IEEE Photonics Technology Letters

Nonlinear Quasi-BIC With Non-Hermitian Polarization Phase Quantization in Sm 3+ :BiPO 4

Muhammad Asad Iqbal, Zeeshan Mujahid, Muhammad Qasim Khan, U. Javed, M. Usman, Faisal Munir, F. Nadeem, Fiza Latif, P. Li, Yanpeng Zhang

Published Jan 28, 2026• 0 citations

Publisher

Abstract

This study investigates quasi bound states in the continuum (qBICs) in profile and resonance signals arising from polarization phase quantization in Sm3+:BiPO4. Two types of profile qBICs (third-order non-resonance profile qBIC and fourth-order resonance profile qBIC), result from destructive and constructive quantization phase, respectively. In addition, two types of third-order resonance qBICs, namely two-dark/one-bright states (2D1B) and one-dark/two-bright states (1D2B), are observed at constructive and destructive channel phase, respectively. The third-order 2D1B states resonance qBIC together with two optical jump, comes from eigenvector amplitude splitting near the exceptional point (EP) due to quasi-constructive quantization phase. These findings suggest potential applications in the interference-based quantum memory devices.

DOI: 10.1109/lpt.2026.3658487

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