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- Title
Gain enhancement of perovskite nanosheets by a patterned waveguide: excitation and temperature dependence of gain saturation.
- Authors
Kim, Inhong; Choi, Ga Eul; Mei, Ming; Kim, Min Woo; Kim, Minju; Kwon, Young Woo; Jeong, Tae-In; Kim, Seungchul; Hong, Suck Won; Kyhm, Kwangseuk; Taylor, Robert A.
- Abstract
Optical gain enhancement of two-dimensional CsPbBr3 nanosheets was studied when the amplified spontaneous emission is guided by a patterned structure of polyurethane-acrylate. Given the uncertainties and pitfalls in retrieving a gain coefficient from the variable stripe length method, a gain contour g (ℏ ω , x) was obtained in the plane of spectrum energy (ℏω) and stripe length (x), whereby an average gain was obtained, and gain saturation was analysed. Excitation and temperature dependence of the gain contour show that the waveguide enhances both gain and thermal stability due to the increased optical confinement and heat dissipation, and the gain origins were attributed to the two-dimensional excitons and the localized states.Optical gain of perovskite nanosheets becomes increased when a micro-patterned structure is utilized, where gain saturation is analyzed in the plane of spectrum energy and stripe length.
- Publication
Light: Science & Applications, 2023, Vol 12, Issue 1, p1
- ISSN
2047-7538
- Publication type
Article
- DOI
10.1038/s41377-023-01313-0