Multicolor lasing prints
Van Duong Ta,Shancheng Yang,Yue Wang,Yuan Gao,Tingchao He,Rui Chen,Hilmi Volkan Demir,Handong Sun +7 more
TL;DR: In this article, the authors demonstrate mass production of printable multi-color lasing microarrays based on uniform hemispherical microcavities on a distributed Bragg reflector using inkjet technique.
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Abstract: This work demonstrates mass production of printable multi-color lasing microarrays based on uniform hemispherical microcavities on a distributed Bragg reflector using inkjet technique. By embedding two different organic dyes into these prints, optically pumped whispering gallery mode microlasers with lasing wavelengths in green and red spectral ranges are realized. The spectral linewidth of the lasing modes is found as narrow as 0.11 nm. Interestingly, dual-color lasing emission in the ranges of 515–535 nm and 585–605 nm is simultaneously achieved by using two different dyes with certain ratios. Spectroscopic measurements elucidate the energy transfer process from the green dye (donor) to the red one (acceptor) with an energy transfer efficiency up to 80% in which the nonradiative Forster resonance energy transfer dominates. As such, the acceptor lasing in the presence of donor exhibits a significantly lower (∼2.5-fold) threshold compared with that of the pure acceptor lasing with the same concentration.
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Figures
FIG. 1. (a) Schematic of the distributed Bragg reflector (DBR) substrate. (b) The deposition of a hydrophobic thin layer. (c) Fabrication principle of an array of hemispherical resonators on the hydrophobic DBR using a microplotter or inkjet technique. 
FIG. 3. (a) and (b) Spontaneous and laser emission from C540A and RhB doped cavities under optical pumping. FSR values of the hemispheres are 0.8 and 1.5 nm, respectively. The insets show optical and PL images of the corresponding hemispheres. 
FIG. 2. (a) and (b) Optical images of regular arrays of hemisphere fabricated by a microplotter with 30 and 80 lm-diameters glass needles, respectively. The structures were doped with RhB (red) and C504A (green) dyes. (c) Diameter distribution of 173 hemispheres created using the 30 lm-diameter glass needle. 
FIG. 4. Normalized PL spectra of pure donor and mixed donor-acceptor dye solutions with various ratios illuminated by Xeon lamp at wavelength of 420 nm. The inset depicts the absorption spectra of the donor and acceptor. 
FIG. 5. Lasing spectra from individual hemispheres with various donoracceptor ratios. (a) Donor lasing, (b) FRET-induced acceptor lasing, and (c) dual-colour donor and acceptor laser emission. Stop-band of the DBR used is shown in the top, which completely covers the lasing wavelength range. 
FIG. 6. Fluorescence decay curves of pure donor and donor-acceptor mixtures with various ratios detected at around 520 nm. Extracted lifetimes are shown on each curve. The inset presents energy transfer efficiency as a function of the acceptor:donor ratios.
Citations
Full-color laser displays based on organic printed microlaser arrays
TL;DR: A dynamic full- color display in which each pixel is made up of three printed organic microlasers to cover the RGB space is demonstrated, a major step towards full-color laser displays with outstanding color expression.
3D Laser Displays Based on Circularly Polarized Lasing from Cholesteric Liquid Crystal Arrays.
TL;DR: In this article, full-color 3D laser displays are demonstrated based on circularly polarized (CP) laser emissions with inkjet-printed cholesteric liquid crystal (CLC) arrays as display panels, which are realized by embedding fluorescent dyes into CLCs with their left/right-handed helical superstructures serving as distributed feedback microcavities.
189
Dual-Wavelength Switchable Vibronic Lasing in Single-Crystal Organic Microdisks.
TL;DR: The vibrationally structured fluorescence property of the single-crystal organic microdisks brings dual-wavelength lasing at different vibronic bands that point out a promising route to the rational design of miniaturized lasers and other photonic elements with desired performances.
63
Tuneable red, green, and blue single-mode lasing in heterogeneously coupled organic spherical microcavities.
TL;DR: A comprehensive understanding of the lasing modulation is provided that might lead to innovation in structure designs for photonic integration, and a system for improved control over laser light emission generates any frequency in the visible spectrum in the advantageous form known as ‘single-mode’ lasing.
Organic Printed Core–Shell Heterostructure Arrays: A Universal Approach to All-Color Laser Display Panels
TL;DR: In this article, a universal approach is demonstrated for realizing dual-wavelength lasing in organic core-shell structured microlaser arrays, which show great promise in serving as all-color laser display panels.
49
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