Limits...
Graphene plasmonic lens for manipulating energy flow.

Wang G, Liu X, Lu H, Zeng C - Sci Rep (2014)

Bottom Line: Because photons are uncharged, it is still difficult to effectively control them by electrical means.It is found that the proposed lens can be utilized to focus and collimate the GP waves propagating along the graphene sheet.As an application of such a lens, the image transfer of two point sources with a separation of λ₀/30 is demonstrated.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China.

ABSTRACT
Manipulating the energy flow of light is at the heart of modern information and communication technologies. Because photons are uncharged, it is still difficult to effectively control them by electrical means. Here, we propose a graphene plasmonic (GP) lens to efficiently manipulate energy flow by elaborately designing the thickness of the dielectric spacer beneath the graphene sheet. Different from traditional metal-based lenses, the proposed graphene plasmonic lens possesses the advantages of tunability and excellent confinement of surface plasmons. It is found that the proposed lens can be utilized to focus and collimate the GP waves propagating along the graphene sheet. Particularly, the lens is dispersionless over a wide frequency range and the performance of lens can be flexibly tuned by adjusting the bias voltage. As an application of such a lens, the image transfer of two point sources with a separation of λ₀/30 is demonstrated.

No MeSH data available.


Related in: MedlinePlus

Path of light propagating in GRIN media when the incident light is plane source (a) and point source (b).
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f8: Path of light propagating in GRIN media when the incident light is plane source (a) and point source (b).

Mentions: As the examples, the path of the light propagating in GRIN media is shown in Fig. 8. It can be seen that when the proposed Selfoc lens is used as an optical coupler, the length of the lens should be P/4. When it is used to realize the image transfer, the length of the lens should be P/2.


Graphene plasmonic lens for manipulating energy flow.

Wang G, Liu X, Lu H, Zeng C - Sci Rep (2014)

Path of light propagating in GRIN media when the incident light is plane source (a) and point source (b).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3921639&req=5

f8: Path of light propagating in GRIN media when the incident light is plane source (a) and point source (b).
Mentions: As the examples, the path of the light propagating in GRIN media is shown in Fig. 8. It can be seen that when the proposed Selfoc lens is used as an optical coupler, the length of the lens should be P/4. When it is used to realize the image transfer, the length of the lens should be P/2.

Bottom Line: Because photons are uncharged, it is still difficult to effectively control them by electrical means.It is found that the proposed lens can be utilized to focus and collimate the GP waves propagating along the graphene sheet.As an application of such a lens, the image transfer of two point sources with a separation of λ₀/30 is demonstrated.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China.

ABSTRACT
Manipulating the energy flow of light is at the heart of modern information and communication technologies. Because photons are uncharged, it is still difficult to effectively control them by electrical means. Here, we propose a graphene plasmonic (GP) lens to efficiently manipulate energy flow by elaborately designing the thickness of the dielectric spacer beneath the graphene sheet. Different from traditional metal-based lenses, the proposed graphene plasmonic lens possesses the advantages of tunability and excellent confinement of surface plasmons. It is found that the proposed lens can be utilized to focus and collimate the GP waves propagating along the graphene sheet. Particularly, the lens is dispersionless over a wide frequency range and the performance of lens can be flexibly tuned by adjusting the bias voltage. As an application of such a lens, the image transfer of two point sources with a separation of λ₀/30 is demonstrated.

No MeSH data available.


Related in: MedlinePlus