Printed photonic elements: nanoimprinting and beyond

Zhang, Cheng; Subbaraman, Harish; Li, Qiaochu; Pan, Zeyu; Ok, Jong G.; Ling, Tao; Chung, Chi Jui; Zhang, Xingyu; Lin, Xiaohui; Chen, Ray T.; Guo, L. Jay

doi:10.1039/c6tc01237j

Cited by 75 publications

(48 citation statements)

References 190 publications

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“…Besides, compared to extremely high-frequency piezoelectric transducers that usually involve sophisticated fabrication and, hence, are usually expensive, PS micro-ring is fabricated with much lower cost and better repeatability using nano-imprinting technology [25,33]. The micro-ring based PASA technique holds potential to detect morphological abnormalities of cells and relate them with corresponding pathological conditions.…”

Section: Discussionmentioning

confidence: 99%

Characterizing cellular morphology by photoacoustic spectrum analysis with an ultra-broadband optical ultrasonic detector

Tian

Zhang

et al. 2016

Opt. Express

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Photoacoustic spectrum analysis (PASA) has been demonstrated as a new method for quantitative tissue imaging and characterization. The ability of PASA in evaluating microsize tissue features was limited by the bandwidth of detectors for photoacoustic (PA) signal acquisition. We improve upon such a limit, and report on developments of PASA facilitated by an optical ultrasonic detector based on micro-ring resonator. The detector's broad and flat frequency response significantly improves the performance of PASA and extents its characterization capability from the tissue level to cellular level. The performance of the system in characterizing cellular level (a few microns) stochastic objects was first shown via a study on size-controlled optically absorbing phantoms. As a further demonstration of PASA's potential clinical application, it was employed to characterize the morphological changes of red blood cells (RBCs) from a biconcave shape to a spherical shape as a result of aging. This work demonstrates that PASA equipped with the micro-ring ultrasonic detectors is an effective technique in characterizing cellular-level micro-features of biological samples.

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Section: Discussionmentioning

confidence: 99%

Characterizing cellular morphology by photoacoustic spectrum analysis with an ultra-broadband optical ultrasonic detector

Tian

Zhang

et al. 2016

Opt. Express

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“…Solution to this problem can be obtained using approaches that combine the advantageous features of the additive manufacturing methods and the planar semiconductor technology. The productivity of such an approach can be demonstrated with the example of nanoimprint lithography . In this case, the method of sequential electron lithography is used to fabricate a stamp with a nanorelief and, then, that stamp can be repeatedly used for making a nanorelief on other substrates.…”

Section: Design Of Metasurfacementioning

confidence: 99%

Large‐Area 3D‐Printed Chiral Metasurface Composed of Metal Helices

Golod

Seyfi

Buldygin

et al. 2018

Advanced Optical Materials

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of semiconductor technology, such as consecutive lithographic steps with layers alignment, and the deposition and chemical etching of materials, are used. Besides, for preventing the capillary sticking of 3D microstructures and nanostructures, special treatments of surfaces and the supercritical drying technique are used after liquid-etching and resistdevelopment steps. [15,16] In ref.[17], a method was proposed for fabrication of microhelices and nanohelices from elastically strained thin semiconductor strips detached, with the help of selective etching of a sacrificial layer, from the substrate and then rolled in classically shaped 3D helices. The latter approach, combined with supercritical drying, [16] was successively employed for forming, on a GaAs substrate, a chiral metamaterial in the form of a single-layer array of 14.5 µm diameter 3D microhelices fabricated from a strained hybrid semiconductor-metal (In 0.2 Ga 0.8 As/GaAs/Ti/Au) films. [18,19] It was shown that the maximum polarization-plane rotation angle for terahertz radiation having passed the heliceson-substrate system reached 17° at 2.1 THz frequency. A close value for the polarization-plane rotation angle of terahertz radiation, 14°, was also obtained using a structure that involved 3D metal gammadion-shaped elements located directly on the surface of pyramidal trenches etched in a silicon substrate. [20] Experimental data obtained for both chiral metamaterials proved a high effectiveness of the interaction of electromagnetic radiation with the 3D conducting microresonators, thus encouraging the workers to spent further efforts on the search for simpler and cheaper technological solutions.Today, rapid progress in the development of additive technologies [21,22] opens up wide opportunities in the field of 3D chiral resonator elements, 3D metamaterials, and photonic crystals. [23][24][25] A number of sequential 3D printing methods have enabled the point-by-point formation of free-standing conducting helices for chiral metamaterials active in a broad range of radiation wavelengths, from microwave (MW) to optical frequencies. Those methods can be classed to several groups. First, these are methods including the electrochemical and chemical deposition of metals onto the surface of printed 3D polymer structures: i) filling of helically shaped channels with a metal [9,26] and ii) covering of free-standing 3D helical microcarcasses with a metal. [27] Second, this is the growth of An original design for chiral metasurfaces formation is proposed. The hybrid fabrication approach is based on the 3D printing of polymer substrates with a shape-generating "helical" relief, molding, and subsequent shadow metal deposition. The formed double-layer grating of multiturn metal helices rotates the polarization plane of sub-terahertz and microwave radiation through an angle in excess of 40°. Both experimentally and in numerical simulations, it is demonstrated that re-reflection phenomena occur in the "metal helixpolymer substrate" hybrid structure. Those phenomena per...

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“…As an experimental demonstration, a 3.5 cm × 3.5 cm size sample with the lens pitch of 50 µm is fabricated by using thermal imprinting, [12][13][14] which represents a low cost manufacturing method. This is achieved by laminating an alternating absorber/colored stripe substrate underneath a lenticular lens array with specific dimensions, where the light in the veiling glare range is absorbed by the black stripes leaving light from colored stripes reaching driver's eye.…”

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confidence: 99%

Lenticular‐Lens‐Based Colored Antiglare Dashboard Surfaces

Zhu

Zhang

et al. 2016

Adv Materials Technologies

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All current vehicle dashboards are black in order to prevent any veiling glare that interferes safe driving. Here, the authors report on a novel design of surface that can impart color to the dashboard and does not cause veiling glare to the driver. This is made possible by covering a substrate with alternating absorber/colored stripes with specially designed lenticular lens arrays, where reflected light rays are controlled out of the veiling glare range while at the same time create visual colors to drivers. As an experimental demonstration, a 3.5 cm2 square sample is fabricated by imprinting method. The presented approach provides a new application of lenticular lenses and can be potentially applied to embellish vehicles' interiors. Due to the small pitches (≈50 µm) of lenses, the proposed method can even be extended for vehicle displays with high resolutions if integrating with active devices.

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Printed photonic elements: nanoimprinting and beyond

Abstract: In order to manufacture large-scale photonic devices of various dimensions at a low cost, a number of printing-based patterning techniques have been developed.

Cited by 75 publications

References 190 publications

Characterizing cellular morphology by photoacoustic spectrum analysis with an ultra-broadband optical ultrasonic detector

Characterizing cellular morphology by photoacoustic spectrum analysis with an ultra-broadband optical ultrasonic detector

Large‐Area 3D‐Printed Chiral Metasurface Composed of Metal Helices

Lenticular‐Lens‐Based Colored Antiglare Dashboard Surfaces

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