photonic devices like lasers and wavefront controllers.
Abstract
High refractive index (4.4 at 1100 nm), negligibly small absorption in the near-infrared spectral range, and ease of processing make MoSe2 the perfect material for applications in near-infrared photonics. So far, implementation of MoSe2-based photonic structures has been hindered by the lack of large-surface MoSe2 substrates. The use of molecular beam epitaxy allows the production of homogeneous layers of MoSe2 with a few-inch surface and a thickness controlled at the sub-nm level. In the present work, we design by theoretical calculations and fabricate by a simple lithography process an ultrathin subwavelength grating out of a 42 nm thick, epitaxially grown MoSe2 layer. Our polarization-resolved reflectivity measurements confirm that the gratings host a peculiar type of a confined optical mode that is a bound state in the continuum. Moreover, the fabricated structures enhance the…
Genes, proteins, chemicals, diseases, species, mutations and cell lines named across the full text — each resolved to its canonical identifier and authoritative record.
Click any figure to enlarge with its caption.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
Figure 19
Figure 20
Figure 21
Figure 22
Figure 23
Figure 24Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsPhotonic and Optical Devices · Advanced Fiber Optic Sensors · Plasmonic and Surface Plasmon Research