Non-Layered Gold-Silicon and All-Silicon Frequency-Selective Metasurfaces for Potential Mid-Infrared Sensing Applications

We report simulations on the spectral behavior of non-layered gold-silicon and all-silicon frequency-selective metasurfaces in an asymmetric element configuration in the mid-infrared spectral window of 5–5.8 μm. The non-layered layout is experimentally feasible due to recent technological advances such as nano-imprint and nano-stencil lithography, and the spectral window was chosen due to the multitude of applications in sensing and imaging. The architecture exhibits significant resonance in the window of interest as well as extended tunability by means of variation of cell element sizes and relative coordinates. The results indicate that the proposed metasurface architecture is a viable candidate for mid-infrared absorbers, sensors and imaging systems.

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GeSn-based Multiple-Quantum-Well Photodetectors for Mid-Infrared Sensing Applications

IEEE Transactions on NanoBioscience ◽

10.1109/tnb.2021.3136571 ◽

2021 ◽

pp. 1-1

Author(s):

Harshvardhan Kumar ◽

Ankit Kumar Pandey

Keyword(s):

Quantum Well ◽

Multiple Quantum Well ◽

Multiple Quantum ◽

Mid Infrared ◽

Infrared Sensing ◽

Sensing Applications

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Near-Field Mapping of Localized Plasmon Resonances in Metal-Free, Nanomembrane Graphene for Mid-Infrared Sensing Applications

ACS Applied Nano Materials ◽

10.1021/acsanm.8b01631 ◽

2018 ◽

Vol 1 (11) ◽

pp. 6454-6462 ◽

Cited By ~ 4

Author(s):

Mai Desouky ◽

M. R. Anisur ◽

Maria Alba ◽

R. K. Singh Raman ◽

Mohamed. A. Swillam ◽

...

Keyword(s):

Near Field ◽

Mid Infrared ◽

Field Mapping ◽

Metal Free ◽

Infrared Sensing ◽

Sensing Applications ◽

Plasmon Resonances ◽

Localized Plasmon ◽

Localized Plasmon Resonances

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Ge-on-Si Photonics for Mid-infrared Sensing Applications

MRS Advances ◽

10.1557/adv.2016.391 ◽

2016 ◽

Vol 1 (48) ◽

pp. 3269-3279

Author(s):

K. Gallacher ◽

L. Baldassarre ◽

A. Samarelli ◽

R. W. Millar ◽

A. Ballabio ◽

...

Keyword(s):

Quantum Wells ◽

Hot Spots ◽

Atmospheric Transmission ◽

Mid Infrared ◽

Infrared Sensing ◽

Quantum Well Infrared Photodetectors ◽

Si Photonics ◽

Sensing Applications ◽

Resonant Modes ◽

Transmission Window

ABSTRACTThere is significant interest to develop cheap CMOS compatible sensors that operate in the mid-infrared (MIR). To meet these requirements, Ge-on-Si is proving to be an exciting platform. There is the potential to realize waveguide integrated quantum well infrared photodetectors (QWIPs) based on Ge quantum wells (QWs). Intersubband absorption from p-Ge QWs has been demonstrated in the important atmospheric transmission window of 8-13 μm. An alternative strategy for sensing in the MIR is demonstrated through highly n-type doped Ge plasmonic antennas. These antennas demonstrate vibrational sensing of polydimethylsiloxane (PDMS) spin coated layers at 12.5 μm wavelength. These demonstrate enhanced sensing capabilities due to the localized hot spots of the antenna resonant modes.

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Suspended Microracetrack Resonator with Lateral Sub-wavelength-Grating Metamaterial Cladding for Mid-infrared Sensing Applications

ITM Web of Conferences ◽

10.1051/itmconf/20181702005 ◽

2018 ◽

Vol 17 ◽

pp. 02005 ◽

Cited By ~ 1

Author(s):

Zecen Zhang ◽

Geok Ing Ng ◽

Ting Hu ◽

Haodong Qiu ◽

Xin Guo ◽

...

Keyword(s):

Chemical Sensing ◽

Extinction Ratio ◽

Silicon On Insulator ◽

Propagation Loss ◽

Index Method ◽

Mid Infrared ◽

Infrared Sensing ◽

Sensing Applications ◽

The One ◽

Sub Wavelength

A one-time etching suspended microracetrack resonator with lateral sub-wavelength-grating (SWG) metamaterial cladding is theoretically and experimentally demonstrated on commercial 340 nm-thick-top-silicon silicon-on-insulator (SOI) platform for mid-infrared (MIR) bio-chemical sensing applications. The suspended structure can offer a larger exposed area of waveguides with the testing chemicals as well as a decent sensitivity. And the one-time etching process also eases the fabrication. The suspended waveguide is optimized with a balance between propagation loss and the sensitivity. The suspended microracetrack resonator is experimentally measured at 2 μm wavelength and well fitted with an extinction ratio (ER) of 12.3 dB and a full-width-at-half-maximum (FWHM) of 0.12 nm, which corresponds to a quality factor (Q factor) of 16600. With the equivalent refractive index method and a specially developed numerical model, the expected sensitivities of fundamental TE and TM mode were calculated as 58 nm/RIU and 303 nm/RIU respectively. This one-time etching suspended microracetrack resonator shows great potential in MIR optical bio-chemical sensing applications.

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