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Optical orbital angular momentum conservation during the transfer process from plasmonic vortex lens to light.

Yu H, Zhang H, Wang Y, Han S, Yang H, Xu X, Wang Z, Petrov V, Wang J - Sci Rep (2013)

Bottom Line: We demonstrate the optical orbital angular momentum conservation during the transfer process from subwavelength plasmonic vortex lens (PVLs) to light and the generating process of surface plasmon polaritons (SPPs).The angular momentum of twisting SP electromagnetic field is tunable by the twisted metal/dielectric interfaces of PVLs and angular momentum of illuminating singular light.This work may open the door for several possible applications of SP vortices in subwavelength region.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, China.

ABSTRACT
We demonstrate the optical orbital angular momentum conservation during the transfer process from subwavelength plasmonic vortex lens (PVLs) to light and the generating process of surface plasmon polaritons (SPPs). Illuminating plasmonic vortex lenses with beams carrying optical orbital angular momentum, the SP vortices with orbital angular momentum were generated and inherit the optical angular momentum of light beams and PVLs. The angular momentum of twisting SP electromagnetic field is tunable by the twisted metal/dielectric interfaces of PVLs and angular momentum of illuminating singular light. This work may open the door for several possible applications of SP vortices in subwavelength region.

No MeSH data available.


Related in: MedlinePlus

Experimental patterns and theoretical analysis of the SP vortices using a PVL with m = 10.(a) Experimental patterns using linearly polarized LG0,−1 mode and a PVL with m = 10. (b) Experimental data (red lines) of the intensity distribution through the centers of obtained SP vortex patterns corresponding the patterns (a), and the theoretical fitting (black lines) of experimental data (red lines) with respective  functions shown in eq. (2) with n = 9 and the adjusted size of the pattern.
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f4: Experimental patterns and theoretical analysis of the SP vortices using a PVL with m = 10.(a) Experimental patterns using linearly polarized LG0,−1 mode and a PVL with m = 10. (b) Experimental data (red lines) of the intensity distribution through the centers of obtained SP vortex patterns corresponding the patterns (a), and the theoretical fitting (black lines) of experimental data (red lines) with respective functions shown in eq. (2) with n = 9 and the adjusted size of the pattern.

Mentions: In order to investigate the angular momentum conservation deeply, the mirror symmetry operation for the PVLs was made by inverting the surface of PVLs. The structure of PVLs became left-handed rotation which is opposite to the incident light beams with LG0,l modes. In this condition, the sign of the PVLs' geometric topological charge m is positive, and the total topological charge is n = l + m. As representative results, the patterns with l = −1 and m = 10 are shown in Fig. 4 (a). The intensity distribution of cross sections (red line) through the center are presented in Fig. 4 (b) of this figure with topological charges of 9. It should be noted that the results show the PVLs can also be used as an optoelectronic device for determination of the topological charge of incident light beams and the total angular momentum is conserved during the process of SPP generation.


Optical orbital angular momentum conservation during the transfer process from plasmonic vortex lens to light.

Yu H, Zhang H, Wang Y, Han S, Yang H, Xu X, Wang Z, Petrov V, Wang J - Sci Rep (2013)

Experimental patterns and theoretical analysis of the SP vortices using a PVL with m = 10.(a) Experimental patterns using linearly polarized LG0,−1 mode and a PVL with m = 10. (b) Experimental data (red lines) of the intensity distribution through the centers of obtained SP vortex patterns corresponding the patterns (a), and the theoretical fitting (black lines) of experimental data (red lines) with respective  functions shown in eq. (2) with n = 9 and the adjusted size of the pattern.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3824164&req=5

f4: Experimental patterns and theoretical analysis of the SP vortices using a PVL with m = 10.(a) Experimental patterns using linearly polarized LG0,−1 mode and a PVL with m = 10. (b) Experimental data (red lines) of the intensity distribution through the centers of obtained SP vortex patterns corresponding the patterns (a), and the theoretical fitting (black lines) of experimental data (red lines) with respective functions shown in eq. (2) with n = 9 and the adjusted size of the pattern.
Mentions: In order to investigate the angular momentum conservation deeply, the mirror symmetry operation for the PVLs was made by inverting the surface of PVLs. The structure of PVLs became left-handed rotation which is opposite to the incident light beams with LG0,l modes. In this condition, the sign of the PVLs' geometric topological charge m is positive, and the total topological charge is n = l + m. As representative results, the patterns with l = −1 and m = 10 are shown in Fig. 4 (a). The intensity distribution of cross sections (red line) through the center are presented in Fig. 4 (b) of this figure with topological charges of 9. It should be noted that the results show the PVLs can also be used as an optoelectronic device for determination of the topological charge of incident light beams and the total angular momentum is conserved during the process of SPP generation.

Bottom Line: We demonstrate the optical orbital angular momentum conservation during the transfer process from subwavelength plasmonic vortex lens (PVLs) to light and the generating process of surface plasmon polaritons (SPPs).The angular momentum of twisting SP electromagnetic field is tunable by the twisted metal/dielectric interfaces of PVLs and angular momentum of illuminating singular light.This work may open the door for several possible applications of SP vortices in subwavelength region.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, China.

ABSTRACT
We demonstrate the optical orbital angular momentum conservation during the transfer process from subwavelength plasmonic vortex lens (PVLs) to light and the generating process of surface plasmon polaritons (SPPs). Illuminating plasmonic vortex lenses with beams carrying optical orbital angular momentum, the SP vortices with orbital angular momentum were generated and inherit the optical angular momentum of light beams and PVLs. The angular momentum of twisting SP electromagnetic field is tunable by the twisted metal/dielectric interfaces of PVLs and angular momentum of illuminating singular light. This work may open the door for several possible applications of SP vortices in subwavelength region.

No MeSH data available.


Related in: MedlinePlus