Extreme enhancement of optical force via the acoustic graphene plasmon mode

We have investigated the effect of enhanced optical force via the acoustic graphene plasmon (AGP) cavities with the ultra-small mode volumes. The AGP mode can generate stronger field confinement and higher momentum, which could provide giant optical force, and has no polarization preference for the optical source. We have demonstrated that the trapping potential and force applied on polystyrene nanoparticle in the AGP cavities are as high as-13.6 x 10(2) kBT/mW and 2.5 nN/mW, respectively. The effect of radius of rounded corners and gap distance of AGP cavities on the optical force has been studied. Compared with an ideal nanocube, nanocube with rounded corners is more in line with the actual situation of the device. These results show that the larger radius of nanocube rounded corners, the smaller trapping potential and force provided by AGP cavities. Our results pave a new idea for the investigation of optical field and optical force via acoustic plasmon mode.(c) 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

Automated summary

We investigated the enhanced optical force in acoustic graphene plasmon (AGP) cavities with ultra-small mode volumes. The AGP mode provides stronger field confinement and higher momentum, thus allowing for giant optical force without polarization preference. We demonstrated high trapping potential and force applied on polystyrene nanoparticles in AGP cavities, with values of -13.6 x 10(2) kBT/mW and 2.5 nN/mW, respectively. The effect of rounded corners and gap distance of AGP cavities on optical force was studied, and the results show that larger radius of rounded corners leads to smaller trapping potential and force provided by AGP cavities. Our findings open up new possibilities for studying optical field and force through acoustic plasmon mode.