Large-Area Perovskite Nanocrystal Metasurfaces for Direction-Tunable Lasing
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
---|---|
Pages (from-to) | 12676–12683 |
Journal / Publication | Nano Letters |
Volume | 24 |
Issue number | 40 |
Online published | 25 Sept 2024 |
Publication status | Published - 9 Oct 2024 |
Link(s)
Abstract
Perovskite nanocrystals (PNCs) are attractive emissive materials for developing compact lasers. However, manipulation of PNC laser directionality has been difficult, which limits their usage in photonic devices that require on-demand tunability. Here we demonstrate PNC metasurface lasers with engineered emission angles. We fabricated millimeter-scale CsPbBr3 PNC metasurfaces using an all-solution-processing technique based on soft nanoimprinting lithography. By designing band-edge photonic modes at the high-symmetry X point of the reciprocal lattice, we achieved four linearly polarized lasing beams along a polar angle of ∼30° under optical pumping. The device architecture further allows tuning of the lasing emission angles to 0° and ∼50°, respectively, by adjusting the PNC thickness to shift other high-symmetry points (Γ and M) to the PNC emission wavelength range. Our laser design strategies offer prospects for applications in directional optical antennas and detectors, 3D laser projection displays, and multichannel visible light communication. © 2024 American Chemical Society.
Research Area(s)
- laser directionality, metasurface, nanoimprinting, perovskite nanocrystals, photonic band structure
Citation Format(s)
Large-Area Perovskite Nanocrystal Metasurfaces for Direction-Tunable Lasing. / Mou, Nanli; Tang, Bing; Han, Bowen et al.
In: Nano Letters, Vol. 24, No. 40, 09.10.2024, p. 12676–12683.
In: Nano Letters, Vol. 24, No. 40, 09.10.2024, p. 12676–12683.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review