Results 101 to 110 of about 8,247 (230)
Design and fabrication of AlGaN-based deep-UV LED with distributed Bragg reflectors-pixel metal combined electrodes [PDF]
, 2015 由于AlGaN、AlN材料相对较高的电阻率造成深紫外发光二极管（DUVLEDs）的电流拥堵问题更为严重，通常用于改善可见光LEDs电流分布的办法并不一定适用于DUVLEDs器件。与此同时，较高的焦耳热和低内量子效率造成的非辐射热，也导致DUVLEDs的自热效应更加明显。再加之p-GaN和p-AlGaN对紫外波段光的严重吸收，以及高Al组分AlGaN材料光学各向异性显著，严重影响了DUVLEDs的出光效率。因此，在制备DUVLEDs时，需针对AlGaN材料的特殊性，对传统的器件结构加以改进。为此 ...
袁照容
core
Digitally Tunable Dispersion Controller Using Low‐Loss Silicon Nitride Multimode Waveguide Gratings
Nanophotonics, Volume 15, Issue 8, 24 April 2026.A digitally tunable dispersion controller (DTDC) using low‐loss silicon nitride multimode waveguide gratings is demonstrated. Utilizing cascaded chirped multimode waveguide gratings and Mach–Zehnder switches, the device achieves a tuning range of 0–49.72 ps/nm with 1.60 ps/nm steps over a 26‐nm bandwidth.
Weihan Wang +9 more
wiley +1 more source
Detection and Quantification of Dysprosium in Plant Tissues
Plant Direct, Volume 10, Issue 4, April 2026.ABSTRACT The growing demand for rare‐earth elements (REEs), particularly dysprosium (Dy), underscores the need for sustainable extraction methods. Recovery of Dy, particularly from geographically distributed waste sources, is challenging. This gap positions phytomining, a technique using plants to accumulate metals, as a promising alternative. However,
Edmaritz Hernández‐Pagán +8 more
wiley +1 more source
Collection and Inactivation Abilities of Virus Flowing in a Return Air Channel with a DUV- LED
, 2022 Kotaro Takamure +5 more
openalex +1 more source
Dynamic concentration of the triangle-free process
, 2018 The triangle-free process begins with an empty graph on n vertices and iteratively adds edges chosen uniformly at random subject to the constraint that no triangle is formed.
Bohman, Tom, Keevash, Peter
core +2 more sources
Nanoscale Research Letters, 2018 The influence of quantum-well (QW) width on electroluminescence properties of AlGaN deep ultraviolet light-emitting diodes (DUV LEDs) was studied at different temperatures.
Shuxin Tan +6 more
doaj +1 more source
IEEE Photonics Journal, 2018 In this work, we propose and optimize the sidewalls for the mesa to enhance the optical power for AlGaN-based deep ultraviolet light-emitting diodes (LEDs). We obtain the mesa with the inclined sidewalls by conducting dry etching. The optical performance
Qian Chen +8 more
doaj +1 more source
Fractal patterns in fractionated spacecraft [PDF]
, 2011 Multi spacecraft architectures have been addressed in response to the demand for flexible architectures with high reliability and reduced costs compared to traditional monolithic spacecraft.
Punzo, Giuliano
core
265nm LED mini-lidar -Theoretical Approach- [PDF]
EPJ Web of ConferencesThe LED mini-lidar is discussed to install DUV-LED device in theoretical approach. The short wavelength of 265nm is in solar blind region, and it has potential to observe the low and surface atmosphere in daytime with its handy lidar setup. In this study,
Shiina Tatsuo +3 more
doaj +1 more source