HEIDI: Joseph, Shereena: Exploring the Optical Bound State in the Continuum in a Dielectric Grating Coupled Plasmonic Hybrid System

Verfasst von:	Joseph, Shereena
	Sarkar, Swagato
	Khan, Sunny
	Joseph, Joby
Titel:	Exploring the Optical Bound State in the Continuum in a Dielectric Grating Coupled Plasmonic Hybrid System
Verlagsort:	Weinheim
Verlag:	Wiley Subscription Services, Inc
Jahr:	2021
Umfang:	12 S.
Inhalt:	The bound state in the continuum (BIC) explores the extraordinary optical properties of a system possessing wave characteristics that gained recent importance for practical applications, including lasing, sensing, optical tweezing, nonlinear interactions, and many more. Unlike a pure optical or plasmonic system, a hybrid architecture with coupled photonic–plasmonic characteristics can offer the intermittent resonant modes for suitable applications. Therefore, BIC modes are investigated here in such a photonic–plasmonic hybrid structure made up of a dielectric sinusoidal grating deposited on a flat metal layer via low‐cost fabrication methods. Such a design has not been subjected to the investigation of BIC formation so far. The structure‐supported resonant modes are numerically studied by analyzing the reflection characteristics in the parametric space. The Friedrich–Wintgen bound state (FW‐BIC) is produced by the interference of distinct resonance channels, further resulting in a quasi‐BIC hybrid mode revealed in the parametric sweep. An additional angular scan demonstrates the intrinsic symmetry‐protected BIC (SP‐BIC), and its hybridization with a plasmonic mode results in a distinct FW‐BIC mode and a quasi‐BIC hybrid mode. The experimentally obtained spectral characteristics in the angular resolved scan between 5 to 20 degrees verify the quasi‐BIC hybrid modes with good quality factors and enhanced field confinement. Dielectric grating coupled hybrid plasmonic system is investigated for bound state in the continuum (BIC) modes. BICs originated by the resonance synergies between a photonic grating and a plasmonic thin film are explored to full depths. Identified BICs in both theoretical and experimental observations can be useful in attaining high quality factors for nanophotonic device applications.
ISSN:	2195-1071
Titel Quelle:	Advanced optical materials
Jahr Quelle:	2021
Band/Heft Quelle:	9, 8
DOI:	doi:10.1002/adom.202001895
URL:	http://www.ub.uni-heidelberg.de/cgi-bin/edok?dok=https%3A%2F%2Ffanyv88.com%3A443%2Fhttps%2Fonlinelibrary.wiley.com%2Fdoi%2Fabs%2F10.1002%2Fadom.2020 ...
	http://www.ub.uni-heidelberg.de/cgi-bin/edok?dok=https%3A%2F%2Ffanyv88.com%3A443%2Fhttps%2Fwww.proquest.com%2Fdocview%2F2514957961%2Fabstract%2F
	DOI: https://doi.org/10.1002/adom.202001895
Sprache:	English
Sach-SW:	bound states in the continuum
	Fabry–Perot cavity
	grating coupled plasmonic modes
	guided‐mode resonance
	Hybrid modes
	hybrid plasmonic–photonic modes
	Hybrid structures
	Hybrid systems
	Materials science
	Optical properties
	Optics
	Photonics
	Plasmonics
	Q factors
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