Optimization of two-photon absorption enhancement in one-dimensional photonic crystals with defect states

H., G.; Shen, Jie; Rajiv, K.; Tang, S. H.; Zhang, Z. J.; Hua, Zhongyi

doi:10.1007/s00340-005-1730-8

Cited by 19 publications

(4 citation statements)

References 39 publications

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“…A DBR can achieve near total reflection within a designated wavelength of light. Various methods have been utilized to fabricate DBR layers, such as electron beam (e‐beam) evaporation, [ 16–18 ] sputtering, [ 19,20 ] chemical vapor deposition, [ 21,22 ] and sol–gel coating. [ 23,24 ] DBRs have been widely utilized in many applications, including optical filters, [ 25 ] microcavities, [ 20,26 ] photonic crystals, [ 27 ] and organic light‐emitting diodes.…”

Section: Introductionmentioning

confidence: 99%

High‐Efficiency Vivid Color CIGS Solar Cell Employing Nondestructive Structural Coloration

Shafian

Lee

et al. 2022

Solar RRL

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Structural coloration is an effective method for coloring a solar cell with minimum optical loss. For the application of building integrated photovoltaics, it is desirable to integrate structural colors directly onto the solar cell without damaging it with an economical process. Herein, a solution‐processed distributed Bragg reflector (sDBR) is introduced to realize efficient and vividly colored CuInxGa(1−x)Se2 (CIGS) solar cells. The sDBR is directly combined with the CIGS solar cell at room temperature without damaging the photoactive layer. The sDBR is fabricated on CIGS solar cells by spin coating alternate layers of solution‐processable TiO2 nanoparticles bound with acetylacetone and a polymethyl methacrylate solution. The vividly colored CIGS solar cells exhibit high reflectivity and narrow bandwidth at the designated wavelength, resulting in pure red, green, and blue. The reduction in the photocurrent by the coloring is minimized due to the narrow bandwidth characteristics of the sDBR, while a gain in the photocurrent is obtained at wavelengths outside of the range used for coloring due to the antireflection eﬀect of the sDBR. As a result, the power conversion efficiency of R, G, and B sDBR/CIGS solar cells is 97.2%, 99.4% and 102%, respectively, compared to a conventional CIGS solar cell.

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Section: Introductionmentioning

confidence: 99%

High‐Efficiency Vivid Color CIGS Solar Cell Employing Nondestructive Structural Coloration

Shafian

Lee

et al. 2022

Solar RRL

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“…The intensity the local field increases with NOP [18] because the number of trips of a light beam propagating through the thick defect layer increases with the NOP of the dielectric mirrors. Similarly, for the same reason the defect mode localized at the mid-gap of the PBG will experience a stronger local field than that for a defect mode displaced from the midgap.…”

Section: Resultsmentioning

confidence: 99%

Optical limiting in one-dimensional photonic bandgap material with a bulk nonlinear defect

Liu¹,

Chen²,

Zang³

et al. 2010

J. Opt.

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A composite optical limiting configuration is proposed, which consists of a one-dimensional photonic bandgap structure and a thick bulk material. Using the backward split-step scheme, we studied the transmission and optical limiting properties of the composite structure. Results show that the performance of the optical limiting of the composite structure is better than that of the single bulk material and the optical limiting ability is improved by almost two orders of magnitude. The effects of the number of periods and the thickness of the bulk material on the nonlinear transmittance of this structure are studied. The contribution of nonlinear refraction and absorption to the composite optical limiting is also analyzed.

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“…The defect mode of the PC has a stronger effect on electric field localization and its associated optical nonlinearity, which paves the way for one of the simplest two-port bistable switches. Much attention has been paid ever since the first theoretical prediction aimed at realizing a suitable candidate for low-cost integrated photonic circuits [10][11][12][13]. Normally, the transmission properties of the defect mode can be easily modified by appropriately altering the optical thickness of Bragg reflectors.…”

Section: Introductionmentioning

confidence: 99%

Bistable Switch Based on Tunable Fano Resonance in Coupled Resonator-Cavity Structure

et al. 2023

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We report a side-coupled resonator-cavity configuration with a tunable Fano-type interference effect for a novel subwavelength switch. A defective microstrip photonic crystal (PC) structure is designed to provide a continuum state, while a split ring resonator (SRR) is introduced to offer a narrow discrete resonance. The SRR is conductively side-coupled with the microstrip PC cavity in a subwavelength volume. Interactions between them result in Fano-type transmitting spectra with a sharp and asymmetric spectral line profile. A varactor diode serving as the nonlinear medium inclusion is integrated into the slit of the SRR for active control of the sharp Fano resonance. The strongly localized field produced by Fano resonance plays a role in improving the nonlinear properties of the microstrip PC cavity. It is found that a significant blue shift of 94 MHz on the Fano resonance frequency can be achieved by increasing the input power levels from −25 dBm to 8 dBm. We also found that the maximum transmission contrast exceeding 15.9 dB can take place between two bistable states existing at 3.05 dBm and 4.32 dBm for a bidirectional sweep of input power under a monochromatic signal frequency of 1.27 GHz. The findings may benefit the exploitation of metamaterials-assisted active photonic nanocircuits.

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Optimization of two-photon absorption enhancement in one-dimensional photonic crystals with defect states

Cited by 19 publications

References 39 publications

High‐Efficiency Vivid Color CIGS Solar Cell Employing Nondestructive Structural Coloration

High‐Efficiency Vivid Color CIGS Solar Cell Employing Nondestructive Structural Coloration

Optical limiting in one-dimensional photonic bandgap material with a bulk nonlinear defect

Bistable Switch Based on Tunable Fano Resonance in Coupled Resonator-Cavity Structure

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