Resolving molecule-specific information in dynamic lipid membrane processes with multi-resonant infrared metasurfaces

177

Tunable metamaterial devices have experienced explosive growth in the past decades, driving the traditional electromagnetic (EM) devices to evolve into diversified functionalities by manipulating EM properties such as amplitude, frequency, phase, polarization, and propagation direction. However, one of the bottlenecks of these rapidly developed metamaterials technologies is limited tunability caused by the intrinsic frequency‐dependent property of exotic tunable material. To overcome such limitation, the microelectromechanical system (MEMS) enabling micro/nanoscale manipulation is developed to actively control “meta‐atom” in terahertz and infrared region, which brings frequency‐scalable tunability and complementary metal‐oxide‐semiconductor‐compatible functional meta‐devices. Beyond tunability, novel chemical sensing platforms of molecular identification and dynamic monitoring of the biochemical process can be achieved by integrating micro/nanofluidics channels with metamaterial resonators. Additionally, incorporating metamaterial absorbers with MEMS resonators brings another research interest in MEMS zero‐power devices and radiation sensors. Furthermore, moving from 2D metasurfaces to 3D metamaterials, enhanced EM properties like novel resonance mode, giant chirality, and 3D manipulation reinforce the application in biochemical and physical sensors as well as functional meta‐devices, paving the way to realize multi‐functional sensing and signal processing on a hybrid smart‐sensor microsystem for booming healthcare, environmental monitoring, and the Internet of Things applications.

Section: Metamaterials In Chemical Sensing Applicationsmentioning

confidence: 99%

Leveraging of MEMS Technologies for Optical Metamaterials Applications

Ren

Chang

et al. 2019

177

“…[29] To enhance the coupling efficiency between locally enhanced IR light and target molecules, various plasmonic metamaterials and nanostructures, including split ring resonators (SRRs), [30,31] nanorods, [29,35,40] nanogaps, [39] and nanoshells, [22,25,28] have been utilized to form resonant nanostructures that match the vibrational modes of the target molecules. [29] To enhance the coupling efficiency between locally enhanced IR light and target molecules, various plasmonic metamaterials and nanostructures, including split ring resonators (SRRs), [30,31] nanorods, [29,35,40] nanogaps, [39] and nanoshells, [22,25,28] have been utilized to form resonant nanostructures that match the vibrational modes of the target molecules.…”

Section: Surface Enhanced Infrared Absorption (Seira) Spectroscopymentioning

confidence: 99%

“…[49,50] In Figure 3a, Fano-resonant asymmetric metamaterials show strong near-field enhancement at the gap as well as sharp spectral features, operating in the mid-IR range. 2020, 8,1900662 2,4,8,16,32,40,50, and 60 Å. Optical Mater.…”

Section: Next Generation Of Mid-ir Absorption Spectroscopiesmentioning

confidence: 99%

“…[17][18][19][20][21][22] In addition to the best-known topic of surface enhanced Raman scattering, [18,[23][24][25] surface enhanced infrared absorption (SEIRA) spectroscopy can also be performed by direct enhancement of vibrational modes of molecules in the infrared spectrum. [35][36][37][38][39][40] This section covers from the conventional SEIRA spectroscopies to new advanced mid-IR absorption spectroscopy techniques. Recently, plasmonic metamaterials and nanostructures, [33,34] which support collective resonances with a strong local field in the mid-IR range, have been suggested as a tool for molecular detection, enhancing absorption signals of molecules even more than the conventional SEIRA spectroscopy techniques.…”

mentioning

confidence: 99%

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Terahertz Biochemical Molecule‐Specific Sensors

Seo

Park

2019

123

The terahertz (THz) spectrum is the focus of basic research in solid‐state physics, chemistry, and materials science as well as applications in next‐generation communications, far‐infrared bolometer, bio/chemical‐sensing, and medical imaging. This wavelength range is at the intersection between photonics and electronics, presenting tremendous opportunities to boost fundamental light–matter interactions enabled by plasmonic nanostructures, metamaterials, and inherent molecular vibrational modes, which occur on time scales of tens of femtoseconds to picoseconds. Recently, engineered metamaterials have presented unique platforms for sensing applications due to their ability to boost such light–matter interactions on the nanoscale and to their spectral selectivity in a wide range from the mid‐infrared to the THz region. Their resonant response can be tuned to that of the intra‐ and intermolecular vibrational modes of target bio/chemical molecules. The emerging fields of highly sensitive and selective mid‐infrared and THz spectroscopies based on metamaterials and plasmonic nanostructures are reviewed. Furthermore, practical applications of these next generation spectroscopic sensors are also discussed, where the sensor platforms will lead to a great impact in the advancement of ultrasmall‐quantity detection of explosives, nondestructive inspection of hazardous materials, food safety, and conformational dynamics of biomolecules in their aqueous environment.

“…The strong light–matter interactions provide chances to manipulate light with both electronic and photonic means . The excellent optical responses of polaritons in THz and IR frequency ranges also enable many applications in bio‐sensing and chemical identification . One particular focus in this field is to search for better polaritonic systems with low optical loss, high coupling rate, and ultrafast tunability …”

Section: Introductionmentioning

confidence: 99%

Nanoimaging and Nanospectroscopy of Polaritons with Time Resolved s‐SNOM

Yao

et al. 2019

The development of electronics and photonics is entering a new era of ultrahigh speed sensing, data processing, and telecommunication. The carrier frequencies of the next‐generation electronic devices inevitably extend beyond radio frequencies, marching toward the nominally photonics‐dominated territories, e.g., terahertz and beyond. As a result, electronic and photonic techniques naturally merge and seek common ground. At the forefront of this technical trend is the field of polaritonics, where polaritons are half‐light, half‐matter quasiparticles that carry the properties of both “bare” photons and “bare” dipole‐carrying excitations. The Janus‐faced nature of polaritons renders the unique capability of operando control using photoexcitation or applied electric field. Here, state‐of‐the‐art ultrafast polaritonic phenomena probed by scattering‐type scanning near‐field optical microscope (s‐SNOM) techniques is reviewed. The ultrafast dynamical control and loss‐reduction of the polariton propagation are discussed with special emphasis on the creation and probing of the tip or edge induced plasmon– and phonon–polaritons in low‐dimensional systems. The detailed technical aspects of s‐SNOM and its possible future development are also presented.