20.500.12556/RUL-167752 Quasi-continuous single-mode tuning of a circularly polarized microcavity laser via the reflection phase Tunable lasers have garnered significant attention due to their pivotal roles in various fields, such as biomedical imaging, quantum optics, and spectroscopy. Laser tuning has been demonstrated either discretely based on mode-hopping or continuously on the resonator length and refractive index. By taking cholesteric liquid crystals (CLCs) as an example, we demonstrate quasi-continuous wavelength tuning of a circularly polarized microcavity laser, which is a sandwiched structure comprising two CLC layers and an isotropic polymer layer. Its lasing threshold is 1.02 μJ, and full-width at half maximum is 0.15 nm. The tuning range of the emission wavelength is about 7.8 nm for a temperature change of 12 ℃, with a tuning step less than 1.5 nm. The tuning mechanism is clarified by considering the reflection phase properties of the CLC, and the numerical results from the proposed structure comply well with those obtained using the Berreman 4 × 4 matrix method. Our work provides a novel approach for designing tunable microcavity mode lasers, which have promising applications in radar technology, sensing, display technology, and other photonics fields. optics lasers optika laserji true false true Angleški jezik Slovenski jezik Članek v reviji 2025-03-10 13:48:58 2025-03-10 13:48:59 2025-03-11 04:03:05 0000-00-00 00:00:00 2025 0 0 Str. 12176-12184 iss. 5 Vol. 33 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 535 1094-4087 10.1364/OE.555026 228470275 DonghaoYang-oe-33-5-12176-2025.pdf DonghaoYang-oe-33-5-12176-2025.pdf 1 1FBDECD101849FFACB92BA6504E45016 1fc75b9d41f718cceef7c9aac856041d53c41849e82015fad219da5c20d3a1f8 c0a664c1-fdad-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=200498 https://opg.optica.org/oe/fulltext.cfm?uri=oe-33-5-12176&id=568965 0 c9dba3ef-fdad-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=200499 Fakulteta za matematiko in fiziko 0 0 0