Subwavelength focusing using radiationless inteference at optical wavelengths

R. Gordon

doi:10.1117/12.820535

12 May 2009 Subwavelength focusing using radiationless inteference at optical wavelengths

R. Gordon

Proceedings Volume 7353, Metamaterials IV; 73530Y (2009) https://doi.org/10.1117/12.820535
Event: SPIE Optics + Optoelectronics, 2009, Prague, Czech Republic

Abstract

In this work, I propose two methods for extending radiationless intereference to achieve an extreme subwavelength focus in the visible part of the optical spectrum. These methods are based on metal-insulator-metal (MIM) waveguide structures. The first uses the transverse evanescent field from a slit-coupled MIM waveguide. The second uses the highest order mode of a MIM waveguide array. Subwavelength focusing to a tenth of the optical wavelength is demonstrated numerically. Considering recent experiments, the proposed structures are practically viable. Methods to overcome other technical issues associated with this proposal are discussed.

Citation Download Citation

R. Gordon "Subwavelength focusing using radiationless inteference at optical wavelengths", Proc. SPIE 7353, Metamaterials IV, 73530Y (12 May 2009); https://doi.org/10.1117/12.820535

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