Subwavelength nondiffraction beam generated by a plasmonic lens

Ding Zheng Lin; Chih Hao Chen; Chin Kai Chang; Tsung Dar Cheng; Chau Shioung Yeh; Chih Kung Lee

doi:10.1063/1.2943274

Subwavelength nondiffraction beam generated by a plasmonic lens

Ding Zheng Lin, Chih Hao Chen, Chin Kai Chang, Tsung Dar Cheng, Chau Shioung Yeh, Chih Kung Lee

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

We experimentally examined the near-field and far-field optical properties of a subwavelength annular aperture (SAA) made on silver film and undertook finite difference time domain simulations. In our near-field measurements, an interference pattern with a period very close to half of the surface plasmon (SP) wavelength (λSP 2) was found on the surface of the silver film. Moreover, we observed that the transmitted light of the 442 nm incident laser was focused at several micrometers behind the silver SAA structure at a tiny spot (354 nm) and with a remarkable 31 μm depth of focus. This implies that the silver SAA structure can generate a nondiffraction beam and can be used to fabricate high aspect ratio subwavelength structures.

Original language	English
Article number	233106
Journal	Applied Physics Letters
Volume	92
Issue number	23
DOIs	https://doi.org/10.1063/1.2943274
Publication status	Published - 2008

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.2943274

Cite this

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title = "Subwavelength nondiffraction beam generated by a plasmonic lens",

abstract = "We experimentally examined the near-field and far-field optical properties of a subwavelength annular aperture (SAA) made on silver film and undertook finite difference time domain simulations. In our near-field measurements, an interference pattern with a period very close to half of the surface plasmon (SP) wavelength (λSP 2) was found on the surface of the silver film. Moreover, we observed that the transmitted light of the 442 nm incident laser was focused at several micrometers behind the silver SAA structure at a tiny spot (354 nm) and with a remarkable 31 μm depth of focus. This implies that the silver SAA structure can generate a nondiffraction beam and can be used to fabricate high aspect ratio subwavelength structures.",

author = "Lin, {Ding Zheng} and Chen, {Chih Hao} and Chang, {Chin Kai} and Cheng, {Tsung Dar} and Yeh, {Chau Shioung} and Lee, {Chih Kung}",

note = "Funding Information: This work was financially supported by the Material & Chemical Research Laboratory of the Industrial Technology Research Institute (ITRI) and by Taiwan{\textquoteright}s National Science Council through Grant No. NSC 96-2221-E-002-009.",

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doi = "10.1063/1.2943274",

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T1 - Subwavelength nondiffraction beam generated by a plasmonic lens

AU - Lin, Ding Zheng

AU - Chen, Chih Hao

AU - Chang, Chin Kai

AU - Cheng, Tsung Dar

AU - Yeh, Chau Shioung

AU - Lee, Chih Kung

N1 - Funding Information: This work was financially supported by the Material & Chemical Research Laboratory of the Industrial Technology Research Institute (ITRI) and by Taiwan’s National Science Council through Grant No. NSC 96-2221-E-002-009.

PY - 2008

Y1 - 2008

N2 - We experimentally examined the near-field and far-field optical properties of a subwavelength annular aperture (SAA) made on silver film and undertook finite difference time domain simulations. In our near-field measurements, an interference pattern with a period very close to half of the surface plasmon (SP) wavelength (λSP 2) was found on the surface of the silver film. Moreover, we observed that the transmitted light of the 442 nm incident laser was focused at several micrometers behind the silver SAA structure at a tiny spot (354 nm) and with a remarkable 31 μm depth of focus. This implies that the silver SAA structure can generate a nondiffraction beam and can be used to fabricate high aspect ratio subwavelength structures.

AB - We experimentally examined the near-field and far-field optical properties of a subwavelength annular aperture (SAA) made on silver film and undertook finite difference time domain simulations. In our near-field measurements, an interference pattern with a period very close to half of the surface plasmon (SP) wavelength (λSP 2) was found on the surface of the silver film. Moreover, we observed that the transmitted light of the 442 nm incident laser was focused at several micrometers behind the silver SAA structure at a tiny spot (354 nm) and with a remarkable 31 μm depth of focus. This implies that the silver SAA structure can generate a nondiffraction beam and can be used to fabricate high aspect ratio subwavelength structures.

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Subwavelength nondiffraction beam generated by a plasmonic lens

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