Design and fabrication of broadband guided-mode resonant reflectors in TE polarization

Khaleque, Tanzina; Uddin, Mohammad Jalal; Magnusson, Robert

doi:10.1364/oe.22.012349

Cited by 17 publications

(12 citation statements)

References 14 publications

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“…RWGs can also be utilized to make efficient wideband reflectors using a periodic array of high‐index scatterers on a low index layer (Figure b,c) . The bandwidth and the efficiency of the broadband reflectors with partially etched RWGs can be tuned with the grating depth, fill factor, the thickness of the homogeneous layer, and with tapered sidewalls . Efficient wideband reflectors with steep sidewalls can be obtained by operating RWGs at the proximity of the Rayleigh angle .…”

Section: Effects Associated With Rwgsmentioning

confidence: 99%

“…tapered sidewalls. [154][155][156] Efficient wideband reflectors with steep sidewalls can be obtained by operating RWGs at the proximity of the Rayleigh angle. [157] When an RWG resonates at an angle corresponding to the Rayleigh anomaly, the zeroth-order reflection energy is almost completely transferred into a first-order transmitted mode with a sharp transition, as shown in Figure 9.…”

Section: Narrowband and Broadband Filtersmentioning

confidence: 99%

See 1 more Smart Citation

Recent Advances in Resonant Waveguide Gratings

Quaranta

Basset

Martin

et al. 2018

Laser & Photonics Reviews

321

199

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Resonant waveguide gratings (RWGs), also known as guided mode resonant (GMR) gratings or waveguide‐mode resonant gratings, are dielectric structures where these resonant diffractive elements benefit from lateral leaky guided modes from UV to microwave frequencies in many different configurations. A broad range of optical effects are obtained using RWGs such as waveguide coupling, filtering, focusing, field enhancement and nonlinear effects, magneto‐optical Kerr effect, or electromagnetically induced transparency. Thanks to their high degree of optical tunability (wavelength, phase, polarization, intensity) and the variety of fabrication processes and materials available, RWGs have been implemented in a broad scope of applications in research and industry: refractive index and fluorescence biosensors, solar cells and photodetectors, signal processing, polarizers and wave plates, spectrometers, active tunable filters, mirrors for lasers and optical security features. The aim of this review is to discuss the latest developments in the field including numerical modeling, manufacturing, the physics, and applications of RWGs. Scientists and engineers interested in using RWGs for their application will also find links to the standard tools and references in modeling and fabrication according to their needs.

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Section: Effects Associated With Rwgsmentioning

confidence: 99%

Section: Narrowband and Broadband Filtersmentioning

confidence: 99%

Recent Advances in Resonant Waveguide Gratings

Quaranta

Basset

Martin

et al. 2018

Laser & Photonics Reviews

321

199

View full text Add to dashboard Cite

show abstract

“…In addition to providing means for novel optical elements, such as wavelength selective mirrors, polarizers [1], waveplates [2], tunable filters [3][4][5][6][7] and ultrabroadband mirrors [8], such resonant gratings have increasingly found their way into a myriad of different sensing applications, such as chemical and environmental sensing [9,10], label-free biosensing [11][12][13], cancer screening [14,15], photonic crystal enhanced microscopy [16] and three dimensional imaging [17]. These resonant gratings, referred to here as photonic crystal slabs (PCS) [18], but also known as guided mode resonance filters or reflectors [1,19] and photonic crystal resonant reflectors [20] in the literature, are essentially slab waveguides in which the high refractive index waveguide core is in some way periodically modulated, such as by refractive index or thickness, and surrounded by cladding media of lower refractive indices [1,18]. The periodically modulated waveguide core is able to sustain quasi-guided or leaky waveguide modes, which couple to the far field [21].…”

Section: Introductionmentioning

confidence: 99%

All-polymer photonic crystal slab sensor

Hermannsson¹,

Sørensen²,

Vannahme³

et al. 2015

Opt. Express

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Abstract:An all-polymer photonic crystal slab sensor is presented, and shown to exhibit narrow resonant reflection with a FWHM of less than 1 nm and a sensitivity of 31 nm/RIU when sensing media with refractive indices around that of water. This results in a detection limit of 4.5 × 10 −6 RIU when measured in conjunction with a spectrometer of 12 pm/pixel resolution. The device is a two-layer structure, composed of a low refractive index polymer with a periodically modulated surface height, covered with a smooth upper-surface high refractive index inorganic-organic hybrid polymer modified with ZrO 2 -based nanoparticles. Furthermore, it is fabricated using inexpensive vacuum-less techniques involving only UV nanoreplication and polymer spin-casting, and is thus well suited for single-use biological and refractive index sensing applications.

