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ABSTRACT: This work is related to an earlier publication [Schwaiger et al., Phys. Rev. Lett. 102, 163903 (2009)], where we demonstrated by means of fiber-based transmission measurements that rolled-up Ag-(In)GaAs multilayers represent three-dimensional metamaterials with a plasma edge which is tunable over the visible and near-infrared regime by changing the thickness ratio of Ag and (In) GaAs, and predicted by means of finite-difference time-domain simulations that hyperlensing occurs at this frequency-tunable plasma edge. In the present work we develop a method to measure reflection curves on these structures and find that they correspond to the same tunable plasma edge. We find that retrieving the effective parameters from transmission and reflection data fails, because our realized metamaterials exceed the single-layer thicknesses of 5 nm, which we analyze to be the layer thickness limit for the applicability of effective parameter retrieval. We show that our realized structures nevertheless have the functionality of an effective metamaterial by supplying a detailed finite-difference time-domain study which compares light propagation through our realized structure (17-nm-thick Ag layers and 34-nm-thick GaAs layers) and light propagation through an idealized structure of the same total thickness but with very thin layers [2-nm-thick Ag layers and 4-nm-thick (In) GaAs layers]. In particular, our simulations predict broadband hyperlensing covering a large part of the visible spectrum for both the idealized and our realized structures.
Physical Review B. 06/2012; 85(23):235309.
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ABSTRACT: We propose and demonstrate the fabrication of a three-dimensional fishnet metamaterial by utilizing rolled-up nanotechnology. It consists of 6 alternating layers of silver and (In) GaAs with an array of subwavelength holes "drilled" by focused ion beams. By means of finite-integration technique simulations, we show that the fabricated structure is a single-negative material possessing a negative real part of the refractive index in the near-infrared regime. We show that the fabricated material can be made double negative by slightly changing the size of the holes. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4704185]
Applied Physics Letters 04/2012; 100(15):151104. · 3.84 Impact Factor
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ABSTRACT: We experimentally demonstrate that the transmission through rolled-up metal/semiconductor hyperlenses can be enhanced at desired frequencies utilizing Fabry-Perot resonances. By means of finite difference time domain simulations, we prove that hyperlensing occurs at frequencies of high transmission. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3659287]
Applied Physics Letters 11/2011; 99(19):191905. · 3.84 Impact Factor
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ABSTRACT: We report on strong coupling between surface plasmon polaritons on a thin silver film and laser dye Rhodamine 800. Attenuated total reflection measurements reveal that the pure surface plasmon polaritons interact with the Rhodamine 800 absorption lines exhibiting pronounced anticrossings in the dispersion relation. We show that the corresponding energy gap can be tailored by the concentration of dye molecules in the dielectric matrix between 50 meV and 70 meV. We can well model our data by a classical transfer matrix approach as well as by a quantum mechanical coupled oscillator ansatz.
Applied Physics Letters 08/2011; 99(5):051110-051110-3. · 3.84 Impact Factor
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ABSTRACT: We experimentally demonstrate that the transmission though rolled-up
metal/semiconductor hyperlenses can be enhanced at desired frequencies
utilizing Fabry-P\'erot resonances. By means of finite difference time domain
simulations we prove that hyperlensing occurs at frequencies of high
transmission.
07/2011;
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ABSTRACT: We investigate three-dimensional rolled-up metamaterials containing optically
active quantum wells and metal gratings supporting surface plasmon polarition
resonances. Finite-difference time-domain simulations show that by matching the
surface plasmon polarition resonance with the active wavelength regime of the
quantum well a strong transmission enhancement is observed when illuminating
the sample with p-polarized radiation. This transmission enhancement is further
increased by taking advantage of the Fabry-Perot resonances of the structure.
05/2011;
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Stephan Schwaiger,
Matthias Klingbeil,
Jochen Kerbst,
Andreas Rottler,
Ricardo Costa,
Aune Koitmäe,
Markus Bröll,
Christian Heyn,
Yuliya Stark,
Detlef Heitmann,
Stefan Mendach
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ABSTRACT: We demonstrate gain in a three-dimensional metal/semiconductor metamaterial
by the integration of optically active semiconductor quantum structures. The
rolling-up of a metallic structure on top of strained semiconductor layers
containing a quantum well allows us to achieve a three-dimensional superlattice
consisting of alternating layers of lossy metallic and amplifying gain
material. We show that the transmission through the superlattice can be
enhanced by exciting the quantum well optically under both pulsed or continuous
wave excitation. This points out that our structures can be used as a starting
point for arbitrary three-dimensional metamaterials including gain.
04/2011;
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ABSTRACT: We investigate the excitation of surface plasmon polaritons on silver tubes with finite-difference time-domain simulations. These surface plasmon polaritons exhibit azimuthal whispering gallery modes with quality factors in the hundreds. We show that the high quality factors arise from the coupling of the surface plasmon modes to photonic modes inside the tube. We examine the influence of a gain material on the quality factors and find that for material data of rhodamine 6G, the quality factors are enhanced significantly up to values of 3000.
Optics Letters 04/2011; 36(7):1240-2. · 3.40 Impact Factor
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Kay Dietrich,
Christian Strelow,
Constanze Schliehe,
Christian Heyn,
Andrea Stemmann, Stephan Schwaiger,
Stefan Mendach,
Alf Mews,
Horst Weller,
Detlef Heitmann,
Tobias Kipp
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ABSTRACT: We report on optical modes in rolled-up microtube resonators that are excited by PbS nanocrystals filled into the microtube core. Long ranging evanescent fields into the very thin walled microtubes cause strong emission of the nanocrystals into the resonator modes and a mode shift after a self-removal of the solvent. We present a method to precisely control the number, the energy and the localization of the modes along the microtube axis.
Nano Letters 02/2010; 10(2):627-31. · 13.20 Impact Factor
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ABSTRACT: We propose and realize a novel concept of a self-organized three-dimensional metamaterial with a plasma frequency in the visible regime. We utilize the concept of self-rolling strained layers to roll up InGaAs/GaAs/Ag multilayers with multiple rotations. The walls of the resulting tubes represent a radial superlattice with a tunable layer thickness ratio and lattice constant. We show that the plasma frequency of the radial superlattice can be tuned over a broad range in the visible and near infrared by changing the layer thickness ratio in good agreement with an effective metamaterial description. Finite difference time domain simulations reveal that the rolled-up radial superlattices can be used as hyperlenses in the visible.
Physical Review Letters 05/2009; 102(16):163903. · 7.37 Impact Factor
