Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Denis V"'
Autor:
Mansoor Sheik-Bahae, Seth D. Melgaard, Denis V. Seletskiy, Alexander R. Albrecht, Jeffrey G. Cedeberg, Mohammadreza Ghasemkhani
Publikováno v:
SPIE Proceedings.
Laser cooling of solids has great potential to achieve an all-solid-state optical cryo-cooler. The advantages of compactness, no vibrations, no moving parts or fluids, and high reliability have motivated intensive research. Increasing the pump power
Autor:
Denis V. Seletskiy, Jeffrey G. Cederberg, Mohammadreza Ghasemkhani, Seth D. Melgaard, Alexander R. Albrecht, Mansoor Sheik-Bahae
Publikováno v:
SPIE Proceedings.
We report on the use of a high power InGaAs quantum well vertical external-cavity surface-emitting laser (VECSEL) emitting at a wavelength of 1020 nm for intra-cavity cooling of a 5% Yb-doped YLF crystal to 148 K from room temperature. Similar crysta
Autor:
Denis V. Seletskiy, Mauro Tonelli, Alberto Di Lieto, Alexander R. Albrecht, Mansoor Sheik-Bahae, Jerome V. Moloney, Ganesh Balakrishnan, Jeffrey G. Cederberg
Publikováno v:
SPIE Proceedings.
We report on the first observation of intracavity laser cooling inside of a vertical external-cavity surface-emitting laser (VECSEL). A Yb:YLF crystal is placed under Brewster angle inside the cavity of an InGaAs quantum well VECSEL emitting around 1
Autor:
François Léonard, Aaron M. Katzenmeyer, Chia-Yeh Li, Maria Eugenia Toimil-Molares, Denis V. Seletskiy, Jeffrey G. Cederberg, A. Alec Talin, Mansoor Sheik-Bahae, Michael P. Hasselbeck
Publikováno v:
SPIE Proceedings.
InAs nanowires have been previously shown to be efficient emitters of THz radiation, upon excitation with NIR pulses. In this work we report complementary measurements of THz radiation and reflectometry together with DC transport measurements that po
Publikováno v:
SPIE Proceedings.
In this paper we review our recent progress in development of a ytterbium doped yttrium-lithium fluoride cryocooler. Preliminary modeling results are presented that indicate requirements on the material parameters to reach sub-100 K temperatures.
Autor:
Mauro Tonelli, Denis V. Seletskiy, Seth D. Melgaard, Alberto DiLieto, Mansoor Sheik-Bahae, Stefano Bigotta
Publikováno v:
SPIE Proceedings.
We demonstrate cooling of a 2 micron thick GaAs/InGaP double-heterostructure to 165 K from ambient using an all-solid-state optical refrigerator. Cooler is comprised of Yb 3+ -doped YLF crystal, pumped by 9 Watt near E4-E5 Stark manifold transition.
Autor:
J. G. Cederberg, Michael P. Hasselbeck, A. Alec Talin, Denis V. Seletskiy, Mansoor Sheik-Bahae
Publikováno v:
SPIE Proceedings.
We report the first observation of coherent plasmon emission of THz radiation from arrays of semiconductor nanowires. The THz signal strength from InAs nanowires is comparable to a planar substrate, indicating the nanowires are highly efficient emitt
Publikováno v:
SPIE Proceedings.
We discuss a cavity enhanced resonant absorption (CERA) approach for increasing optical pump absorption. This is demonstrated in the context of laser cooling of solids, where the absorption in ytterbium (Yb+3) ion is increased by over an order of mag
Publikováno v:
SPIE Proceedings.
This work contains the results of the investigation of dissolution of SiO2 after the implantation by Ar+ and C+ ions with the irradiation energy of several tens of keV. The measurements were carried out directly in the liquid in-situ with an atomic f