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“…For most practical applications, resonances with strong intensity and narrow linewidth are desirable. [8,[21][22][23][24][25][26][27][28][29][30][31] The GMR filter primarily comprises of a diffractive grating and an in-plane waveguide. However, most of the resonances are constrained by the trade-off between resonance intensity and linewidth.…”

mentioning

confidence: 99%

“…[35] The 2D array of silicon cuboid resonators acts as a grating and more importantly, the silicon metasurface also acts as a homogeneous core layer that support slab waveguide modes, governed by total internal reflection (TIR) [36] (see Supporting Information for details). The combination of the waveguiding criteria (i.e., TIR) and the grating equation provides the critical condition for the realization of GMR, which is given by: n sin [8,[21][22][23][24][25][26][27][28][29][30][31][32][33]36] where Λ is the lattice period, λ is wavelength and the corresponding frequency is given by f = c/λ . The modes that lie above the light line are radiative in nature, while those lying below are guided within the slab waveguide.…”

mentioning

confidence: 99%

Guided‐Mode Resonances in All‐Dielectric Terahertz Metasurfaces

Han

Rybin

Pitchappa

et al. 2019

Advanced Optical Materials

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The important parameters that describe a resonance feature are its intensity and spectral linewidth. For most practical applications, resonances with strong intensity and narrow linewidth are desirable. Higher resonance intensity provides better signal to noise ratio, while narrower linewidth signifies larger field confinement. However, most of the resonances are constrained by the trade-off between resonance intensity and linewidth. [20] This limits the possibility of independent tailoring of resonance features at will. On the contrary, guided mode resonance (GMR) can provide arbitrary resonance intensity and linewidth through geometrical design and selection of materials. [8] Due to this versatile nature of GMRs, they have found wide range of applications, including extremely high-Q filters, ultrabroadband reflectors, wavelength selective polarizers, and beam splitters. [8,[21][22][23][24][25][26][27][28][29][30][31] The GMR filter primarily comprises of a diffractive grating and an in-plane waveguide. The grating diffracts the incident light and couples it into the waveguide, which propagates as a guided mode. However, this guided mode is designed to be leaky, which then interferes with the free-space propagating electromagnetic wave to give rise to the GMRs. Through the selection of material, grating design, dielectric layer thickness, and angle of incidence, GMRs can provide a wide range of spectral features. Currently, the exploration of GMRs is limited to optical and radio frequency regions of the electromagnetic spectrum. However, terahertz (THz) technologies are attracting a lot of attention to cater to the challenges of meeting ever-increasing demand for highspeed wireless communications. [32] THz GMR devices could play a crucial role in communication applications due to its capability for constructing high-Q filters, polarization selective beam splitters, differentiators, integrators, and wavelength division (de)multiplexers. [8] Earlier reports on THz GMRs were realized through 1D grating elements on quartz substrate [33] and periodic metallic patterns on cyclo-olefin substrates. [34] Here, we experimentally demonstrate silicon-based all-dielectric metasurfaces that support GMRs at THz frequencies.The 2D metasurface, building block with periodic array of subwavelength silicon microstructures, simultaneously acts as the diffraction grating as well as the slab waveguide and hence enables the observation of GMRs. At oblique incidence, two frequency detuned GMRs are observed, which arises from two Coupling of diffracted waves in gratings with the waveguide modes gives rise to the guided mode resonances (GMRs). The GMRs provide designer linewidth and resonance intensity amidst a broad background, and thus have been widely used for numerous applications in visible and infrared spectral regions. Here, terahertz GMRs are demonstrated in low-loss, all-dielectric metasurfaces, which are periodic square lattices of silicon cuboids on quartz substrates. The silicon cuboid lattice simultaneously acts as a diffract...

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Design and fabrication of broadband guided-mode resonant reflectors in TE polarization

Cited by 17 publications

References 14 publications

Recent Advances in Resonant Waveguide Gratings

Recent Advances in Resonant Waveguide Gratings

All-polymer photonic crystal slab sensor

Guided‐Mode Resonances in All‐Dielectric Terahertz Metasurfaces

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