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Organic Printed Core-Shell Heterostructure Arrays: A Universal Approach to All-Color Laser Display Panels
摘要： We demonstrate a universal approach for realizing dual-wavelength lasing in organic core-shell structured microlaser arrays, which show great promise in serving as all-color laser display panels. By alternately printing hydrophilic and hydrophobic laser dye solutions on preprocessed substrates, we successfully obtained precisely patterned core-shell heterostructure arrays. The spatially-separated core and shell independently function as optical resonators to support dual-wavelength tunable microlasers in each heterostructure. Such a general method enables to flexibly control the lasing wavelength of the core-shell microlasers across a wide spectral range by systematically designing the gain media. Using as-prepared microlaser arrays as display panels, we achieved full-color laser displays, representing an achievable color gamut much larger than that of standard RGB space. These results may provide new insights for design concepts and device construction for novel optoelectronic applications.
关键词： organic heterostructure,laser display,dual-wavelength laser,core-shell structure,laser array
更新于2025-09-23 15:21:01
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Organic Printed Core-Shell Heterostructure Arrays: A Universal Approach to All-Color Laser Display Panels
摘要： We demonstrate a universal approach for realizing dual-wavelength lasing in organic core-shell structured microlaser arrays, which show great promise in serving as all-color laser display panels. By alternately printing hydrophilic and hydrophobic laser dye solutions on preprocessed substrates, we successfully obtained precisely patterned core-shell heterostructure arrays. The spatially-separated core and shell independently function as optical resonators to support dual-wavelength tunable microlasers in each heterostructure. Such a general method enables to flexibly control the lasing wavelength of the core-shell microlasers across a wide spectral range by systematically designing the gain media. Using as-prepared microlaser arrays as display panels, we achieved full-color laser displays, representing an achievable color gamut much larger than that of standard RGB space. These results may provide new insights for design concepts and device construction for novel optoelectronic applications.
关键词： laser display,organic heterostructure,core-shell structure,dual-wavelength laser,laser array
更新于2025-09-23 15:19:57
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Speckle evaluation in laser display: From speckle contrast to speckle influence degree
摘要： Speckle contrast (SC) is universally used to evaluate speckle in laser display, which has virtues of briefness in calculating and definitude in physical meaning. But the results characterized by SC is usually inconsistent with human visual perception. In this study, an alternative framework for speckle evaluation, speckle influence degree (SID), is developed. It considers the effects of SC, sampling rate, and image resolution on perceived speckle by human eyes. Theoretical analysis is firstly conducted. Then, speckle images of different sampling rate, SC, and image resolution are generated and calculated. Finally, SID is shown to be a more comprehensive metric that could characterize the influence of sampling rate and image resolution and that is better matched with subjective perception of human eyes than SC.
关键词： Speckle evaluation,Human visual perception,Laser display,Speckle,Speckle influence degree
更新于2025-09-12 10:27:22
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21.1: <i>Invited Paper:</i> Optical Radiation Safety Analysis for Laser Used as Illumination Products
摘要： Illumination products using laser source have plenty of advantages, such as high conversion efficiency, more brightness, wide color gamut, long life and so on. However, due to the high energy density of laser, the optical radiation safety of laser used as illumination products should be studied and analyzed. First of all, the characteristics, advantages of laser used as illumination products are introduced. Then the international and national organizations, such as IEC/TC 76, IEC/TC 108, SAC/TC 284, are surveyed. In addition, standards and the corresponding relations related to laser used as illumination products are reviewed, especially for safety of laser products (IEC 60825) series standards, photobiological safety of lamps and lamp systems (IEC 62741) series standards, Audio/video, information and communication technology equipment–Part 1: Safety requirements (IEC 62368-1:2018), as well as ICNIRP guidelines. Finally, optical radiation safety of some specific illumination products using lasers are discussed.
关键词： optical radiation safety,laser illumination,laser display,laser source
更新于2025-09-11 14:15:04
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P‐15.3: The Importance of Centroid Wavelength for the Image Quality Evaluation of Laser Displays
摘要： The accuracy of a measurement method for the chromaticity and photometric quantity of laser displays using centroid wavelengths was experimentally verified. This method allows more accurate optical evaluation of laser displays in principle than the method using peak wavelengths which has been commonly known in the laser industry.
关键词： Chromaticity,Tristimulus Values,Peak Wavelength,Colorimetry,Laser,Laser Display,Radiometric Quantity,Centroid Wavelength,Photometric Quantity,Photometry
更新于2025-09-11 14:15:04
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P‐15.2: A Study for Easy and Quick White Balance Adjustment in Laser Display Production
摘要： White balance adjustment is crucially important but time-consuming work in display production. In this paper, we point out challenges in white balance adjustment process and discuss how they can be resolved using the Discrete Centroid Wavelength Method, which was newly developed for laser-display measurement.
关键词： Chromaticity,Tristimulus Values,Colorimetry,Laser,Optical Power,Laser Display,White Balance Adjustment,Centroid Wavelength,Photometric Quantity,Photometry,Power Meter
更新于2025-09-11 14:15:04
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Micro‐ and Nanolasers
摘要： A laser is a device that emits strong coherent light through a process of light amplification by stimulated emission of radiation. The theoretical foundation for the laser was established by Albert Einstein theorizing on the existence of stimulated emission in 1916. The first laser was built by Theodore Maiman in 1960 based on the theoretical work of Charles Townes and Arthur Schawlow. The invention and continuous development of the laser has revolutionized science, technology, and industry. Miniaturization of lasers has been promoting the development and application of laser technology. For example, compact semiconductor lasers have become an integral part of our everyday life. With the development of micro- and nanofabrication technology, including both top-down and bottom-up techniques, the dimensions of lasers have been shrunk down to micro- and nanoscale. With an unprecedented ability to deliver intense coherent light at (sub)wavelength scale, such micro- and nanolasers are promising to trigger the next revolution in the laser and related fields. Indeed, the micro- and nanolasers are or will be unlocking their potential in photonic and optoelectronic applications, such as chemical and biological sensing, laser display and holography, on-chip optical communication and processing, and so on.
关键词： micro- and nanolasers,on-chip optical communication and processing,chemical and biological sensing,photonic and optoelectronic applications,laser display and holography
更新于2025-09-11 14:15:04