Single-mode lasing by tailoring the excitation of localized surface plasmon resonances to whispering gallery modes in a microring laser

Abstract

Cavity mode manipulation in lasers is urgent for the stable single-mode operation of a microring laser. Here, we propose and experimentally demonstrate the plasmonic whispering gallery mode microring laser for strong coupling between local plasmonic resonances and whispering gallery modes (WGM) on the microring cavity to achieve pure single-mode lasing. The proposed structure is fabricated based on integrated photonics circuits consisting of gold nanoparticles deposited on a single microring. Additionally, our numerical simulation provides deep insight into the interaction between the gold nanoparticles and WGM modes. The manufacture of microlasers for the advancement of lab-on-a-chip devices and all-optical detection of ultra-low analysts may benefit from our findings.

Efficient Multilayer Near-Infrared Microbottle Laser Pumped by a 532 nm Nanosecond Laser

“…The doped glass's thickness at the Equator measures 80 μm, while its diameter measures 50 μm [13]. The fiber tapering setup comprises the CO₂ laser, two stages to get stuck in the fiber, and a galvanometer-driven scanning mirror to scatter the laser beam along a 7 cm fiber length [6]. By reducing the targeted spot size, smaller diameters can be achieved, and the width of the laser sweep during the taper manufacturing process can be varied, allowing control over the taper transition's shaping.…”

“…They combine the features of solid and liquid resonators [4]. Glass WGM micro-cavities, including microspheres, microtoroids, microdisks, microbottles, and microbubbles, have been recognized as crucial micro-cavities due to their simple fabrication, ultra-low optical loss, broadband transparency, and full compatibility with complementary metal-oxide-semiconductor (CMOS) technology [5] [6].…”