Full-Color Laser Displays Based on Optical Second-Harmonic Generation from the Thin Film Arrays of Selenium Nanowires

Abstract

The second-harmonic generation (SHG) phenomenon, which readily supports the characteristic advantages of promising laser-based display systems, brings a new concept to advanced displays. Here, we demonstrate a laser projection display that utilizes the fabrication and design principles in individual micron-scale pixel arrays by depositing colloidal Se nanowires, a nonlinear optical nanomaterial for full-color light emission. Our system reveals the manufacturing process of planar light-emitting elements without the use of complex color segments, and the layout represents a full-color laser display with high-resolution pixels extracted from the combination of a pulsed femtosecond laser scanning process to access the frequency up-conversion technique based on a wavelength-tunable manner. The work presents attractive features for newly emerging multifunctional optical components composed of unique nanomaterials that can be applied for displays, bioimaging, and other optoelectronic devices.

Selenium nanomaterials enabled flexible and wearable electronics

“…(C) (i) Band structure; (ii) and (iii) Band contour for the bottom conduction band (upper panel) and the top valence band (lower panel) in the first Brillouin zone [61] ; Copyright 2019; IOP Publishing. (D) Total and orbital-projected density of states (DOS) for Se [73] ; Copyright 2019, American Physical Society. (E) Transfer curves of a Se nanosheet phototransistor measured under various laser irradiation powers at V ds = 3 V [57] ; Copyright 2017, American Chemical Society.…”

“…However, these band distributions showed significant anisotropy at the band contours around P1 [Figure 5C (i)-(iii)]. A density-functional-theory method was conducted to calculate the total and orbital projected densities of states of the trigonal Se [73] . As shown in Figure 5D, the lowest valence band ranging from -15.9 to -9.5 eV can be found in the VB1 region.…”

“…Taking advantages of high photoconductivity, electrical anisotropy, and nonlinear optical properties, Se nanomaterials show great potential in optoelectrical applications [73][74][75][76][77] . Figure 5E shows the optoelectronic property of a phototransistor based on Se nanosheets [57] .…”

Guided Wrinkling of Hierarchically Structured Nanoporous Gold Films for Improved Surface‐Enhanced Raman Scattering Performance

“…[14] Therefore, the design of the well-studied "hot spots" in the NPG film is crucial to preparing the SERSactive substrate with an affordable and tunable capability. [15] Although some other strategies have been presented for SERSactive substrate by conventional lithographic methods (i.e., electron beam, interference, and nanoimprint lithography), [16][17][18][19] these customized manufacturing process of engraving nanostructured surface generally involves equipment-based expensive techniques and should consider the trade-off in resolution with throughput. [16,20,21] Compared to this, the improved SERS properties can be demonstrated with the enhancement of the LSPR in the bicontinuous porous structure by dealloying the NPG film for a suitable structural formation using appropriate fabrication processes.…”

Room-temperature Continuous-Wave Upconversion White Microlaser Using a Rare-earth-Doped Microcavity

“…White lasers have the potential to be used for fluorescence microscopy − and color lighting and display, − as they have a higher power density, a higher contrast ratio, and a wider color gamut, compared with traditional light emitting diodes. Besides, as multi-wavelength coherent light sources, white lasers can also be applied in optical signal processing, − high-speed visible-light communications, − and holograms. , However, the realization of white lasers is still suffering from the balance between optical gain and feedback in a broadband wavelength range and the compatibility between gain materials and cavity structures .…”