Volume holographic gratings: fabrication and characterization

Bianco, G.; Ferrara, Maria Antonietta; Borbone, Fabio; Roviello, Antonio; Pagliarulo, Vito; Grilli, Simonetta; Ferraro, Pietro; Striano, V.; Coppola, Giuseppe

doi:10.1117/12.2179121

Cited by 11 publications

(9 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More specifically, design modifications to the on‐tip grating platform should be explored, in order to substantially mitigate the associated detrimental effects. For instance, reliefless technological solutions based on volume‐phase holographic gratings could represent an attractive scenario, which may also endow dramatic improvements in the diffraction efficiency (approaching 100%) and low polarization sensitivity . Along the lines of ref.…”

Section: Discussionmentioning

confidence: 99%

Excitation of Bloch Surface Waves on an Optical Fiber Tip

Scaravilli

Micco

Castaldi

et al. 2018

Advanced Optical Materials

View full text Add to dashboard Cite

to the development of extremely sensitive surface plasmon resonance (SPR) biosensors, which can rely on mature fabrication technologies, standard biofunctionalization protocols, and commercial scale production. [1,[3][4][5] In spite of the excellent performance achieved by state-of-the-art SPR platforms, with reported limits of detection (LODs) approaching 10 −7 refractive index units (RIU), [4,6] further improvements are unavoidably limited by the reliance on lossy materials (typically metals). This yields an undesirable resonance broadening, thereby posing an upper bound to the overall figure of merit (FOM). [6] For this reason, there is a strong push to explore alternative, larger-FOM SW implementations. [1,[7][8][9][10][11] As a prominent example, Bloch SWs (BSWs) on truncated 1D photonic crystals (1DPCs) represent an attractive alternative to SPPs, as recently demonstrated in several proof-of-principle studies. [9,[12][13][14][15][16] In spite of sensitivities to local refractive index (RI) changes lower than SPR platforms, the completely dielectric low-loss structure of a BSW sensor yields sensibly sharper resonances, leading to generally larger FOMs. [13][14][15][16][17] This has recently led to the successful development of label-free biosensors exhibiting competitive performance in practical biomolecular detections. [18][19][20][21][22][23][24][25] Moreover, BSW structures offer further benefits with respect to other SW-based counterparts, such as easy realization and experimental observation, and great flexibility in terms of wavelength range of operation, materials choice, and tailoring of the field distribution for specific sensing applications. [1,9,[13][14][15]17,[26][27][28] While most sensing platforms proposed in the literature rely on bulky prism-coupled planar configurations, [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] the integration of BSW structures with optical fibers would bring significant benefits in terms of compactness, light weight, remote sensing capability, biocompatibility, and ease of interrogation. This is especially attractive within the emerging "labon-fiber" technology framework. [29][30][31][32][33][34] The interest in this topic has started growing within the last two years, as witnessed by theoretical studies of BSW sensors based on the use of D-type fibers, [35] and unclad regions of multimode fibers. [36] A first experimental demonstration on a tapered single-mode fiber has also been provided very recently. [37] Within this context, a more intriguing scenario is represented by the integration of the resonant structure directly on the fiber tip. This would allow exploiting fabrication methodologies typically adopted for photonic biochips, thereby enabling the development of probes The integration of structures supporting Bloch surface waves (BSWs) with optical fibers is highly desirable, since it would enable the development of high-figure-of-merit miniaturized all-fiber optrodes, opening new pathways within the "lab-on-fiber" roadmap. Here, the first expe...

show abstract

Section: Discussionmentioning

confidence: 99%

Excitation of Bloch Surface Waves on an Optical Fiber Tip

Scaravilli

Micco

Castaldi

et al. 2018

Advanced Optical Materials

View full text Add to dashboard Cite

show abstract

“…Finally, the sol-gel chemistry versatility allows obtaining a high level of interpenetration between the organic and inorganic networks, as reported in Refs. [4,[45][46][47]. Photopolymer with a very low outgassing level and a high resistance to strong thermal excursions, that can be useful for some applications, was obtained by sol-gel techniques [4].…”

Section: Photopolymersmentioning

confidence: 99%

“…Thus, an enhancement of the collected light is desirable. Of course, in the space the holographic materials must be able to withstand much more drastic conditions respect to earth applications, due to strong thermal excursions, high vacuum and the presence of high-energy gamma, electronic and protonic radiation originating from the solar wind [4,46,47].…”

Section: Commercial and Space Holographic Concentratorsmentioning

confidence: 99%

Volume Holographic Optical Elements as Solar Concentrators: An Overview

Ferrara

Striano²,

Coppola

2019

Applied Sciences

View full text Add to dashboard Cite

Generally, to reduce the area of a photovoltaic cell, which is typically very expensive, solar concentrators based on a set of mirrors or mechanical structures are used. However, such solar concentrators have some drawbacks, as they need a tracking system to track the sun’s position and also they suffer for the overheat due to the concentration of both light and heat on the solar cell. The fundamental advantages of volume holographic optical elements are very appealing for lightweight and cheap solar concentrators applications and can become a valuable asset that can be integrated into solar panels. In this paper, a review of volume holographic-based solar concentrators recorded on different holographic materials is presented. The physical principles and main advantages and disadvantages, such as their cool light concentration, selective wavelength concentrations and the possibility to implement passive solar tracking, are discussed. Different configurations and strategies are illustrated and the state-of-the-art is presented including commercially available systems.

show abstract

“…Its function is to couple the image generated by the image source into the waveguide and out of the waveguide. Partial mirror array (PRMA) [8], volume holographic grating (VHG) [9] and surface relief grating (SRG) [10] are three common solutions for optical waveguide technology. PRMA manufacturing process requirements are extremely high, resulting in a generally low product yield rate.…”

Section: Introductionmentioning

confidence: 99%

Holographic Waveguide Display With Large Field of View and High Light Efficiency Based on Polarized Volume Holographic Grating

Weng

Wei

et al. 2022

IEEE Photonics J.

View full text Add to dashboard Cite

We propose a polarization multiplexing structure based on multilayer reflective polarized volume holographic gratings(PVGs) to improve the field of view and brightness of the augmented reality waveguide display. The multilayer structure forms the splicing of different response bandwidths by stacking PVGs with different periodic components, and realizes the expansion of the wavelength (angle) bandwidth. The polarization multiplexing structure controls the polarization of the diffracted light by controlling the rotation direction of the liquid crystal pitch in the liquid crystal material, so that both left-hand and right-hand circularly polarized light are diffracted to enhance efficiency. Based on these two structures, the wavelength bandwidth of PVG is increased by 40 nm, the angular bandwidth is increased by 10°and the diffraction efficiency is nearly doubled. In order to verify the feasibility of these two structures, we use the holographic waveguide display with OLED as the image source. The demonstrated waveguide prototype shows a complete display with a diagonal field of view of 55°. The brightness of virtual image was measured as high as 1100 cd/m 2 with a transparency of 72% for ambient light.

show abstract

Volume holographic gratings: fabrication and characterization

Cited by 11 publications

References 12 publications

Excitation of Bloch Surface Waves on an Optical Fiber Tip

Excitation of Bloch Surface Waves on an Optical Fiber Tip

Volume Holographic Optical Elements as Solar Concentrators: An Overview

Holographic Waveguide Display With Large Field of View and High Light Efficiency Based on Polarized Volume Holographic Grating

Contact Info

Product

Resources

About