High Resolution Lithography as a Tool to Fabricate Quasiperiodic Crystals

Petti, Lucia; Matarazzo, Vitantonio; Rippa, Massimo; Zito, Gianluigi; Nicola, S. De; Abbate, Giancarlo; Mormile, Pasquale

doi:10.1063/1.3253892

Cited by 7 publications

(6 citation statements)

References 1 publication

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“…Recently, the importance of tiling geometry in the arrangement of the octagonal quasicrystal was discussed. The fabricated octagonal structure was determined by simulating the quasiperiodic transverse irradiance distribution given by 8-beam interference process and was theoretically analyzed through finite difference time domain (FDTD) simulations of the transmittance spectra [ 41 ]. The octagonal tiling gives rise to a wide photonic band-gap for low refractive index difference as low as 0.5 with an attenuation of the transmittance signal up to 50 dB [ 42 ].…”

Section: Methodsmentioning

confidence: 99%

Novel hybrid organic/inorganic 2D quasiperiodic PC: from diffraction pattern to vertical light extraction

et al. 2011

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Recently, important efforts have been dedicated to the realization of a fascinating class of new photonic materials or metamaterials, known as photonic quasicrystals (PQCs), in which the lack of the translational symmetry is compensated by rotational symmetries not achievable by the conventional periodic crystals. As ever, more advanced functionality is demanded and one strategy is the introduction of non-linear and/or active functionality in photonic materials. In this view, core/shell nanorods (NRs) are a promising active material for light-emitting applications. In this article a two-dimensional (2D) hybrid a 2D octagonal PQC which consists of air rods in an organic/inorganic nanocomposite is proposed and experimentally demonstrated. The nanocomposite was prepared by incorporating CdSe/CdS core/shell NRs into a polymer matrix. The PQC was realized by electron beam lithography (EBL) technique. Scanning electron microscopy, far field diffraction and spectra measurements are used to characterize the experimental structure. The vertical extraction of the light, by the coupling of the modes guided by the PQC slab to the free radiation via Bragg scattering, consists of a narrow red emissions band at 690 nm with a full width at half-maximum (FWHM) of 21.5 nm. The original characteristics of hybrid materials based on polymers and colloidal NRs, able to combine the unique optical properties of the inorganic moiety with the processability of the host matrix, are extremely appealing in view of their technological impact on the development of new high performing optical devices such as organic light-emitting diodes, ultra-low threshold lasers, and non-linear devices.PACS: 81.07.Pr Organic-inorganic hybrid nanostructures, 81.16.-c Methods of nanofabrication and processing, 42.70.Qs Photonic band-gap materials.

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Section: Methodsmentioning

confidence: 99%

Novel hybrid organic/inorganic 2D quasiperiodic PC: from diffraction pattern to vertical light extraction

et al. 2011

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“…The fabricated octagonal structure was determined by simulating the quasi periodic transverse irradiance distribution given by the 8-beam interference process and was theoretically analyzed through nite difference time domain (FDTD) simulations of the transmittance spectra. 34 The 12-fold quasicrystal structure proposed by Zoorob in 2000 grown by the use of the random Stampy ination method is based on a dodecagon composed of an inner hexagon consisting of six equilateral triangles surrounded by a ring of squares and equilateral triangles. Our structure is a "triangletriangle" crystal conguration with a rod radius to pitch length ratio (r/a) of 0.25.…”

Section: Photonic Quasi Crystalsmentioning

confidence: 99%

Nanostructured PEDOT:PSS film with two-dimensional photonic quasi crystals for efficient white OLED devices

et al. 2015

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“…These techniques include: electron beam lithography [46,47], focused ion beam [48], direct laser writing [17,49], atomic force microscope nano-indentation [50], multiphoton polymerization [51], projection lithography [52], contact lithography [53], and proximity lithography [1,53].…”

Section: Interference Lithographymentioning

confidence: 99%

Modeling of multiple-optical-axis pattern-integrated interference lithography systems

Sedivy

Gaylord

2014

Appl. Opt.

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The image quality and collimation in a multiple-optical-axis pattern-integrated interference lithography system are evaluated for an elementary optical system composed of single-element lenses. Image quality and collimation are individually and jointly optimized for these lenses. Example images for a jointly optimized system are simulated using a combination of ray tracing and Fourier analysis. Even with these nonoptimized components, reasonable fidelity is shown to be possible.

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High Resolution Lithography as a Tool to Fabricate Quasiperiodic Crystals

Cited by 7 publications

References 1 publication

Novel hybrid organic/inorganic 2D quasiperiodic PC: from diffraction pattern to vertical light extraction

Novel hybrid organic/inorganic 2D quasiperiodic PC: from diffraction pattern to vertical light extraction

Nanostructured PEDOT:PSS film with two-dimensional photonic quasi crystals for efficient white OLED devices

Modeling of multiple-optical-axis pattern-integrated interference lithography systems

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