Doping-induced plateau of strong electromagnetic confinement in the momentum space

Abstract

In this Letter, we present a design strategy for the realization of electrically powered bound states in the continuum (BIC) lasers. Despite growing attention of the optics community for BICs, practical uses of BICs in an active device are still unestablished. A large index contrast and out-of-plane symmetries that aid the formation of BICs are not trivial to achieve using conventional approaches for semiconductor laser design. Here, we propose a doping scheme to circumvent this issue. We also show that the introduction of material absorption due to carriers deteriorates the quality factor of BIC modes and show that a suitable compromise between electrical conductivity and optical loss can be achieved.

Polarization-selective modulation of supercavity resonances originating from bound states in the continuum

“…Due to the infinite quality (Q-) factor and zero linewidth of the BIC modes, only quasi-BICs with partial confinement and finite linewidth are observed experimentally. The partial confinement of waves has applications in lasing [13][14][15][16] , nonlinear phenomena [17][18][19][20] and highperformance sensing devices [21][22][23] .…”

Realizing symmetry-guaranteed pairs of bound states in the continuum in metasurfaces

“…Over the last decade, all-dielectric metasurfaces have emerged as a powerful platform for enhancing light-matter interactions. Unlike their metallic counterparts, all-dielectric metasurfaces can exhibit high-quality factor ( Q ) states that can be used to increase the performance of a variety of nonlinear phenomena, such as frequency conversion 1 , actively tunable optics 2 – 4 , and single-mode lasing 5 , 6 . Recently, bound states in the continuum (BICs) have emerged as the starting point for design principles to create states with arbitrarily large Q -factors across many photonic platforms.…”

Coexistence of Surface Lattice Resonances and Bound states In the Continuum in a Plasmonic Lattice

“…This disappearance leads to an infinite Q-factor and has been experimentally proven in dielectric systems [16][17][18]. Recently, several groups have theoretically proposed [19][20][21][22][23][24] and reported the BICs in lossy media [25][26][27]. Interestingly, both SLRs and BICs can be realized in periodic structures despite having opposite features in terms of the Fano resonances.…”