Broadband light absorption in graphene ribbons by canceling strong coupling at subwavelength scale

Xi Shi; Lixin Ge; Xiewen Wen; Dezhuan Han; Yaping Yang

doi:10.1364/OE.24.026357

Broadband light absorption in graphene ribbons by canceling strong coupling at subwavelength scale

Xi Shi^*
, Lixin Ge
, Xiewen Wen
, Dezhuan Han
, Yaping Yang

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

46 Citations (Scopus)

1 Downloads (CityUHK Scholars)

Abstract

We theoretically investigate the broadband light absorption in the THz range by canceling the strong coupling in an array of graphene ribbons at subwavelength scale. A series of resonators with different absorption frequencies can achieve a broadband absorber, however, the suppression of absorption always accompanies since the mutual coupling between resonators cause the mode splitting. By adjusting the near- and far-field coupling between the plasmon resonances of the graphene ribbon array to the critical point, the absorption linewidth is broadened for almost one magnitude larger than that of individual graphene ribbon, to be ∼1 THz. Our study provides not only insight understanding but also new approaches towards the broadband graphene absorber.

Original language	English
Pages (from-to)	26357-26362
Journal	Optics Express
Volume	24
Issue number	23
DOIs	https://doi.org/10.1364/OE.24.026357
Publication status	Published - 14 Nov 2016
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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abstract = "We theoretically investigate the broadband light absorption in the THz range by canceling the strong coupling in an array of graphene ribbons at subwavelength scale. A series of resonators with different absorption frequencies can achieve a broadband absorber, however, the suppression of absorption always accompanies since the mutual coupling between resonators cause the mode splitting. By adjusting the near- and far-field coupling between the plasmon resonances of the graphene ribbon array to the critical point, the absorption linewidth is broadened for almost one magnitude larger than that of individual graphene ribbon, to be ∼1 THz. Our study provides not only insight understanding but also new approaches towards the broadband graphene absorber.",

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AU - Shi, Xi

AU - Ge, Lixin

AU - Wen, Xiewen

AU - Han, Dezhuan

AU - Yang, Yaping

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2016/11/14

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N2 - We theoretically investigate the broadband light absorption in the THz range by canceling the strong coupling in an array of graphene ribbons at subwavelength scale. A series of resonators with different absorption frequencies can achieve a broadband absorber, however, the suppression of absorption always accompanies since the mutual coupling between resonators cause the mode splitting. By adjusting the near- and far-field coupling between the plasmon resonances of the graphene ribbon array to the critical point, the absorption linewidth is broadened for almost one magnitude larger than that of individual graphene ribbon, to be ∼1 THz. Our study provides not only insight understanding but also new approaches towards the broadband graphene absorber.

AB - We theoretically investigate the broadband light absorption in the THz range by canceling the strong coupling in an array of graphene ribbons at subwavelength scale. A series of resonators with different absorption frequencies can achieve a broadband absorber, however, the suppression of absorption always accompanies since the mutual coupling between resonators cause the mode splitting. By adjusting the near- and far-field coupling between the plasmon resonances of the graphene ribbon array to the critical point, the absorption linewidth is broadened for almost one magnitude larger than that of individual graphene ribbon, to be ∼1 THz. Our study provides not only insight understanding but also new approaches towards the broadband graphene absorber.

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DO - 10.1364/OE.24.026357

M3 - RGC 21 - Publication in refereed journal

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EP - 26362

JO - Optics Express

JF - Optics Express

IS - 23

ER -

Broadband light absorption in graphene ribbons by canceling strong coupling at subwavelength scale

Abstract

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