MENGGESER TITIK FOKUS LENSA PLASMONIK SPIRAL DENGAN MENGUBAH PANJANG GELOMBANG CAHAYA DATANG

Fitri Oktafiani

Abstract


Plasmonic structures are metal-based structures characterized by plasmon oscillations in the electron conduction band in response to external radiation. This structure has strong light absorption and light scattering as well as electromagnetic field amplification at short distances (near-field). Based on these advantages, improving the focusing performance of surface plasmonic polariton waves is urgently needed. The sharp focus with strong intensity has been used for various applications, including nanoimaging, nanolithography, and optical tweezers. In this research, we use a spiral plasmonic lens combined with a groove ring and the incident beam has a circular polarization direction (circular polarization). The spiral plasmonic lens functions to generate plasmonic waves, while the groove ring functions to spread plasmonic waves on the surface to the focal point with a certain curve in the z-axis direction (far-field). Parameter optimization is carried out by varying the position of the ring groove. Two waves are used to shift the focus point, namely 1064 nm and 1280 nm. The focal point experiences a range of +500 nm on the z-axis when the waveform is changed. However, the intensity of the focal point at the 1280 nm wave is lower than at the 1064 nm wave. This is in accordance with the theory that when the focal point is further away from the surface structure, the intensity decreases. Shifting the focal point by changing waves can be used in several applications, one example is for manipulating microparticles in two different places.


Keywords


Spiral plasmonic lens, far-field focal point, circular polarization, nanostructure

Full Text:

PDF

References


Bozhevolnyi, S. I., Volkov, V. S., Devaux, E., Laluet, J.-Y., & Ebbesen, T. W. (2006). Channel plasmon subwavelength waveguide components including interferometers and ring resonators. Nature 440, 508-511.

Chen, J., Sun, C., Rong, K., Li, H., & Gong, Q. (2015). Polarization-free directional coupling of surface plasmon polaritons. Laser Photonics Rev 9, 419-426.

Chen, W., Abeysinghe, D. C., Nelson, L., & Zhan, Q. (2010). Experimental confirmation of miniature spiral plasmonic lens as a circular polarization analyzer. Nano Lett. 10, 2075-2079.

Ditlbacher, H., Krenn, J. R., Lamprecht, B., Leitner, A., & Aussenegg, F. R. (2000). Spectrally coded optical data storage by metal nanoparticles. Opt. Lett. 25, 563-565.

Fu, Y., & Zhou, X. (2010a). Plasmonic lenses: A review. Plasmonics 5, 287.

Fu, Y., Liu, Y., Zhou, X., Xu, Z., & Fang, F. (2010b). Experimental investigation of superfocusing of plasmonic lens with chirped circular nanoslits. Opt. Express 18, 3438-3443.

Krasavin, A. V., Schwanecke, A. S., Zheludev, N. I., Reichelt, M., Stroucken, T., Koch, S. W., & Wright, E. M. (2005). Polarization conversion and “focusing” of light propagating through a small chiral through a small chiral hole in a metallic screen. Appl. Phys. Lett. 86, 201105.

Krasavin, A. V., Schwanecke, A. S., & Zheludev, N. I. (2006). Extraordinary properties of light transmission through a small chiral hole in a metallic screen. J. Opt. A: Pure Appl. Opt. 8, S98-S105.

Miao, J., Wang, Y., Guo, C., Tian, Y., Zhang, J., Liu, Q., Zhou, Z., & Misawa, H. (2012). Far-field focusing of spiral plasmonic lens. Plasmonics 7(2), 377–381.

Miao, J., Wang, Y., Guo, C., Tian, Y., Guo, S., Liu, Q., & Zhou, Z. (2011). Plasmonic lens with multiple-turn spiral nano-structures. Plasmonics 6, 235-239.

Smolyaninov, I. I., Hung, Y. J., & Davis, C. C. (2007). Magnifying superlens in the visible frequency range. Science 315, 1699-1701.

Sun, H., Zhu, Y., Gao, B., Wang, P., & Yu, Y. (2017). Polarization-dependent quasi-far-field superfocusing strategy of nanoring-based plasmonic lenses. Nanoscale Res. Lett. 12, 386.

Takeda, M., Kimura, N., Inoue, T., & Aizawa, K. (2015). Plasmonic lens with multi-circular-slit apertures for improvement of light utilization efficiency. Jpn. J. Appl. Phys. 54, 09MG02.

Tsai, W. Y.; Huang, J. S.; Huang, B. C. (2014). Selective trapping or rotation of isotropic dielectric microparticles by optical near field in a plasmonic Archimedes spiral. Nano Lett. 14, 547-552.

Zhou, D. C., Mou, R., Bou, R., Li, Z., & Teng, S. Y. (2021). Compound plasmonic vortex generation based on spiral nanoslit. Front. Phys. 16, 33503.

Zijlstra, P., Chon, J. W. M., & Gu, M. (2009). Five-dimensional optical recording mediated by surface plasmons in gold nanorods. Nature 459, 410-413.




DOI: https://doi.org/10.58267/petrogas.v6i1.150

Refbacks

  • There are currently no refbacks.


Flag Counter