Design of an ultrafast plasmonic nanolaser for high-intensity broadband emission operating at room temperature

• peng zhou, Lei Jin, Kun Liang, Xiongyu Liang, Li Junqiang, Xuyan Deng, Wang yilin, Guo Jiaqi, Li Yu, and Jiasen Zhang
• received 01/09/2024; accepted 04/12/2024; posted 04/12/2024; Doc. ID 518240
• Abstract: We propose a plasmonic nanolaser based on Metal-Insulator-Semiconductor-Insulator-Metal (MISIM) structure, which effectively confines light on a subwavelength scale (~λ/14). As the pump power increases, the proposed plasmonic nanolaser exhibits broadband output characteristics of 20nm and the maximum output power can reach 20uW. Furthermore, the carrier lifetime at the upper energy level in our proposed structure is measured to be about 400 fs using a double pump-probe excitation. The ultrafast characteristic is attributed to the inherent Purcell effect of plasmon systems. Our work paves the way toward deep-subwavelength mode confinement and ultrafast femtoseconds plasmonic laser in Spaser-based interconnects，eigenmode engineering of plasmonic nanolasers, Nano-LEDs, spontaneous emission control.