Plasmonic mid-infrared third harmonic generation in germanium nanoantennas

Fischer, Marco; Riede, Aaron; Gallacher, Kevin; Frigerio, Jacopo; Pellegrini, Giovanni; Ortolani, Michele; Paul, Douglas J.; Isella, Giovanni; Leitenstorfer, Alfred; Biagioni, Paolo; Brida, Daniele

doi:10.1038/s41377-018-0108-8

Cited by 51 publications

(26 citation statements)

References 36 publications

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“…In 2018, Autore et al took advantage of the large‐quality factors of phonon polaritons in h‐BN nanoribbons to realize molecular vibrational spectroscopy. In addition, subdiffractional nanostructures, which display high confinement of light, can also enhance nonlinear optical effects within these structures …”

Section: Far‐field Optical Methodsmentioning

confidence: 99%

Probing Polaritons in 2D Materials

Luo

Guo

et al. 2020

Advanced Optical Materials

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Polaritons in 2D materials exhibit extensive optical phenomena, such as an ultrahigh field confinement and tunability and, thus, have been attracting increasing attentions. Many different methods have been developed to characterize and manipulate polaritons, which in turn has promoted a steady booming of this field. Here, the significant progress made in probing polaritons in 2D materials based on the characterization method, i.e., optical far‐field, optical near‐field, and (opto)electronic methods is reviewed. Perspectives on the potential development and applications of these methods are also discussed.

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Section: Far‐field Optical Methodsmentioning

confidence: 99%

Probing Polaritons in 2D Materials

Luo

Guo

et al. 2020

Advanced Optical Materials

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“…Recently, great scientific effort is devoted towards establishing nanostructures suitable for in-vivo enhanced fluorescence monitoring [4] and surface-enhanced pump-probe schemes to deliver molecular bond information with ultimate sensitivity [7]. Moreover, antennas based on highly-doped semiconductors (HDSCs) have been proposed for third harmonic generation in the mid-infrared [8] since they offer a tunable bulk plasma frequency through doping and high thirdorder susceptibility. This makes them promising candidates for surface-enhanced ultrafast pump-probe vibrational spectroscopy, providing previously inaccessible information about the target molecule and its biological environment.…”

Section: Statusmentioning

confidence: 99%

Roadmap on bio-nano-photonics

Herkert

Slesiona

Recchia

et al. 2021

J. Opt.

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In the quest to decipher the chain of life from molecules to cells, the biological and biophysical questions being asked increasingly demand techniques that are capable of identifying specific biomolecules in their native environment, and can measure biomolecular interactions quantitatively, at the smallest possible scale in space and time, without perturbing the system under observation. The interaction of light with biomolecules offers a wealth of phenomena and tools that can be exploited to drive this progress. This Roadmap is written collectively by prominent researchers and encompasses selected aspects of bio-nano-photonics, spanning from

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“…The Ge-on-Si waveguide platform is as an excellent candidate since it could provide low loss guiding from 2 to 15 μm wavelength [3]. This platform has already demonstrated several sensing components in the MIR such as light emitters [4], plasmonic antennas [5], intersubband photodetectors [6] and third harmonic generation [7].…”

Section: Introductionmentioning

confidence: 99%

Ge-on-Si Mid-Infrared Waveguide Platform for Molecular Fingerprint Sensing

Gallacher

Millar

Griškevičiūtė

et al. 2020

2020 22nd International Conference on Transparent Optical Networks (ICTON)

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The mid-infrared spectral region is key to several large market applications such as security, healthcare and environmental monitoring. This is due to how chemical compounds can be detected from unique vibrational modes that absorb in the molecular 'fingerprint' region (6.7-20 µm wavelength). There is significant interest in realizing cheaper and smaller spectrometers based on waveguide integrated photonics. Here we demonstrate Geon-Si waveguides operating up to 11 µm wavelength with low propagation loss (~ 1 dB/cm). The performance of the waveguides is then demonstrated by measuring thin films that are used to calibrate the modal overlap for molecular sensing. Lastly, an ultra-broadband Ge-on-Si waveguide polarization rotator is presented. The fabricated polarization rotator devices demonstrate a polarization extinction ratio of ≥ 15 dB over a 2 µm bandwidth (9-11 µm wavelength) with an average insertion loss < 1 dB.

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Plasmonic mid-infrared third harmonic generation in germanium nanoantennas

Cited by 51 publications

References 36 publications

Probing Polaritons in 2D Materials

Probing Polaritons in 2D Materials

Roadmap on bio-nano-photonics

Ge-on-Si Mid-Infrared Waveguide Platform for Molecular Fingerprint Sensing

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