
1.Department of Opto & Cogno Mechatronics Engineering, RCDAMP, Pusan National University, Busan 46241, Republic of Korea
2.Department of Nano-Fusion Technology, Pusan National University, Busan 46241, Republic of Korea
3.Clarendon Laboratory, Department of Physics, University of Oxford, Oxford OX1 3PU, UK
Suck Won Hong (swhong@pusan.ac.kr)
Kwangseuk Kyhm (kskyhm@pusan.ac.kr)
Robert A. Taylor (robert.taylor@physics.ox.ac.uk)
Published:31 December 2023,
Published Online:24 November 2023,
Received:27 June 2023,
Revised:20 October 2023,
Accepted:22 October 2023
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Kim, I. et al. Gain enhancement of perovskite nanosheets by a patterned waveguide: excitation and temperature dependence of gain saturation. Light: Science & Applications, 12, 2688-2699 (2023).
Kim, I. et al. Gain enhancement of perovskite nanosheets by a patterned waveguide: excitation and temperature dependence of gain saturation. Light: Science & Applications, 12, 2688-2699 (2023). DOI: 10.1038/s41377-023-01313-0.
Optical gain enhancement of two-dimensional CsPbBr
3
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
$$ g(\hslash \omega
x) $$
was obtained in the plane of spectrum energy (ℏ
ω
) 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.
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