Highly Polarization-Deep-Ultraviolet-Sensitive β-Ga<sub>2</sub>O<sub>3</sub> Epitaxial Films by Disrupting Rotational Symmetry and Encrypted Solar-Blind Optical Communication Application

Wu, Chao; Zhang, Guang; Jia, Jinhua; Hu, Haizheng; Wu, Fengmin; Wang, Shunli; Guo, Daoyou

doi:10.1021/acs.jpclett.4c00561

Cited by 35 publications

(2 citation statements)

References 27 publications

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“…Several low-dimensional materials with intrinsic optical anisotropy have been developed as an optional alternative. , Two-dimensional (2D) semiconductor sheets are sensitive to polarized light due to the anisotropic structure within their crystals. − For example, Yuan explored layered black phosphorus transistors to achieve polarized light response over a wide spectral range . Yang developed polarized photodetectors in the short-wavelength region using GeSe 2 flakes .…”

Section: Introductionmentioning

confidence: 99%

Template-Confined Oriented Perovskite Nanowire Arrays Enable Polarization Detection and Imaging

Lu,

Li,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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Polarized light detection can effectively identify the difference between the polarization information on the target and the background, which is of great significance for detection in complex natural environments and/or extreme weather. Generally, polarized light detection inevitably relies on anisotropic structures of photodetector devices, while organic−inorganic hybrid perovskites are ideal for anisotropic patterning due to their simple and efficient preparation by solution method. Compared to patterned thin films, patterned arrays of aligned one-dimensional (1D) perovskite nanowires (PNWAs) have fewer grain boundaries and lower defect densities, making them well suited for high-performance polarization-sensitive photodetectors. Here, we fabricated PNWAs crystallographically aligned with variable line widths and alignment densities employing CD-ROM and DVD-ROM grating pattern template-confined growth (TCG) methods. The photodetectors constructed from MAPbI 3 PNWAs achieved responsivity of 35.01 A/W, detectivity of 6.85 × 10 13 Jones, and fast response with a rise time of 172 μs and fall time of 114 μs. They were successfully applied to high-performance polarization detection with a polarization ratio of 1.81, potentially applicable in polarized light detection systems.

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Section: Introductionmentioning

confidence: 99%

Template-Confined Oriented Perovskite Nanowire Arrays Enable Polarization Detection and Imaging

Lu,

Li,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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“…This is because GaN-based APDs can eliminate the need for expensive optical filters and considerably improve system integration and reliability. Recently, some sun-blind UV communication systems have also been proposed [ 14 ]. GaN-based APDs show the potential to achieve bandwidths as high as 62.9 GHz [ 15 ], which offers the potential advantage of high bandwidth and demonstrates a unique benefit for application in optical communication systems.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Linearity of Light Response in Avalanche Photodiodes by Suppressing Electrode Size Effect

Gan,

Yu,

Wang

2024

Sensors

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The nonlinear characteristics of avalanche photodiodes (APDs) inhibit their performance in high-speed communication systems, thereby limiting their widespread application as optical detectors. Existing theoretical models have not fully elucidated complex phenomena encountered in actual device structures. In this study, actual APD structures exhibiting lower linearity than their ideal counterparts were revealed. Simulation analysis and physical inference based on GaN APDs reveal that electrode size is a noteworthy factor influencing response linearity. This discovery expands the nonlinear theory of APDs, suggesting that APD linearity can be enhanced by suppressing the electrode size effect. A physical model was developed to explain this phenomenon, which is attributed to charge accumulation at the edge of the contact layer. Therefore, we proposed an improved APD design that incorporates an additional gap layer and a buffer layer to stabilize the internal gain under high-current-density conditions, thereby enhancing linearity. Our improved APD design increases the linear threshold for optical input power by 4.46 times. This study not only refines the theoretical model for APD linearity but also opens new pathways for improving the linearity of high-speed optoelectronic detectors.

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β‐Ga₂O₃ Nanoribbon with Ultra‐High Solar‐Blind Ultraviolet Polarization Ratio

Zhao,

Yang,

Wang

et al. 2024

Advanced Materials

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Solar‐blind ultraviolet (UV) detection plays a critical role in imaging and communication due to its low‐noise background, high signal‐to‐noise ratio, and strong anti‐interference capabilities. Detecting the polarization state of UV light can enhance image information and expand the communication dimension. Although polarization detection is explored in visible and infrared light, and applied in fields such as astrophysics and submarine seismic wave detection, solar‐blind UV polarization detection remains largely unreported. This is primarily due to the challenge of creating UV polarizers with high transmittance, high extinction ratio, and strong resistance to UV radiation. In this study, it is discovered that the space symmetry breaking of the β‐Ga2O3’s b–c plane results in a significant optical absorption dichroic ratio. Leveraging β‐Ga2O3’s high solar‐blind UV response, a lensless solar‐blind UV polarization‐sensitive photodetector, circumventing the challenges associated with solar‐blind UV polarizers is designed. This photodetector exhibits an exceptionally high intrinsic polarization ratio under 254 nm linearly polarized light, approximately two orders of magnitude higher than other reported nanomaterial‐based polarization‐sensitive photodetectors. Additionally, it demonstrates significant advantages in solar‐blind UV imaging and light communication. This work introduces a novel strategy for solar‐blind ultraviolet polarization detection and offers a promising approach for solar‐blind light communication.

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Highly Polarization-Deep-Ultraviolet-Sensitive β-Ga₂O₃ Epitaxial Films by Disrupting Rotational Symmetry and Encrypted Solar-Blind Optical Communication Application

Cited by 35 publications

References 27 publications

Template-Confined Oriented Perovskite Nanowire Arrays Enable Polarization Detection and Imaging

Template-Confined Oriented Perovskite Nanowire Arrays Enable Polarization Detection and Imaging

Enhancing Linearity of Light Response in Avalanche Photodiodes by Suppressing Electrode Size Effect

β‐Ga₂O₃ Nanoribbon with Ultra‐High Solar‐Blind Ultraviolet Polarization Ratio

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Highly Polarization-Deep-Ultraviolet-Sensitive β-Ga2O3 Epitaxial Films by Disrupting Rotational Symmetry and Encrypted Solar-Blind Optical Communication Application

Cited by 35 publications

References 27 publications

Template-Confined Oriented Perovskite Nanowire Arrays Enable Polarization Detection and Imaging

Template-Confined Oriented Perovskite Nanowire Arrays Enable Polarization Detection and Imaging

Enhancing Linearity of Light Response in Avalanche Photodiodes by Suppressing Electrode Size Effect

β‐Ga2O3 Nanoribbon with Ultra‐High Solar‐Blind Ultraviolet Polarization Ratio

Contact Info

Product

Resources

About

Highly Polarization-Deep-Ultraviolet-Sensitive β-Ga₂O₃ Epitaxial Films by Disrupting Rotational Symmetry and Encrypted Solar-Blind Optical Communication Application

β‐Ga₂O₃ Nanoribbon with Ultra‐High Solar‐Blind Ultraviolet Polarization Ratio