Zobrazeno 1 - 10
of 97
pro vyhledávání: '"H. Ramachandra"'
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 28:1-8
A fully-functional photonic integrated circuit (PIC) platform with supporting active and passive components in the green part of the visible spectral regime is of significant research interest for next-generation optical systems. Here we design highl
Autor:
Mohammad H. Awwad, Weicheng You, Riazul Arefin, Shamsul Arafin, Hyemin Jung, Sujit H. Ramachandra, Syed M. N. Hasan
Publikováno v:
IEEE Journal of Quantum Electronics. 56:1-10
Electrically-pumped AlGaN-based edge-emitting laser diodes with a buried tunnel junction (TJ) for sub-300 nm emission are designed in this paper. Hole injection is one of the major concerns for the design of ultraviolet (UV) lasers based on this mate
Autor:
Sarvagya Dwivedi, Weicheng You, Henryk Turski, Syed M. N. Hasan, Shamsul Arafin, Riazul Arefin, Hyemin Jung, Sujit H. Ramachandra
Publikováno v:
IEEE Journal of Quantum Electronics. 56:1-9
In this paper, we report a low-loss photonic integrated circuits (PICs) platform at blue wavelengths of the visible spectral regime. Silicon nitride (SiN) is a popular passive waveguide material due to its fabrication flexibility, CMOS compatibility
Autor:
Swamy, H. Ramachandra, Proctor, John
Publikováno v:
Global Ecology and Biogeography Letters, 1994 Sep 01. 4(5), 155-165.
Externí odkaz:
https://www.jstor.org/stable/2997533
Autor:
Swamy, H. Ramachandra, Proctor, J.
Publikováno v:
Global Ecology and Biogeography Letters, 1994 Sep 01. 4(5), 140-154.
Externí odkaz:
https://www.jstor.org/stable/2997532
Publikováno v:
OSA Advanced Photonics Congress 2021.
Nonlinear photonic integrated circuits at green wavelengths with on-chip pump lasers and hybrid waveguides are designed. The calculated nonlinear mode overlap factor and maximum laser-to-waveguide coupling efficiency are 26% and -2.3 dB, respectively
Autor:
Swamy, H. Ramachandra, Proctor, John
Publikováno v:
Journal of Tropical Forest Science, 1997 Sep 01. 10(1), 73-85.
Externí odkaz:
https://www.jstor.org/stable/43582194
Autor:
Sarvagya Dwivedi, Riazul Arefin, Syed M. N. Hasan, Weicheng You, Hyemin Jung, Sujit H. Ramachandra, Shamsul Arafin
Publikováno v:
Conference on Lasers and Electro-Optics.
Photonic integration of GaN and Si-SiN platforms at the shortest visible wavelength is reported. Maximum theoretical coupling efficiencies up to 51% and 24% for a vertical grating coupler (fiber-chip) and hybrid integration, respectively, are achieve
Publikováno v:
Optical Materials. 107:110115
In the current article, strontium titanate (ST) phosphor material doped with 1–9 mol% samarium ion (Sm3+) is prepared by facile solution combustion route. Characterizations for the prepared sample was carried out via powder X-ray diffraction, scann
Publikováno v:
IEEE Transactions on Dielectrics and Electrical Insulation. 22:2786-2797
Presence of sulphur compounds in mineral transformer oil poses serious problems of corrosion of copper conductors. Thermal degradation of sulphur compounds like DBDS, 2- mercaptobenzothiozole and depletion of metal passivators like Irgamet 39 and BTA