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2025
Volume: 2 Issue 3
2 Article(s)
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Laser and Laser Physics
Micromanipulation with Generalized Perfect Optical Vortex (Invited)
Wenyu Gao, Yuan Zhou, Xing Li, Qiang Zhang... and Baoli Yao|Show fewer author(s)
Optical vortices have demonstrated significant potential in diverse applications, including particle micromanipulation, optical communication, and optical imaging. Among these, the generalized perfect optical vortex (GPOV) has emerged as a focal area of research due to its highly customizable intensity profiles and beaOptical vortices have demonstrated significant potential in diverse applications, including particle micromanipulation, optical communication, and optical imaging. Among these, the generalized perfect optical vortex (GPOV) has emerged as a focal area of research due to its highly customizable intensity profiles and beam radius that remain independent of topological charges. These attributes have established GPOV as a versatile tool in advanced optical micromanipulation. In this paper, we employ blazed grating technology to enhance the generation of GPOV and integrate them into manipulation experiments involving polystyrene fluorescent microspheres. Through theoretical and experimental validation, we demonstrate the feasibility and precision of transporting particles along customizable paths. This research advances the integration of light field modulation and optical micromanipulation, paving the way for potential applications in microscale delivery systems..
Acta Optica Sinica (Online)
- Publication Date: Feb. 10, 2025
- Vol. 2, Issue 3, 0306001 (2025)
Photonic and Optoelectronic Devices
Research Progress on High-Efficiency Narrowband Blue OLEDs Enabled by Multiple-Boron Effect (Invited)
Jianxin Tang, Guowei Chen, Zhen Zhang, Yihui He... and Yanqing Li|Show fewer author(s)
Multiple-resonance thermally activated delayed fluorescence (MR-TADF) materials have advantages such as narrowband emission, small singlet-triplet energy level differences, and large molar extinction coefficients. These characteristics enable a combination of high efficiency and high color purity, granting these materiMultiple-resonance thermally activated delayed fluorescence (MR-TADF) materials have advantages such as narrowband emission, small singlet-triplet energy level differences, and large molar extinction coefficients. These characteristics enable a combination of high efficiency and high color purity, granting these materials significant application potential in ultra-high-definition displays. Consequently, they have gained widespread attention. Since the first MR-TADF material was reported in 2016, this field has witnessed rapid advancements. However, blue MR-TADF materials with higher energy levels often suffer from poor carrier injection and transport capabilities, limiting their performance in terms of efficiency and color purity. MR-TADF materials with multi-boron structures, owing to their multiple electron-deficient boron atoms, enhance electronic delocalization and molecular orbital overlap and coupling. This suppresses non-radiative transitions and improves emission efficiency. Moreover, the increased molecular rigidity and multi-resonance effects reduce vibrational and rotational energy level distributions in the excited state, resulting in narrower full width at half maximum (FWHM) emissions. Consequently, these materials have emerged as a prominent choice for constructing deep blue organic emissive materials, driving significant progress in this field. In this paper, we comprehensively explore recent advances in blue MR-TADF materials with multi-boron structures, focusing on molecular design, photophysical properties, and optoelectronic performance in organic light-emitting diodes (OLEDs). By clarifying the relationship between molecular structure and performance, we aim to provide valuable guidance for future research. Finally, we present perspectives on the future development of blue boron-containing MR-TADF materials..
Acta Optica Sinica (Online)
- Publication Date: Feb. 10, 2025
- Vol. 2, Issue 3, 0302001 (2025)
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