Narrow-bandgap titanium sesquioxide with resonant metasurfaces for enhanced infrared absorption DOI Creative Commons
Viktoriia E. Babicheva, Evgeniya H. Lock, Heungsoo Kim

et al.

Applied Physics Letters, Journal Year: 2024, Volume and Issue: 125(26)

Published: Dec. 23, 2024

We report on the structural, chemical, and optical properties of titanium sesquioxide Ti2O3 thin films single-crystal sapphire substrates by pulsed laser deposition. The film exhibits light absorption around 25%–45% in wavelength range 2–10 μm. Here, we design an infrared photodetector structure based Ti2O3, enhanced a resonant metasurface, to improve its mid-wave long-wave windows. show that window (wavelength 3–5 μm) active layer can be significantly from 30%–40% more than 80% utilizing metasurface made low-loss silicon, facilitating efficient scattering layer. Furthermore, compare absorptance with conventional semiconductors, such as InSb, InAs, HgCdTe, operating μm demonstrate is higher these semiconductors due narrow-bandgap characteristics Ti2O3. proposed designs used tailor wavelengths photodetection across near- mid-infrared ranges.

Language: Английский

Mie-Resonant Metaphotonics DOI
Viktoriia E. Babicheva, Andrey B. Evlyukhin

Advances in Optics and Photonics, Journal Year: 2024, Volume and Issue: 16(3), P. 539 - 539

Published: June 4, 2024

Mie-resonant metaphotonics is a rapidly developing field that employs the physics of Mie resonances to control light at nanoscale. are excited in high-refractive-index transparent nanoparticles and voids created dielectric media, they can be used achieve wide range optical effects, including enhanced light–matter interaction, nonlinear topological photonics. Here, we review recent advances metaphotonics, with focus on their applications metasurfaces. Through comprehensive multipolar analysis, demonstrate complex interplay electric magnetic multipoles govern interaction light. Recent have unveiled diverse spectrum scattering phenomena achieved within precisely engineered structures. Within this framework, underlying mechanics first second Kerker conditions describe intricate mechanisms guiding these nanostructures’ light-scattering properties. Moreover, cover intriguing such as anapole bound or quasi-bound states continuum. Of profound interest numerous practical result from revelations. Ultrafast processes, emergence nanolasers, advancements magneto-optic devices represent just fraction transformative applications.

Language: Английский

Citations

18
Enhancing MXene Multipolar Resonances Through Metasurface Lattice Engineering DOI Creative Commons
Vahid Karimi,

Dominic Bosomtwi,

Li Liu

et al.

Nano Select, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

ABSTRACT When arranged in a metasurface, the collective enhancement of field interactions within scattering elements enables precise control over incident light phase and amplitude. In this work, we analyze multipolar resonances metasurfaces that arise from spatially extended nature electromagnetic these structures, with particular emphasis on MXene metasurfaces. This leads to unique tunable resonance behaviors reach beyond simple dipolar approximations, thus enabling advanced manipulation at subwavelength scales. We also explore scatterers made different materials, categorizing them into lossy including transition metal dichalcogenides conventional metals, high‐refractive‐index such as silicon. observe excitation across visible‐ infrared‐wavelength spectra demonstrate their through design metasurface. show periodic lattice arrays support strong localized response individual nanoresonators one can by engineering metasurface distribution.

Language: Английский

Citations

0
Metasurfaces with Multipolar Resonances and Enhanced Light–Matter Interaction DOI Creative Commons
Evan Modak Arup,

Li Liu,

Haben Mekonnen

et al.

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(7), P. 477 - 477

Published: March 21, 2025

Metasurfaces, composed of engineered nanoantennas, enable unprecedented control over electromagnetic waves by leveraging multipolar resonances to tailor light–matter interactions. This review explores key physical mechanisms that govern their optical properties, including the role in shaping metasurface responses, emergence bound states continuum (BICs) support high-quality factor modes, and Purcell effect, which enhances spontaneous emission rates at nanoscale. These effects collectively underpin design advanced photonic devices with tailored spectral, angular, polarization-dependent properties. discusses recent advances metasurfaces applications based on them, highlighting research employs full-wave numerical simulations, analytical semi-analytic techniques, decomposition, nanofabrication, experimental characterization explore interplay resonances, quasi-bound states, enhanced A particular focus is given metasurface-enhanced photodetectors, where structured nanoantennas improve light absorption, spectral selectivity, quantum efficiency. By integrating conventional photodetector architectures, it possible enhance responsivity, engineer photocarrier generation rates, even functionalities such as polarization-sensitive detection. The between BICs, provides a unified framework for designing next-generation optoelectronic devices. consolidates progress these areas, emphasizing potential metasurface-based approaches high-performance sensing, imaging, energy-harvesting applications.

Language: Английский

Citations

0
Enhanced light confinement in nonlocal resonant metasurfaces with weak multipolar scatterers DOI Creative Commons

Amanda Romero,

Viktoriia E. Babicheva

Journal of Applied Physics, Journal Year: 2024, Volume and Issue: 136(8)

Published: Aug. 27, 2024

Stronger light confinement can be enabled by nanoantennas in the nanostructure and result efficient control of directionality scattering. We report on an observation well-pronounced multipolar resonances from nickel originating collective effects. show that coupling modes weak scatterers substantially enhance electric dipole quadrupole resonances. also demonstrate generalized lattice Kerker effect this nanoantenna array. Resonant excitations within arrays significantly phenomena such as magneto-optical effects, indicating promising potential for advanced applications field nanophotonics sensing.

Language: Английский

Citations

2
Narrow-bandgap titanium sesquioxide with resonant metasurfaces for enhanced infrared absorption DOI Creative Commons
Viktoriia E. Babicheva, Evgeniya H. Lock, Heungsoo Kim

et al.

Applied Physics Letters, Journal Year: 2024, Volume and Issue: 125(26)

Published: Dec. 23, 2024

We report on the structural, chemical, and optical properties of titanium sesquioxide Ti2O3 thin films single-crystal sapphire substrates by pulsed laser deposition. The film exhibits light absorption around 25%–45% in wavelength range 2–10 μm. Here, we design an infrared photodetector structure based Ti2O3, enhanced a resonant metasurface, to improve its mid-wave long-wave windows. show that window (wavelength 3–5 μm) active layer can be significantly from 30%–40% more than 80% utilizing metasurface made low-loss silicon, facilitating efficient scattering layer. Furthermore, compare absorptance with conventional semiconductors, such as InSb, InAs, HgCdTe, operating μm demonstrate is higher these semiconductors due narrow-bandgap characteristics Ti2O3. proposed designs used tailor wavelengths photodetection across near- mid-infrared ranges.

Language: Английский

Citations

1