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Showing 1 to 12 of 100 entries
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Continuous control of the nonlinearity phase for harmonic generations.

Nature materials

Li G, Chen S, Pholchai N, Reineke B, Wong PW, Pun EY, Cheah KW, Zentgraf T, Zhang S.
PMID: 25849530
Nat Mater. 2015 Jun;14(6):607-12. doi: 10.1038/nmat4267. Epub 2015 Apr 13.

The capability of locally engineering the nonlinear optical properties of media is crucial in nonlinear optics. Although poling is the most widely employed technique for achieving locally controlled nonlinearity, it leads only to a binary nonlinear state, which is...

Phosphorylation Affects DNA-Binding of the Senescence-Regulating bZIP Transcription Factor GBF1.

Plants (Basel, Switzerland)

Smykowski A, Fischer SM, Zentgraf U.
PMID: 27135347
Plants (Basel). 2015 Sep 16;4(3):691-709. doi: 10.3390/plants4030691.

Massive changes in the transcriptome of Arabidopsis thaliana during onset and progression of leaf senescence imply a central role for transcription factors. While many transcription factors are themselves up- or down-regulated during senescence, the bZIP transcription factor G-box-binding factor...

Coupling Mediated Coherent Control of Localized Surface Plasmon Polaritons.

Nano letters

Zeuner F, Muldarisnur M, Hildebrandt A, Förstner J, Zentgraf T.
PMID: 25978694
Nano Lett. 2015 Jun 10;15(6):4189-93. doi: 10.1021/acs.nanolett.5b01381. Epub 2015 May 20.

We investigate the phase-dependent excitation of localized surface plasmon polaritons in coupled nanorods by using nonlinear spectroscopy. Our design of a coupled three-nanorod structure allows independent excitation with cross-polarized light. Here, we show that the excitation of a particular...

Ultrathin Nonlinear Metasurface for Optical Image Encoding.

Nano letters

Walter F, Li G, Meier C, Zhang S, Zentgraf T.
PMID: 28409930
Nano Lett. 2017 May 10;17(5):3171-3175. doi: 10.1021/acs.nanolett.7b00676. Epub 2017 Apr 18.

Security of optical information is of great importance in modern society. Many cryptography techniques based on classical and quantum optics have been widely explored in the linear optical regime. Nonlinear optical encryption in which encoding and decoding involve nonlinear...

Tunable wave plate based on active plasmonic metasurfaces.

Optics express

Li T, Huang L, Liu J, Wang Y, Zentgraf T.
PMID: 28241626
Opt Express. 2017 Feb 20;25(4):4216-4226. doi: 10.1364/OE.25.004216.

Polarization conversion is highly desired for numerous valuable applications such as remote detection and high-precision measurement. It is conventionally achieved through utilizing bulky birefringent crystals or by delicate tailored anisotropy materials. However, such schemes are not compatible with both...

Spin and wavelength multiplexed nonlinear metasurface holography.

Nature communications

Ye W, Zeuner F, Li X, Reineke B, He S, Qiu CW, Liu J, Wang Y, Zhang S, Zentgraf T.
PMID: 27306147
Nat Commun. 2016 Jun 16;7:11930. doi: 10.1038/ncomms11930.

Metasurfaces, as the ultrathin version of metamaterials, have caught growing attention due to their superior capability in controlling the phase, amplitude and polarization states of light. Among various types of metasurfaces, geometric metasurface that encodes a geometric or Pancharatnam-Berry...

Transformational plasmon optics.

Nano letters

Liu Y, Zentgraf T, Bartal G, Zhang X.
PMID: 20465268
Nano Lett. 2010 Jun 09;10(6):1991-7. doi: 10.1021/nl1008019.

We propose and demonstrate efficiently molding surface plasmon polaritons (SPPs) based on transformation optics. SPPs are surface modes of electromagnetic waves tightly bound at metal-dielectric interfaces, which allow us to scale optics beyond the diffraction limit. Taking advantage of...

The influence of expertise on brain activation of the action observation network during anticipation of tennis and volleyball serves.

Frontiers in human neuroscience

Balser N, Lorey B, Pilgramm S, Naumann T, Kindermann S, Stark R, Zentgraf K, Williams AM, Munzert J.
PMID: 25136305
Front Hum Neurosci. 2014 Aug 01;8:568. doi: 10.3389/fnhum.2014.00568. eCollection 2014.

In many daily activities, and especially in sport, it is necessary to predict the effects of others' actions in order to initiate appropriate responses. Recently, researchers have suggested that the action-observation network (AON) including the cerebellum plays an essential...

Imaging the rainbow.

Nature nanotechnology

Zentgraf T.
PMID: 29379202
Nat Nanotechnol. 2018 Mar;13(3):179-180. doi: 10.1038/s41565-018-0062-x.

No abstract available.

Manipulation of vector beam polarization with geometric metasurfaces.

Optics express

Guo Q, Schlickriede C, Wang D, Liu H, Xiang Y, Zentgraf T, Zhang S.
PMID: 28789015
Opt Express. 2017 Jun 26;25(13):14300-14307. doi: 10.1364/OE.25.014300.

Describing a class of beams with space-variant polarization, vector beams find many applications in both classical and quantum optics. However, simultaneous manipulation of its space-dependent polarization states is still a challenge with a single optical element. Here we demonstrate...

Beam switching and bifocal zoom lensing using active plasmonic metasurfaces.

Light, science & applications

Yin X, Steinle T, Huang L, Taubner T, Wuttig M, Zentgraf T, Giessen H.
PMID: 30167272
Light Sci Appl. 2017 Jul 28;6(7):e17016. doi: 10.1038/lsa.2017.16. eCollection 2017 Jul.

Compact nanophotonic elements exhibiting adaptable properties are essential components for the miniaturization of powerful optical technologies such as adaptive optics and spatial light modulators. While the larger counterparts typically rely on mechanical actuation, this can be undesirable in some...

Silicon Metasurfaces for Third Harmonic Geometric Phase Manipulation and Multiplexed Holography.

Nano letters

Reineke B, Sain B, Zhao R, Carletti L, Liu B, Huang L, De Angelis C, Zentgraf T.
PMID: 31405278
Nano Lett. 2019 Sep 11;19(9):6585-6591. doi: 10.1021/acs.nanolett.9b02844. Epub 2019 Aug 15.

Nonlinear wavefront control is a crucial requirement in realizing nonlinear optical applications with metasurfaces. Numerous aspects of nonlinear frequency conversion and wavefront control have been demonstrated for plasmonic metasurfaces. However, several disadvantages limit their applicability in nonlinear nanophotonics, including...

Showing 1 to 12 of 100 entries