Loss-compensated and active hyperbolic metamaterials

Ni, Xingjie; Ishii, Satoshi; Thoreson, Mark D.; Shalaev, Vladimir M.; Han, Seung-Hoon; Lee, Sang Yoon; Kildishev, Alexander V.

doi:10.1364/oe.19.025242

Cited by 126 publications

(97 citation statements)

References 29 publications

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“…Most notably, the application of gain media has appeared in the literature. [49][50][51][52][53][54][55][56][57][58][59] There are problems, however, with the employment of gain media in metamaterials as Stockman has pointed out. 196 Notably, full or overcompensation of losses with gain leads to instability that brings the metamaterial into a spaser state.…”

Section: A Future Research For Superlens Imagingmentioning

confidence: 99%

“…While there are designs for isotropic negative index metamaterials (NIMs), 46,47 there exists no experimental 3D isotropic optical NIMs suitable for perfect imaging as envisioned by Pendry due to the constraints of nanofabrication and absorptive losses. 16,48 Fortunately, a number of promising loss compensation methods have appeared, including the employment of gain media, [49][50][51][52][53][54][55][56][57][58][59] geometric tailoring, 60 and plasmon injection. [61][62][63][64][65] Somewhat surprisingly, there is less detailed treatment given in the literature to the practical matter of extracting the image from a near-field superlens than one might expect.…”

Section: Introductionmentioning

confidence: 99%

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Review of near-field optics and superlenses for sub-diffraction-limited nano-imaging

2016

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Near-field optics and superlenses for imaging beyond Abbe's diffraction limit are reviewed. A comprehensive and contemporary background is given on scanning near-field microscopy and superlensing. Attention is brought to recent research leveraging scanning near-field optical microscopy with superlenses for new nano-imaging capabilities. Future research directions are explored for realizing the goal of low-cost and high-performance sub-diffraction-limited imaging systems. © 2016 Author(s)

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Section: A Future Research For Superlens Imagingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Review of near-field optics and superlenses for sub-diffraction-limited nano-imaging

2016

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“…Our approach does not lead to any form of stimulated emission or coherent single mode emission and thus is distinctly different from active schemes in plasmonics used to realize spasers [40][41][42]45 or to compensate loss 47,48 .…”

mentioning

confidence: 98%

Active thermal extraction of near-field thermal radiation

2016

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Radiative heat transport between materials supporting surface-phonon polaritons is greatly enhanced when the materials are placed at sub-wavelength separation as a result of the contribution of near-field surface modes. However, the enhancement is limited to small separations due to the evanescent decay of the surface waves. In this work, we propose and numerically demonstrate an active scheme to extract these modes to the far-field. Our approach exploits the monochromatic nature of near-field thermal radiation to drive a transition in a laser gain medium, which, when coupled with external optical pumping, allows the resonant surface mode to be emitted into the far-field. Our study demonstrates a new approach to manipulate thermal radiation that could find applications in thermal management.

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“…Strategies for reducing losses in plasmonic and HMMs have therefore been proposed, including clever design of passive structures and incorporation of active, i.e. gain media [19][20][21][22] . An exemplary case of the former strategy is the fishnet metamaterial 23,24 , whereby air voids in an otherwise continuous MD multilayer open new channels for optical transmission.…”

Section: Introductionmentioning

confidence: 99%

Gain-enhanced high-k transmission through metal-semiconductor hyperbolic metamaterials

Smalley¹,

Vallini²,

Shahin³

et al. 2015

Opt. Mater. Express

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We analyze the steady-state transmission of high-momentum (high-k) electromagnetic waves through metal-semiconductor multilayer systems with loss and gain in the near-infrared (NIR). Using a semi-classical optical gain model in conjunction with the scattering matrix method (SMM), we study indium gallium arsenide phosphide (InGaAsP) quantum wells as the active semiconductor, in combination with the metals, aluminum-doped zinc oxide (AZO) and silver (Ag). Under moderate external pumping levels, we find that NIR transmission through Ag/InGaAsP systems may be enhanced by several orders of magnitude relative to the unpumped case, over a large angular and frequency bandwidth. Conversely, transmission enhancement through AZO/InGaAsP systems is orders of magnitude smaller, and has a strong frequency dependence. We discuss the relative importance of Purcell enhancement on our results and validate analytical calculations based on the SMM with numerical finite-difference time domain simulations.

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Loss-compensated and active hyperbolic metamaterials

Cited by 126 publications

References 29 publications

Review of near-field optics and superlenses for sub-diffraction-limited nano-imaging

Review of near-field optics and superlenses for sub-diffraction-limited nano-imaging

Active thermal extraction of near-field thermal radiation

Gain-enhanced high-k transmission through metal-semiconductor hyperbolic metamaterials

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