For the first time, to best of our knowledge, we have combined a spatial light modulator with single reflective optical element for holographic fabrication graded photonic super-crystals. The hybrid laser projection system takes advantage pixel-by-pixel phase control and large-area, small-feature fabrication. Graded super-crystals dual period, or period basis, been fabricated location dependence across interference pattern. samples explained by simulation eight-beam patterns.

Photonic quasi-crystals and photonic crystals with certain degrees of disorder can have a broadband light-matter interaction. In this paper, we present the holographic fabrication graded super-quasi-crystals through pixel-by-pixel phase pattern engineering using spatial light modulator. Using same arranged in decagon, fabricated five-fold symmetry multiple levels gradients super-crystals rectangular unit super-cells, depending on Fourier filter. Although degree was incorporated...

The newly discovered graded, superlattice photonic crystals with dual periodicity and basis present great opportunity for electromagnetic wave control in devices. These graded superlattices can be holographically fabricated by eight beam interference lithography. We have computed, through electrodynamic simulation, the light extraction efficiency of planar, white organic light-emitting diodes where Al cathode is patterned basis. Two super-lattices four-fold two-fold symmetries are used to...

A versatile investigation has been accomplished on the performances of circular, square, triangular and hexagonal electromagnetic bandgap structures (EBGSs). The authors have observed that different EBGSs having an identical etching area perform identically. Therefore, a new definition filling factor (FF) proposed yields value FF performance for various shapes. After that, rigorous is carried out to find optimum FF. Ring EBGS; furthermore, presented as effective means improve overall...

Recently developed graded photonic super-crystals show an enhanced light absorption and extraction efficiency if they are integrated with a solar cell organic emitting device, respectively. In this paper, we present the holographic fabrication of super-crystal rectangular unit super-cell. The spatial modulator-based pixel-by-pixel phase engineering incident laser beam provides high resolution pattern for interference lithography. This also flexible design different ratio length over width is...

The newly discovered graded photonic super-crystal (GPSC) with a large size of unit cell can have novel optical properties that not been explored. super-cell in the GPSC be designed to or small and thus no band gap several gaps. structures Si help predict light absorption Si. Photonic resonance modes enhance silicon; however, gaps decrease for incident angle. device patterned 6a × (a is lattice constant traditional crystal) has broadband high strong incident-angular dependence. 12a...

In a planar organic light-emitting diode (OLED), over 50% of emitted lights are trapped as waveguide mode in the organic-indium tin oxide layer and surface plasmon polariton at metal interface. The light extraction efficiency into glass substrate is greatly enhanced when organic/Al interface OLED patterned with graded photonic super-crystal (GPSC), by destroying plasmonic resonance condition through patterns scattering glass. increases area fraction regions GPSC. can reach above 68.5%,...

Light-trapping enhancement in newly discovered graded photonic super-crystals (GPSCs) with dual periodicity and basis is herein explored for the first time. Broadband, wide-incident-angle, polarization-independent light-trapping was achieved silicon solar cells patterned these GPSCs. These were designed by multi-beam interference, rendering them flexible efficient. The optical response of cell retained Bloch-mode resonance; however, light absorption greatly enhanced broadband wavelengths due...

In this paper, we studied the localized surface plasmon polariton (SPP) resonance in hole arrays transparent conducting aluminum-doped zinc oxide (AZO). CMOS-compatible fabrication process was demonstrated for AZO devices. The SPP observed and confirmed by electromagnetic simulations. Using a standing wave model, dominated standing-wave along (1,1) direction square lattices. This research lays groundwork technique that can contribute to core technology of future integrated photonics through...

Novel designs of dumbbell shape EBGS have been reported with distinguished filtering features that include larger stopband, dual-band, multi-band and low-pass performance. None but EBG structure alone can show all mentioned different performances minor modification change in dimensions. Beyond the conventional ideas a special idea has incorporated by restructuring size dimension pattern to amend result. Proposed showed excellent obtained for much smaller etched area; hence ripple heights...

In this paper, we report the formation of resonance cavities within graded photonic super-crystals (GPSCs) with unit cells formed via a near-uniform central region eight side regions.The regions in GPSCs have several band gaps, whereas uniform has one gap.The different locations gaps form cavity and surrounding more at boundary corresponding quality-factor been calculated to be as high 5.8×10 5 .The relatively low-quality factor.Broadband light-matter interaction observed simulation...

