Interplay of spatial filtering and dispersive effects in metamaterial superlenses

Jacek Pniewski; Rafał Kotyński

doi:10.1117/12.822397

20 November 2008 Interplay of spatial filtering and dispersive effects in metamaterial superlenses

Jacek Pniewski, Rafał Kotyński

Proceedings Volume 7141, 16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics; 71411G (2008) https://doi.org/10.1117/12.822397
Event: 16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 2008, Polanica Zdroj, Poland

Abstract

Propagation of continuous-wave (CW) Gaussian beams through a RHM-LHM interface as well as a metamaterial slab or a metallo-dielectric stack is subject to both spatial filtering and dispersive reshapement. Spatial filtering is polarisation-dependent and results from diraction, multiple reflections, and multiple positive or negative refractions on the layer boundaries. Structures with a broad and flat transmission spatial spectrum are capable of imaging with resolution exceeding the diraction limit. Due to strong Drude-type dispersion and absorption of the layers, it is possible to identify higher order dispersion eects taking place within very short distances. This opens the possibility of designing novel filters for joint reshaping of the spatial and temporal pulse envelopes. In the present work, we analyse the transmission of time-modulated CW Gaussian beam through structures with dispersive and lossy layers. Depending on beam divergence and the attenuation strength of the layers, the dominant eect may be identified as one-dimensional propagation with absorption and dispersion, negative refraction with dispersive modulation of the wavefront, or two-dimensional diractive focusing. We propose a theoretical model to explain the interplay of the observed spatial and dispersive phenomena. In the near diraction field pulses are reshaped and broadened. The slopes of the pulses become aected with side-lobes, and with a probable presence of superluminal eects. It is shown that the second-order dispersion eects do not yet provide a suciently accurate model for the pulse evolution. The simulations rely on a rigorous quasi-analytical planewave-based model of propagation. Transfer Matrix method (TMM) is used for numerical calculations.

Citation Download Citation

Jacek Pniewski and Rafał Kotyński "Interplay of spatial filtering and dispersive effects in metamaterial superlenses", Proc. SPIE 7141, 16th Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 71411G (20 November 2008); https://doi.org/10.1117/12.822397

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Gaussian beams

Metamaterials

Refractive index

Interfaces

Spatial filters

Beam propagation method

Wave propagation

Show All Keywords

Keywords/Phrases

Search In:

Publication Years