InGaN/GaN Nanorod Arrays for a Hybrid Nanolaser

Abstract

Lasers with small size have demonstrated great potential in numerous applications including communication, optical computing, detection, displays, and optical logic circuits. In this study, hybrid plasmonic nanolasers with metal pad structures based on the InGaN/GaN nanorod are designed and fabricated to investigate the lasing modes and polarization modulation. Dominant coupling of the surface plasmon mode has been achieved by optimizing the hybrid nanolaser structures, which significantly enhances the electric field concentration, leading to an ultralow threshold (∼1.19 W cm −2 ) plasmonic multimode lasing. Based on the theoretical and experimental results, it is proposed that the suitable plasmonic structural parameters could provide wave-vector matching and phase compensation to form a strong plasmon resonator, yielding a low radiative loss and high gain for the laser. These InGaN/GaN nanorod arrays for the hybrid nanolaser not only provide a solution to the ultralow-threshold nanorod-based plasmonic lasers but also advocate the prospect of the greater potential of nanoscale arrays for luminescence and displays. These findings and understandings provide vital insights into the developments of electrically driven plasmonic nanolasers and may contribute to the realization of nanolaser-based display arrays and optical on-chip integration for the next generation of logic circuits.

Threshold Reducing via Micro Rhombic Lasing Misalignment Step‐Cavity with a Simple and Universal Use

“…The threshold comparison in different cavity with same materials of Refs. [9] and [11] can be seen in Tables S2 and S3 (Supporting Information).…”

“…For proving, materials from the Refs. [9] and [11] were used in the cavity for threshold comparing. The results can be seen in Figure S16 (Supporting Information).…”

“…Synthesis of Stable CsPbBr 3 QDs: The thermal injection method was used to prepare CsPbBr 3 QDs, which is the same as our previous work, [11] also can be seen in Figure S1 (Supporting Information). However, their use as laser gain media is hampered by the fact that the fully inorganic chalcogenide quantum dots are generally not stable enough in air and are highly susceptible to decomposition.…”

“…In this research, the sodium-base plasmonic is key factors in threshold reduction. Liu et al [11] reported a hybrid plasmonic nanolasers with metal pad structures based on the InGaN/GaN nanorod with ultralow threshold 1.19 W cm −2 . Dominant coupling of the surface plasmon mode has been achieved by optimizing the hybrid nanolaser structures, which significantly enhances the electric field concentration, leading to ultra-low threshold multimode plasmonic lasing.…”

Recent Developments of Electrically Pumped Nanolasers

“…[76] In addition to the CdS and ZnO materials mentioned above, the III-V semiconductor materials with excellent properties such as large exciton binding energy, large oscillator strength, and low surface state densities can also be used to realize high-performance nanolasers. [77][78][79][80][81][82] For example, by utilizing the individual In-GaN/GaN lateral nanowires with PMMA-air dielectric gratings, Banerjee et al obtained the electrically pumped single nanolaser with an ultra-low threshold current of only 8.9 nA. [83]…”