A novel technique of designing nonuniform dumbbell shape electromagnetic bandgap structure (EBGS) assisted microwave transmission line has been proposed that shows distinguished performance. The design sinusoidal appearance binomially distributed EBG structures. Tapered EBGS designs using the method have investigated and result is compared with performance corresponding uniform design. Distinguished low-pass filtering (LPF) observed from not only sharp attenuation; but also significantly low...

For the first time, we are able to generate over 1000 diffraction spots from a graded photonic super-crystal with unit super-cell size of 12a × where is lattice constant and hole radii gradually changed in dual directions. The pattern reveals unique properties. order diffractions (±1,0) or (0,±1) disappear. Fractional orders observed inside square vertices (1,1), (1,−1), (−1,−1) (−1,−1). fractional can be understood lattices period a. However, dual-lattice model considered explain...

Two patterns of electromagnetic bandgap structure (EBGS) have been proposed — one is dumbbell shape EBGS having circular slots as bigger and another rectangular EBGS. A sequence arbitrary coefficients has to make nonuniform EBGSs that results better performance than realized by binomiall coefficients. potential technique also imposed upon the EBG provides more improved scattering parameter performance. An patterned investigated too perform a low-pass filter. The performances both designs...

Al-doped ZnO (AZO) can be used as an electrically tunable plasmonic material in the near infrared range. This paper presents finite-difference time-domain (FDTD) simulations on total light absorption (TLA) resulting from coupling of a surface plasmon polariton (SPP) with Fabry-Pérot (F-P) resonance three-layer structure consisting AZO square lattice hole array, spacer, and layer silver. Firstly, we identified that will couple to F-P because SPP standing wave (1,0) direction lattice. Two...

A technique of reducing the size tapered EBGS assisted microstrip T-line is proposed. After that, offset has been proposed for getting improved performance over EBGS. This also eliminates limitation having larger mother while using Offsetting includes effective use number at beneath T-line, substantially reduced and with a controllability.

Tapering electromagnetic bandgap (EBG) structures is a common method in designing microstrip filters with different periodic structures. A novel technique for tapering EBG the amplitude coefficients obtained from sine function has been illustrated. This deduces mellifluous that improves performance reasonable stopband width, preferable insertion loss level, and much-minimized passband ripples compared to similar designs other methods (e.g., binomial distribution, Chebyshev conventional...

A novel modified dumbbell shape electromagnetic bandgap structure (EBGSs), trapezoidal slotted EBGS, has been introduced. Very wide stopband and improved low-pass performances have reported for particular designs using them. These are compared with conventional EBGS. Trapezoidal pattern shown very attractive performance sharp attenuation significantly reduced ripple heights in insertion loss curve.

It is challenging to realize the complete broadband absorption of near-infrared in thin optical devices. In this paper, we studied high light two devices: a stack Au-pattern/insulator/Au-film and Au-pattern/weakly-absorbing-material/Au-film where Au-pattern was structured graded photonic super-crystal. We observed multiple-band absorption, including one near 1500 nm, Au-pattern/spacer/Au-film. The due gap surface plasmon polariton when spacer thickness less than 30 nm. Broadband appears...

Graphene has been used as an electrically tunable material for switchable devices. A large area fabrication of Al-doped ZnO/Al2O3/graphene/Al2O3/gold/silicon device was enabled by a spin-processible hydrophilic mono-layer graphene oxide. The obtained directly from oxide during the atomic layer deposition without other extra steps. significant shift Raman frequency up to 360 cm−1 observed in fabricated device, indicating structural change graphene. absorption with negative voltage applied on...

Coupling of light to surface plasmons at metal cathode represents a significant loss in organic light-emitting diode. The newly discovered graded photonic super-crystals with dual periodicity and basis, present great opportunity improve the out-coupling (The extraction efficiency) from diodes. These can be holographically fabricated by eight beam interference lithography. In this paper, we have computed, through electrodynamic simulation, efficiency planar, diodes where Al is patterned...

In this article, a modified dumbbell-shaped electromagnetic bandgap structure is presented that exhibits multiband bandstop performance at different microwave frequencies in the range of 3 GHz to 17 GHz. Four stop-bands are formed: first two unlicensed radio application frequency band (3.1–10.6 GHz), third one X-band (8–12 and fourth Ku-band (12–18 GHz). Besides, stop-band pass-band widths, insertion loss, return loss very attractive.