Guided resonances in asymmetrical GaN photonic crystal slabs observed in the visible spectrum

Rosenberg, A.; Carter, Michael; Casey, J. A.; Kim, Mijin; Holm, R. T.; Henry, R.L.; Eddy, Charles R.; Shamamian, V. A.; Bussmann, K.; Shi, Shouyuan; Prather, Dennis W.

doi:10.1364/opex.13.006564

Cited by 68 publications

(38 citation statements)

References 3 publications

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“…More specifically, GRs in PC slabs have been exploited to demonstrate mirrors [3], optical filters [4], polarization splitters [5], and displacement sensors [6], just to mention a few. The observation of GRs in asymmetric PC slabs has been also reported [7], as well as the characterization of their dependence on the illumination angle [8]. However, it is worth noting that all of these experiments, as well as most of the numerical work, have focused only on periodic PCs.…”

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confidence: 92%

Experimental evidence of guided-resonances in photonic crystals with aperiodically ordered supercells

Ricciardi¹,

Pisco²,

Gallina³

et al. 2010

Opt. Lett.

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We report on the first experimental evidence of guided resonances (GRs) in photonic crystal slabs based on aperiodically ordered supercells. Using Ammann-Beenker (quasiperiodic, eightfold symmetric) tiling geometry, we present our study on the fabrication, experimental characterization, and full-wave numerical simulation of two representative structures (with different filling parameters) operating at near-IR wavelengths (1300-1600 nm). Our results show a fairly good agreement between measurements and numerical predictions and pave the way for the development of new strategies (based on, e.g., the lattice symmetry breaking) for GR engineering.© [9] argued that strict periodicity is an essential requirement for the excitation of GRs. However, in some recent studies [10][11][12], we have already demonstrated by numerical analysis that GRs can be excited in PC slabs based on aperiodically ordered supercells, and we have also shown the possibility of controlling the GR excitation by introducing ad hoc point defects [12]. In spite of these first numerical results, to the best of our knowledge, the excitation of GRs in globally aperiodic photonic quasicrystals (PQC) or in PC slabs with aperiodically ordered supercells has never been experimentally observed. Starting from the periodicapproximant case, for which rigorous full-wave numerical modeling [10][11][12] is still computationally affordable, we now report the experimental evidence of GR excitation in PCs with aperiodically ordered supercells.In accordance with our previous papers [10-12], we considered a supercell based on a quasiperiodic (Ammann-Beenker, octagonal) lattice exhibiting eightfold symmetry [13] and containing 97 elements (or a fraction of them), shown in Fig. 1(a).We chose a silicon-on-insulator (SOI) wafer characterized by a top silicon layer with a nominal thickness t ¼ 220 nm, 2 μm of buried oxide, and about 750 μm of bulk silicon for the experimental realization. The PQC parameters were chosen on the basis of the design carried out in [10] but took fabrication constraints into account, e.g., leaving the buried-oxide layer underneath the guiding layer for mechanical support and making holes with a radius larger than 90 nm to guarantee that they are properly etched into the silicon slab. Based on these considerations, as a first attempt for our study, we chose a lattice constant [see Fig. 1(a)] a ¼ 300 nm and a hole radius r ¼ 95 nm, corresponding to a filling parameter r=a ¼ 0:32. Because the focus of this first study is on providing some generic experimental evidence of the GR phenomenon in PQCs, the design parameters were not optimized for a specific application.A schematic of the main steps of the fabrication process is illustrated in Fig. 1(b). The pattern was first 3946OPTICS LETTERS / Vol. 35, No. 23 /

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confidence: 92%

Experimental evidence of guided-resonances in photonic crystals with aperiodically ordered supercells

Ricciardi¹,

Pisco²,

Gallina³

et al. 2010

Opt. Lett.

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“…So they can be used to form active device, LD or LED. Among these materials, GaN based devices is more promising for optoelectronics, for it has wide transparent wavelength range (from visible to the far-infrared), high refractive index, the advantages in mechanical and chemical properties, such as large elastic modulus, high piezoelectric, and piezoresistive coefficients, as well as chemical inertness [1][2][3][4][5]. The unique properties of III-nitrides may allow the creation of photonic integrated circuits (PICs) with unprecedented properties and functions.…”

Section: Introductionmentioning

confidence: 99%

“…This innovative free-standing structure brings promising direction for planar photonic: (1) The suspended GaN slab in space features good optical confinement in the vertical direction and avoids the light loss into the substrate due to the free-standing characteristic [15][16][17]. (2) The high contrast grating and waveguide with air cladding allows a tight confinement of the light and enables a high density of integration. (3) Providing ways to partially eliminating the roadblock to active and passive components monolithic integration.…”

Section: Introductionmentioning

confidence: 99%

Design of free-standing GaN strip waveguide and grating couplers

Liu

Wang

et al. 2016

Optik

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“…[9][10][11][12][13][14] These resonances are standing electromagnetic waves that are guided with the electric field distribution confined within PCS but are also strongly coupled to out-of-the-plane radiation modes due to phase matching provided by the periodic lattice structure of the PCS. We have reported surface-normal optical Fano resonance filters, based on single crystalline semiconductor nanomembranes ͑NMs͒ that are transferred to both rigid glass substrates and to flexible polyethylene terephthalate ͑PET͒ substrates.…”

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confidence: 99%

Colloidal quantum dot absorption enhancement in flexible Fano filters

Chen

Yang

Qiang

et al. 2010

Applied Physics Letters

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We report here modified absorption property of colloidal quantum dots ͑CQDs͒ inside flexible Fano filters-made of patterned single crystalline silicon nanomembrane transferred onto flexible plastic substrates. Enhanced optical absorption was obtained both experimentally and theoretically, when the CQD absorption peak spectrally overlaps with Fano resonance peak. On the other hand, suppressed absorption was observed when the Fano resonance has no spectral overlap with the CQD absorption bands.

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Guided resonances in asymmetrical GaN photonic crystal slabs observed in the visible spectrum

Cited by 68 publications

References 3 publications

Experimental evidence of guided-resonances in photonic crystals with aperiodically ordered supercells

Experimental evidence of guided-resonances in photonic crystals with aperiodically ordered supercells

Design of free-standing GaN strip waveguide and grating couplers

Colloidal quantum dot absorption enhancement in flexible Fano filters

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