Funneling Light through a Subwavelength Aperture with Epsilon-Near-Zero Materials

Adams, David C.; Inampudi, Sandeep; Ribaudo, Troy; Slocum, David; Vangala, Shivashankar; Kuhta, Nicholas A.; Goodhue, W. D.; Podolskiy, Viktor A.; Wasserman, D.

doi:10.1103/physrevlett.107.133901

Cited by 155 publications

(102 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For noblemetal plasmonic structures, the electrostatic resonances tend to occur in the visible and near-IR, with Q in the 20-40 range, depending on the particular data set and material, corresponding to modal lifetimes on the order of 10 fs. In doped III-V semiconductors such as GaAs, InAs, and various alloys, the modal lifetime can be as long as 100 fs, but the typical operating wavelengths are near 10 μm [29,118,119]. As a result, no improvement in the Q over the metallic case is expected.…”

Section: The Promise Of Phonon Polaritons: a Comparison With Plasmonicsmentioning

confidence: 99%

Low-loss, infrared and terahertz nanophotonics using surface phonon polaritons

et al. 2015

View full text Add to dashboard Cite

Abstract:The excitation of surface-phonon-polariton (SPhP) modes in polar dielectric crystals and the associated new developments in the field of SPhPs are reviewed. The emphasis of this work is on providing an understanding of the general phenomenon, including the origin of the Reststrahlen band, the role that optical phonons in polar dielectric lattices play in supporting sub-diffraction-limited modes and how the relatively long optical phonon lifetimes can lead to the low optical losses observed within these materials. Based on this overview, the achievements attained to date and the potential technological advantages of these materials are discussed for localized modes in nanostructures, propagating modes on surfaces and in waveguides and novel metamaterial designs, with the goal of realizing low-loss nanophotonics and metamaterials in the mid-infrared to terahertz spectral ranges.

show abstract

Section: The Promise Of Phonon Polaritons: a Comparison With Plasmonicsmentioning

confidence: 99%

Low-loss, infrared and terahertz nanophotonics using surface phonon polaritons

et al. 2015

View full text Add to dashboard Cite

show abstract

“…As one such example, the use of heavily doped semiconductors as ENZ materials was demonstrated to enhance the transmission of light through subwavelength apertures. 50,51 For any bulk ENZ material, we can describe wave propagation with a complex wavevector, k ¼ ω ffiffiffiffiffi εμ p , which effectively determines the propagation length and local wavelength of light at ENZ frequencies. Assuming μ ¼ μ o (as we will throughout this paper), we can gain an effective measure of the quality of any bulk ENZ material by determining the imaginary component (κ) of the complex refractive index (n ∼ ¼ n þ iκ) at the wavelength λ ENZ , where the real part of the refractive index is minimum ½nð∼λ ENZ Þ.…”

Section: Enz Materialsmentioning

confidence: 99%

Review of mid-infrared plasmonic materials

et al. 2015

View full text Add to dashboard Cite

Abstract. The field of plasmonics has the potential to enable unique applications in the midinfrared (IR) wavelength range. However, as is the case regardless of wavelength, the choice of plasmonic material has significant implications for the ultimate utility of any plasmonic device or structure. In this manuscript, we review the wide range of available plasmonic and phononic materials for mid-IR wavelengths, looking in particular at transition metal nitrides, transparent conducting oxides, silicides, doped semiconductors, and even newer plasmonic materials such as graphene. We also include in our survey materials with strong mid-IR phonon resonances, such as GaN, GaP, SiC, and the perovskite SrTiO 3 , all of which can support plasmon-like modes over limited wavelength ranges. We will discuss the suitability of each of these plasmonic and phononic materials, as well as the more traditional noble metals for a range of structures and applications and will discuss the potential and limitations of alternative plasmonic materials at these IR wavelengths.

show abstract

“…The refractive index of a metamaterial can be tailored to be negative, 13 close to zero, [14][15][16][17][18][19] 12,21,22 Among various metamaterials, zero-index-metamaterial (ZIM, n = 0), was first presented by Enoch et al 23 in 2002, and has received consistent attention in the microwave, 24,25 THz, 26,27 optics, 14,28 and even acoustics. 29 According to Snell's Law of refraction between two media (n 1 sin θ 1 = n 2 sin θ 2 ), if one medium is a ZIM with n 1 = 0 and the other one has n 2 = 0, then whatever the incident angle θ 1 is, the refraction angle θ 2 will trend to zero.…”

Section: Introductionmentioning

confidence: 99%

Low-index-metamaterial for gain enhancement of planar terahertz antenna

Zhang

Huang

et al. 2014

AIP Advances

View full text Add to dashboard Cite

We theoretically present a high gain planar antenna at terahertz (THz) frequencies by combing a conventional log-periodic antenna (LPA) with a low-index-metamaterial (LIM, |n| < 1). The LIM is realized by properly designing a fishnet metamaterial using full-wave finite-element simulation. Owing to the impedance matching, the LIM can be placed seamlessly on the substrate of the LPA without noticeable reflection. The effectiveness of using LIM for antenna gain enhancement is confirmed by comparing the antenna performance with and without LIM, where significantly improved half-power beam-width (3-dB beam-width) and more than 4 dB gain enhancement are seen within a certain frequency range. The presented LIM-enhanced planar THz antenna is compact, flat, low profile, and high gain, which has extensive applications in THz systems, including communications, radar, and spectroscopy.

show abstract

Funneling Light through a Subwavelength Aperture with Epsilon-Near-Zero Materials

Cited by 155 publications

References 28 publications

Low-loss, infrared and terahertz nanophotonics using surface phonon polaritons

Low-loss, infrared and terahertz nanophotonics using surface phonon polaritons

Review of mid-infrared plasmonic materials

Low-index-metamaterial for gain enhancement of planar terahertz antenna

Contact Info

Product

Resources

About