Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Lukasz Brzozowski"'
Autor:
John B. Asbury, Larissa Levina, Huan Liu, Edward H. Sargent, Andrew W. Schaefer, Kyle W. Kemp, Ratan Debnath, Lukasz Brzozowski, Sjoerd Hoogland, Jihye Kim, Jiang Tang, Xihua Wang, Kwang Seob Jeong
Publikováno v:
ACS Nano. 6:89-99
Colloidal quantum dot (CQD) photovoltaics offer a promising approach to harvest the near-IR region of the solar spectrum, where half of the sun's power reaching the earth resides. High external quantum efficiencies have been obtained in the visible r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a49a41909817eb5ae2aaf1caf7b1b194
https://doi.org/10.1021/nn2039164
https://doi.org/10.1021/nn2039164
Autor:
Illan J. Kramer, Ghada I. Koleilat, Sjoerd Hoogland, Edward H. Sargent, Larissa Levina, Jiang Tang, Ratan Debnath, Huan Liu, Xihua Wang, D. Aaron R. Barkhouse, Lukasz Brzozowski
Publikováno v:
Nature Photonics. 5:480-484
Researchers report a colloidal quantum-dot solar cell that features two junctions, each designed to absorb and convert different spectral bands of light within the solar spectrum. The device offers a power conversion efficiency of 4.2% and an open ci
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aaa93564ef9f20a1562052294cfb114b
https://doi.org/10.1038/nphoton.2011.123
https://doi.org/10.1038/nphoton.2011.123
Autor:
David J. Hagan, Peter D. Olszak, Scott Webster, Larissa Levina, Vlad Sukhovatkin, Lazaro A. Padilha, Gero Nootz, Edward H. Sargent, Lukasz Brzozowski, Eric W. Van Stryland
Publikováno v:
Nano Letters. 10:3577-3582
The influence of quantum confinement on the one- and two-photon absorption spectra (1PA and 2PA) of PbS and PbSe semiconductor quantum dots (QDs) is investigated. The results show 2PA peaks at energies where only 1PA transitions are predicted and 1PA
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04bfb72835fefa27a18c17acd545071e
https://doi.org/10.1021/nl1018673
https://doi.org/10.1021/nl1018673
Autor:
Arundhuti Ganguly, Robert Bennett, Lukasz Brzozowski, Mihaela Pop, Zhifei Wen, Rebecca Fahrig, John A. Rowlands
Publikováno v:
Medical Physics. 33:3033-3045
A next-generation interventional guidance system is proposed that will enable intraprocedural access to both x-ray and magnetic resonance imaging (MRI) modalities. This closed bore XMR (CBXMR) system is comprised of a conventional radiographic rotati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::116bd1ed94f5a1ea0cc44e839a0fa82a
https://doi.org/10.1118/1.2219328
https://doi.org/10.1118/1.2219328
Publikováno v:
IEEE Journal of Quantum Electronics. 39:924-930
The intensity-dependent response of nonlinear Bragg-periodic epitaxially-grown InGaAs-InAlGaAs-based optical elements is reported over a broad spectral range 1.3-1.6 /spl mu/m. Large changes in the transmittance and reflectance are observed as a func
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4893b13dd5df8412a1b734fcd1d06458
https://doi.org/10.1109/jqe.2003.813195
https://doi.org/10.1109/jqe.2003.813195
Autor:
Lukasz Brzozowski, Edward H. Sargent
Publikováno v:
Journal of Materials Science: Materials in Electronics. 12:483-489
We review the third-order nonlinear performance of pseudo-stilbene type azobenzenes with an eye to application in ultrafast optical signal processing. We discuss mechanisms responsible for the nonlinear response of the azobenzenes. By aggregating exp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::048e8f40dbed77d1ec0f5c25db65808a
https://doi.org/10.1023/a:1012446007088
https://doi.org/10.1023/a:1012446007088
Autor:
E.H. Sargent, Lukasz Brzozowski
Publikováno v:
IEEE Journal of Quantum Electronics. 36:1237-1242
We analyze broad-band limiting behavior in nonlinear structures that are, on average, periodic. Introduction of a controlled degree of randomness in layer thicknesses results in widening of the stopband. Light at all of the frequencies in this broade
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6aea25035a704cfe44470acf395dd32
https://doi.org/10.1109/3.890262
https://doi.org/10.1109/3.890262
Autor:
Lukasz Brzozowski, Edward H. Sargent
Publikováno v:
IEEE Journal of Quantum Electronics. 36:550-555
We analyze the optical signal processing functionality of periodic structures consisting of alternating layers of materials possessing opposite Kerr nonlinearities. By elaborating an analytical model and employing numerical simulations, we explore th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af091cd29236214aef6d4fe46bdea80c
https://doi.org/10.1109/3.842096
https://doi.org/10.1109/3.842096
Publikováno v:
Science. 324:1542-1544
Reaping Gain from Decay In photovoltaic devices, absorbed light excites electrons into a conduction band and thereby initiates electric current flow. Unfortunately, if the energy of the incident photons exceeds the threshold for this excitation (the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68b3e740b02910c5ba1037eb500b8286
https://doi.org/10.1126/science.1173812
https://doi.org/10.1126/science.1173812
Publikováno v:
Applied Physics Letters. 82:4429-4431
Direct picosecond measurements of nonlinear refractive index change and nonlinear absorption in In0.530Al0.141Ga0.329As/In0.530Ga0.470As multiquantum wells in the range 1480–1550 nm are reported. Large low-threshold nonlinear index changes are foun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30f299a458209d06b3ed7cb33c32b39c
https://doi.org/10.1063/1.1585130
https://doi.org/10.1063/1.1585130