Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Felipe Vallini"'
Autor:
Hung-Hsi Lin, Rajat Sharma, Alex Friedman, Benjamin M. Cromey, Felipe Vallini, Matthew W. Puckett, Khanh Kieu, Yeshaiahu Fainman
Publikováno v:
APL Photonics, Vol 4, Iss 3, Pp 036101-036101-6 (2019)
We present experimental results on second-harmonic generation in non-stoichiometric, silicon-rich nitride films. The as-deposited film presents a second-order nonlinear coefficient, or χ(2), as high as 8 pm/V. This value can be widely tuned using th
Externí odkaz:
https://doaj.org/article/e135adbd532a464fb17d78a1ef116aa6
Publikováno v:
IEEE Photonics Journal, Vol 4, Iss 4, Pp 1115-1123 (2012)
We have fabricated highly luminescent samples with erbium-doped amorphous silicon suboxide $(a\hbox{-SiO}_{x} \langle \hbox{Er}\rangle)$ layers on $\hbox{SiO}_{2}/\hbox{Si}$ substrates. The layers are designed to provide a resonance with large modal
Externí odkaz:
https://doaj.org/article/8e5236c22043402c972470ff8c247431
Publikováno v:
IEEE Photonics Journal, Vol 5, Iss 6, Pp 2202717-2202717 (2013)
Photonic systems based on microring resonators have a fundamental constraint given by the strict relationship among free spectral range, total quality factor QT , and resonator size, intrinsically making filter spacing, photonic lifetime, and footpri
Externí odkaz:
https://doaj.org/article/2007bfc38b3f49f19694856b46288d6a
Publikováno v:
Journal of Integrated Circuits and Systems. 7:87-91
A study of damages caused by gallium focused ion beam (FIB) into III-V compounds is presented. Potential damages caused by local heating, ion implantation, and selective sputtering are presented. Preliminary analyzes shows that local heating is negli
Publikováno v:
Nature Photonics. 13:431-435
Space-variant control of optical wavefronts is important for many applications in photonics, such as the generation of structured light beams, and is achieved with spatial light modulators. Commercial devices, at present, are based on liquid-crystal
Autor:
Felipe Vallini, Suruj S. Deka, Yeshaiahu Fainman, Abdelkrim El Amili, Sizhu Jiang, Si Hui Pan, Qing Gu
Publikováno v:
Optics express. 28(19)
To realize ubiquitously used photonic integrated circuits, on-chip nanoscale sources are essential components. Subwavelength nanolasers, especially those based on a metal-clad design, already possess many desirable attributes for an on-chip source su
Publikováno v:
IEEE Journal of Selected Topics in Quantum Electronics. 23:1-6
Extremely compact nanoscale devices such as electrically pumped nanolasers are difficult to operate at room temperature due to the high electrical resistance inherent to small cavities. As a consequence, large voltages are necessary to reach the lasi
Autor:
Babak Bahari, Abdoulaye Ndao, Felipe Vallini, Abdelkrim El Amili, Yeshaiahu Fainman, Boubacar Kanté
Publikováno v:
Science. 358:636-640
Resonant cavities are essential building blocks governing many wave-based phenomena, but their geometry and reciprocity fundamentally limit the integration of optical devices. We report, at telecommunication wavelengths, geometry-independent and inte
Autor:
Felipe Vallini, Jari Lyytikäinen, Si Hui Pan, Antti Tukiainen, Gustav Nylund, Mircea Guina, Cheng-Yi Fang, Abdelkrim El Amili, Boubacar Kante, Yeshaiahu Fainman
Publikováno v:
Optics letters. 44(15)
We experimentally demonstrate the lasing action of a new nanolaser design with a tunnel junction. By using a heavily doped tunnel junction for hole injection, we can replace the p-type contact material of a conventional nanolaser diode with a low-res
Autor:
Thomas Lepetit, Ashok Kodigala, Ricardo Tellez-Limon, Boubacar Kante, Yeshaiahu Fainman, Felipe Vallini, Jun-Hee Park, R. Contractor, Babak Bahari
Publikováno v:
Frontiers in Optics + Laser Science APS/DLS.
Using wave singularities known as bound states in continuum, we report an integrated device that simultaneously generates and directs coherent beams carrying orbital angular momentum.