High-Q Resonant Modes in Periodic Stubbed Structure - Archive ouverte HAL
Communication Dans Un Congrès Année : 2023

High-Q Resonant Modes in Periodic Stubbed Structure

Résumé

Bound states in the continuum (BICs) have unique properties and significant applications in photonics. In this paper, we show analytically and experimentally the existence of (N−1) BICs (multi-BICs) in the flat band of a periodic photonic comb made of N stubs of length d2 separated by segments of length d1. These BICs occur when d1 and d2 are taken commensurate at a given frequency, which turn to quasi-BICs (multi-Fano resonances) when d1and d2 are taken slightly different from the BIC position. The signature of BICs and quasi-BICs can be observed in the transmission and density of states (DOS) spectra. We show that BICs are characterized by an infinite Q factor resonances, while quasi-BICs give rise to high-Q factor resonances that grow cubically with N. Our study improves the theoretical comprehension of BICs in stubbed structure and provides useful guidelines for future applications.
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Dates et versions

hal-04107565 , version 1 (26-05-2023)

Identifiants

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Yamina Rezzouk, Mohamed El Ghafiani, Soufyane Khattou, Madiha Amrani, El Houssaine El Boudouti, et al.. High-Q Resonant Modes in Periodic Stubbed Structure. ICEERE 2022, May 2022, Saidia, Morocco. pp.223-230, ⟨10.1007/978-981-19-6223-3_25⟩. ⟨hal-04107565⟩
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