Abstract
An elliptical nano-pinhole structure-based plasmonic lens was designed and investigated experimentally by means of focused ion beam nanofabrication, atomic force microscope imaging, and scanning near-field optical microscope (NSOM). Two scan modes, tip scan and sample scan, were employed, respectively, in our NSOM measurements. Both the scan modes have their characteristics while probing the plasmonic lenses. Our experimental results demonstrated that the lens can realize subwavelength focusing with elongated depth of focus. This type of lens can be used in micro-systems such as micro-opto-electrical–mechanical systems for biosensing, subwavelength imaging, and data storage.
Similar content being viewed by others
References
Stockman MI (2004) Nanofocusing of optical energy in tapered plasmonicwaveguides. Phys Rev Lett 93:137404
Baida FI, Belkhir A (2009) Superfocusing and light confinement by surface plasmon excitation through radially polarized beam. Plasmonics 4:51–59
Fu Y, Zhou W, Lim LEN, Du CL, Luo XG (2007) Plasmonic microzone plate: superfocusing at visible regime. Appl Phys Lett 91:061124
Fu Y, Liu Y, Zhou X, Zhu S (2010) Experimental demonstration of focusing and lasing of plasmonic lens with chirped circular slits. Opt Express 18(4):3438–3443
Jia B, Shi H, Li J, Fu Y, Du C, Gu M (2009) Near-field visualization of focal depth modulation by step corrugated plasmonic slits. Appl Phys Lett 94:151912
Fu Y, Zhou X, Liu Y (2010) Ultra-enhanced lasing effect of plasmonic lens structured with elliptical nano-pinholes distributed in variant period. Plasmonics 5(2):111–116
Fu Y, Zhou X (2010) Topical review: plasmonic lenses, Plasmonics 5(3). doi:10.1007/s11468-010-9144-9
Yanai A, Levy U (2009) Plasmonic focusing with a coaxial structure illuminated by radially polarized light. Opt Express 17:924–932
Liu Z, Steele JM, Srituravanich W, Pikus Y, Sun C, Zhang X (2005) Focusing surface plasmons with a plasmonic lens. Nano Lett 5:1726–1729
Liu Z, Steele JM, Lee H, Zhang X (2006) Tuning the focus of a plasmonic lens by the incident angle. Appl Phys Lett 88:171108
Steele JM, Liu Z, Wang Y, Zhang X (2006) Resonant and non-resonant generation and focusing of surface plasmons with circular gratings. Opt Express 14:5664–5670
Fu Y, Zhou W, Lennie LEN (2008) Nano-pinhole-based optical superlens. Res Lett Phys 2008:148505
Xiuli Z, Yongqi Fu, Shi-Yong W, An-Jing P, Zhong-Heng C (2008) Funnel-shaped arrays of metal nano-cylinders for nano-focusing. Chin Phys Lett 25:3296–3299
Lerman GM, Yanai A, Levy U (2009) Demonstration of nanofocusing by the use of plasmonic lens illuminated with radially polarized light. Nano Lett 9:2139–2143
Zhan Q (2009) Adv Opt Photonics 1:1–57
Fu Y, Zhou W, Lennie LEN, Du C (2007) Influences of V-shaped plasmonic nanostructures on transmission properties. Appl Phys B 86:461–466
Fu Y, Bryan NKA (2005) Investigation of physical properties of quartz via focused ion beam bombardment. Appl Phys B 80:581–585
Acknowledgment
The work was supported by the National Natural Science Foundation of China (No.60877021 and No.61077010).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Zhang, Y., Fu, Y., Liu, Y. et al. Experimental Study of Metallic Elliptical Nano-Pinhole Structure-Based Plasmonic Lenses. Plasmonics 6, 219–226 (2011). https://doi.org/10.1007/s11468-010-9191-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11468-010-9191-2