Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Madis Raukas"'
Autor:
Sean Gorsky, Ran Zhang, Abdullah Gok, Ren Wang, Kidanemariam Kebede, Alan Lenef, Madis Raukas, Luca Dal Negro
Publikováno v:
APL Photonics, Vol 3, Iss 12, Pp 126103-126103-12 (2018)
Increasing light extraction efficiency and narrowing the angular spread of light emitted from optically thick light emitting diodes (LEDs) are desirable but difficult goals to achieve. In this paper, we design, optimize, and fabricate Vogel spiral ar
Externí odkaz:
https://doaj.org/article/f392bcf0c5db4e32afb0d98dc58759b3
Publikováno v:
IEEE Photonics Journal, Vol 8, Iss 1, Pp 1-10 (2016)
The effects of 2-D hexagonal-lattice TiO2 photonic crystal layers on the directional light extraction efficiency of low-scattering (Y1-xCex)3Al5O12 (YAG:Ce 3+) ceramic converters have been investigated. The hexagonal-lattice TiO2 patterns were fabric
Externí odkaz:
https://doaj.org/article/79617a1adb324abaaffb5d878e7ad50c
Publikováno v:
IEEE Photonics Journal. 8:1-10
The effects of 2-D hexagonal-lattice TiO 2 photonic crystal layers on the directional light extraction efficiency of low-scattering (Y 1-xCe x) 3Al 5O 12 (YAG:Ce 3+) ceramic converters have been investigated. The hexagonal-lattice TiO 2 patterns were
Autor:
J. Montaner, Madis Raukas, Sean Gorsky, Alan Lenef, Wesley A. Britton, Yuyao Chen, L. Dal Negro
Publikováno v:
APL Photonics, Vol 4, Iss 11, Pp 110801-110801-13 (2019)
By leveraging the concept of isotropic stealthy hyperuniform arrays (ISHAs), in this paper, we design and experimentally demonstrate novel scattering arrays of dielectric nanoparticles, here referred to as optimized isotropic scattering arrays (OISAs
Publikováno v:
ECS Meeting Abstracts. :2044-2044
We briefly review the rationale and basic principles behind light sources based on (solid state) lasers and luminescence conversion, along with main applications and market need considerations for such sources (examples: medical, information projecti
Publikováno v:
Journal of Applied Physics. 125:173102
In this study, we report the fabrication, characterization, and modeling of a zigzag nanorod-structured graded-index antireflection coating fabricated by the oblique angle deposition (OAD) method. The optical properties of the reported coating were e
Autor:
Madis Raukas, Abdullah Gok, Sean Gorsky, Kidanemariam Kebede, Alan Lenef, Ran Zhang, Luca Dal Negro, Ren Wang
Publikováno v:
APL Photonics, Vol 3, Iss 12, Pp 126103-126103-12 (2018)
Increasing light extraction efficiency and narrowing the angular spread of light emitted from optically thick light emitting diodes (LEDs) are desirable but difficult goals to achieve. In this paper, we design, optimize, and fabricate Vogel spiral ar
Autor:
Yi Zheng, Madis Raukas, John F. Kelso, A. Linkov, Krister Bergenek, Dominik Eisert, Frank Jermann
Publikováno v:
ECS Journal of Solid State Science and Technology. 2:R3168-R3176
In the present article we briefly review some materials research aspects related to ceramic phosphors and discuss both typical characteristics as well as unique features of such optical converters. Devices with more efficiency and/or higher luminous
Publikováno v:
ECS Meeting Abstracts. :1693-1693
We briefly review the rationale and basic principles behind light sources based on (solid state) lasers and luminescence conversion, along with main applications and market need considerations for such sources (examples: medical, information projecti
Autor:
Nestor Perea-Lopez, Joseph J. Laski, Joanna McKittrick, Keith A. Klinedinst, Jan B. Talbot, David Hamby, K. C. Mishra, Madis Raukas, Gustavo A. Hirata, J. Tao
Publikováno v:
ECS Transactions. 16:123-134
We report luminescence from intra-configurational f-f transitions of Tb3+ in GaN powders and thin films deposited on sapphire substrates using metal organic vapor phase epitaxy (MOVPE) and pulsed laser deposition (PLD). The MOVPE film was grown using