An invisible metal–semiconductor photodetector

Fan, Pengyu; Chettiar, Uday K.; Cao, Linyou; Afshinmanesh, Farzaneh; Engheta, Nader; Brongersma, Mark L.

doi:10.1038/nphoton.2012.108

Cited by 222 publications

(198 citation statements)

References 26 publications

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“…As shown in Fig. 2a, the Ag cavity markedly alters the optical response of the device in the FW spectral range 26 . A strong resonant peak for the Ag-coated NW (d ¼ 230 nm) at B950 nm is observed, whereas there is no such feature in the same spectral range for the bare NW ( Supplementary Fig.…”

Section: Resultsmentioning

confidence: 92%

“…Here, we report a hybrid metal-semiconductor nanostructure 23,26,27 , that is, a Ag-coated CdS NW, in which CdS has a large nonlinear coefficient of B78 pm V À 1 (42 times larger than lithium niobate) 28 , to engineer highly confined lowest-order WGM, which is used to facilitate tunable, directional and efficient SHG output. We chose the diameter of CdS NWs in the 4150-nm range in order to optimize the SHG signal output while also optimizing their waveguiding properties to enable their applications in nanophotonic circuitry.…”

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confidence: 99%

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Enhanced second-harmonic generation from metal-integrated semiconductor nanowires via highly confined whispering gallery modes

et al. 2014

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Coherent and tunable nanoscale light sources utilizing optical nonlinearities are required for applications ranging from imaging and bio-sensing to on-chip all-optical signal processing. However, owing to their small sizes, the efficiency of nanostructures even with high nonlinear coefficients is poor, therefore requiring very high excitation energies. Although surface-plasmon resonances of metal nanostructures can enhance surface nonlinear processes such as second-harmonic generation, they still suffer from low conversion efficiencies owing to their intrinsically low nonlinear coefficients. Here we show highly enhanced and directional second-harmonic generation from individual CdS nanowires integrated with silver nanocavities (41,000 times higher external efficiency compared with bare CdS), in which the lowest-order whispering gallery mode is engineered to concentrate light in the nonlinear material while minimizing Ohmic losses. The directional nonlinear signal is redirected into another waveguide, which is then utilized to configure an optical router that can potentially serve as a tunable coherent light source to enable on-chip signal processing for integrated nanophotonic systems.

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Section: Resultsmentioning

confidence: 92%

mentioning

confidence: 99%

Enhanced second-harmonic generation from metal-integrated semiconductor nanowires via highly confined whispering gallery modes

et al. 2014

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“…The concept of invisible sensors has been recently validated experimentally at optical frequencies [286]. The sensor was made of a semiconductor rod connected to two electrodes.…”

Section: Cloaking a Sensormentioning

confidence: 99%

CLOAKING AND INVISIBILITY: A REVIEW (Invited Review)

Fleury¹,

Alù²

2014

PIER

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Abstract-Invisibility has been a tantalizing concept for mankind over several centuries. With recent developments in metamaterial science and nanotechnology, the possibility of cloaking objects to incoming electromagnetic radiation has been escaping the realm of science fiction to become a technological reality. In this article, we review the state-of-the-art in the science of invisibility for electromagnetic waves, and examine the different available technical concepts and experimental investigations, focusing on the underlying physics and the basic scientific concepts. We discuss the available cloaking methods, including transformation optics, plasmonic and mantle cloaking, transmission-line networks, parallel-plate cloaking, anomalous resonance methods, hybrid methods and active schemes, and give our perspective on the subject and its future. We also draw a parallel with cloaking research for acoustic and elastodynamic waves, liquid waves, matter waves and thermal flux, demonstrating how ideas initiated in the field of electromagnetism have been able to open groundbreaking venues in a variety of other scientific fields. Finally, applications of cloaking to noninvasive sensing are discussed and reviewed.

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“…As an alternative approach to invisibility cloaking, the recent exciting development of plasmonic cloaking, [22][23][24] which is based on scattering cancellation, deserves another special review, and thus, is not covered here. The recent, ingenious proposal of 'cloaking at a distance' 25 utilizing media with a negative refractive index has been reviewed in detail in Ref.…”

Section: Material/functionmentioning

confidence: 99%

Electrodynamics of transformation-based invisibility cloaking

Zhang

2012

Light Sci Appl

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An invisible metal–semiconductor photodetector

Cited by 222 publications

References 26 publications

Enhanced second-harmonic generation from metal-integrated semiconductor nanowires via highly confined whispering gallery modes

Enhanced second-harmonic generation from metal-integrated semiconductor nanowires via highly confined whispering gallery modes

CLOAKING AND INVISIBILITY: A REVIEW (Invited Review)

Electrodynamics of transformation-based invisibility cloaking

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