Microspectroscopy on perovskite-based superlenses [Invited]

Kehr, Susanne C.; Yu, Pu; Liu, Yongmin; Parzefall, Markus; Khan, Asif Islam; Jacob, Rainer; Wenzel, Marc Tobias; Ribbeck, H. G. von; Helm, M.; Zhang, Xiang; Eng, Lukas M.; Ramesh, R.

doi:10.1364/ome.1.001051

Cited by 14 publications

(24 citation statements)

References 35 publications

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“…Consequently, layered perovskite superlenses could be used as bandpass filters for near-field spectroscopic imaging. 177 2D materials like graphene are promising for superlens-type evanescent field growth for continuously-tunable imaging of subsurface structures at IR and THz frequencies while additionally avoiding the practical challenges of depositing a high quality (i.e. low loss) superlens.…”

Section: B Leveraging Superlensing and Near-field Optics For Imagingmentioning

confidence: 99%

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: B Leveraging Superlensing and Near-field Optics For Imagingmentioning

confidence: 99%

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

2016

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“…of local stress distribution, 31 polytypism, 32 dopant and charge carrier concentration, 18,23,33,34 or change in anisotropy tensor orientation. [24][25][26][27] In general, strong near-field resonances have been observed for various crystalline structures, 17,[24][25][26][27][28][29][30][31][34][35][36][37][38] indicating that spectroscopic near-field material analysis is applicable to a manifold of different material types that await to be inspected at the nanometer length scale.…”

Section: Introductionmentioning

confidence: 99%

Polarization-dependent near-field phonon nanoscopy of oxides: SrTiO3, LiNbO3 , and PbZr0.2Ti0.8
Wehmeier
¹
,
Lang
²
,
Liu
³

et al. 2019
Phys. Rev. B
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Resonant infrared near-field optical spectroscopy provides a highly material-specific response with sub-wavelength lateral resolution of ∼ 10 nm. Here, we report on the study of the near-field response of selected paraelectric and ferroelectric materials, i.e. SrTiO 3 , LiNbO 3 , and PbZr 0.2 Ti 0.8 O 3 , showing resonances in the wavelength range from 13.0 to 15.8 µm. We investigate these materials using scattering scanning near-field optical microscopy (s-SNOM) in combination with a tunable mid-infrared free-electron laser (FEL). Fundamentally, we demonstrate that phonon-induced resonant near-field excitation is possible for both p-and s-polarized incident light, a fact that is of particular interest for the nanoscopic investigation of anisotropic and hyperbolic materials. Moreover, we exploit that near-field spectroscopy, as compared to far-field techniques, bears substantial advantages such as lower penetration depths, stronger confinement, and a high spatial resolution.The latter permits the investigation of minute material volumes, e.g. with nanoscale changes in crystallographic structure, which we prove here via near-field imaging of ferroelectric domain structures in PbZr 0.2 Ti 0.8 O 3 thin films.

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“…at the phonon resonances in dielectrics 15,16,17 as well as at the plasmon resonances for metals, 18 semiconductors, 19 or graphene. 20,21 The imaging capabilities of such a lens are not limited by diffraction, however, the optical resolution and the signal contrast are reduced by material absorption and interface roughness.…”

mentioning

confidence: 99%

“…15,16,17 Furthermore, these fixed-position superlenses we fabricated by thin-film growth and so far were designed solely in a laterally large-scale fashion. 16,17,19 A Local Superlens by S.C. Kehr et al…”

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confidence: 99%

A Local Superlens

et al. 2015

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Superlenses enable near-field imaging beyond the optical diffraction limit. However, their widespread implementation in optical imaging technology so far has been limited by large-scale fabrication, fixed lens position, and specific object materials. Here we demonstrate that a dielectric lamella of subwavelength size in all three spatial dimensions behaves as a compact superlens that operates at infrared wavelengths and can be positioned to image any local microscopic area of interest on the sample. In particular, the lamella superlens may be placed in contact with any type of object and therefore enables examination of hard-to-scan samples, for example, with high topography or in liquids, without altering the specimen design. This lamella-based local superlens design is directly applicable to subwavelength light-based technology, such as integrated optics.

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Microspectroscopy on perovskite-based superlenses [Invited]

Cited by 14 publications

References 35 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

Polarization-dependent near-field phonon nanoscopy of oxides: SrTiO3, LiNbO3 , and PbZr0.2Ti0.8
Wehmeier
¹
,
Lang
²
,
Liu
³

et al. 2019
Phys. Rev. B
Self Cite
23
5
23
0
View full text Add to dashboard Cite

A Local Superlens

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Microspectroscopy on perovskite-based superlenses [Invited]

Cited by 14 publications

References 35 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

Polarization-dependent near-field phonon nanoscopy of oxides: SrTiO3, LiNbO3 , and PbZr0.2Ti0.8Wehmeier1, Lang2, Liu3 et al. 2019Phys. Rev. BSelf Cite235230View full textAdd to dashboardCite

A Local Superlens

Contact Info

Product

Resources

About

Polarization-dependent near-field phonon nanoscopy of oxides: SrTiO3, LiNbO3 , and PbZr0.2Ti0.8
Wehmeier
¹
,
Lang
²
,
Liu
³

et al. 2019
Phys. Rev. B
Self Cite
23
5
23
0
View full text Add to dashboard Cite