[10p-N404-1~14] 4.1 Plasmonics and Nanophotonics

▲ [10p-N404-4] Plasmonic Nanolaser by Silver Nanowire Embedded in CsPbBr3 Quantum Dots

〇(D)Xing Di¹、Cheng-Chieh Lin²、Phillip Won³、Rong Xiang¹、Tzu-Pei Chen²、A. Syazwan A. Kamal¹、Yang-Chun Lee¹、Ya-Lun Ho¹、Shigeo Maruyama¹、Seung Hwan Ko³、Chun-Wei Chen¹、Jean-Jacques Delaunay¹ (1.The Univ. of Tokyo、2.National Taiwan Univ.、3.Seoul National Univ.)

キーワード：perovskite, plasmonic laser

Plasmonic nanolasers provide a valuable opportunity for expanding sub-wavelength applications in the fields of biosensing, nonlinear frequency generation, and optical switching. Due to the potential of on-chip integration, plasmonic nanolasers that support waveguide mode have attracted lots of interest. However, the performances of these nanolasers are mostly determined by the geometries of semiconductor gain media which are quite difficult to manipulate. Metallic nanowires (NW) can be easily manipulated to construct complex optical devices, which makes them ideal for on-chip devices. To date, a single metallic NW-based plasmonic nanolaser that supports waveguide mode laser has not been reported yet. Here, we demonstrate a single Ag NW-based plasmonic nanolasers by fully embedding the Ag NW in the CsPbBr perovskite quantum dots (QDs) film. By embedding Ag NWs in QDs film, an evolution from amplified spontaneous emission with an FWHM of 6.6 nm to localized surface plasmon resonance (LSPR) supported random lasing is observed. When the pump light is focused on a single Ag NW, a QD-NW coupled plasmonic-waveguide laser with a much narrower emission peak (FWHM = 0.4 nm) is realized on a single Ag NW with the uniform PVP layer.