Results 41 to 50 of about 263,956 (158)

AB-INITIO CALCULATION OF TWO-PHOTON ABSORPTION FOR SEMICONDUCTORS [PDF]

, 2022
"A theoretical derivation of two-photon absorption (2PA) from bulk, surface and 2 dimensional (2D) semiconductors, based on the length gauge analysis and the electron density operator, is formulated; the intraband r_i part and the interband r_e part of ...
ALAN BERNAL
core  

Defect state enhanced nonlinear absorption and optical limiting behaviour of erbium doped silver molybdate nanostructures

Scientific Reports
Transition metal based optical limiting materials have garnered significant attention due their crucial role in protecting sensitive optical system from high intense laser damage.
B. Binish, K. Mani Rahulan, T. C. Sabari Girisun, Nisha S. Panicker   +3 more
doaj   +1 more source

GENERAL STUDY OF CLASSICAL AND NONCLASSICAL CONTRIBUTIONS OF TWO PHOTON ABSORPTION PROCESS IN ORGANIC MOLECULES [PDF]

, 2023
"Two-photon absorption (TPA), a nonlinear optical phenomenon, is gaining attention for applications like laser scanning, microscopy, and therapy. Recent research explores entangled two photon absorption (ETPA) using correlated photons but faces debates ...
Freiman Estiven Triana Arango
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Linear and Nonlinear Photon-Induced Cross Bridge/Space Charge Transfer in STC Molecular Crystals

Nanomaterials, 2022
In this work, we theoretically studied the optical absorption properties of a layer-stacked cocrystal heterogeneous material Spe-TCNB cocrystal (STC) which is produced by supramolecular self-assembly of organic conjugated monomers SPE and TCNB.
Chen Lu, Jing Yu, Hao Sheng, Yongjian Jiang, Fengyang Zhao, Jingang Wang   +5 more
doaj   +1 more source

Two-photon-induced photoconductivity enhancement in semiconductor microcavities: a theoretical investigation [PDF]

, 2002
We describe a detailed theoretical investigation of two-photon absorption photoconductivity in semiconductor microcavities. We show that high enhancement (by a factor of >10, 000) of the nonlinear response can be obtained as a result of the microcavity ...
Folliot, H., Krug, T., Barry, Liam P., Dunbar, L.A., Hegarty, J., Lynch, Michael, Donegan, John Francis, Bradley, Ann Louise   +7 more
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Ge-on-Si single-photon avalanche diode detectors: design, modeling, fabrication, and characterization at wavelengths 1310 and 1550 nm [PDF]

, 2013
The design, modeling, fabrication, and characterization of single-photon avalanche diode detectors with an epitaxial Ge absorption region grown directly on Si are presented.
Lever, LJM, Paul, D.J., Buller, GS, Ikonic, Zoran, Warburton, Ryan E, Ikonic, Z, Myronov, Maksym, Knights, AP, Leadley, D. R. (David R.), Gallacher, Kevin, Kelsall, Robert W., Pilgrim, Neil J, Pilgrim, NJ, Paul, DJ, Myronov, M., Paul, Douglas J. (Professor of Semiconductor Devices), Allred, P, Intermite, G., Leadley, David R, Huante-Ceron, E, Kelsall, RW, Lever, Leon J M, Pilgrim, Neil J., Kelsall, R.W., Allred, P., Myronov, M, Huante-Ceron, Edgar, Lever, Leon J. M., Lever, L.J.M., Leadley, D.R., Knights, A.P., Knights, Andrew P., Allred, Phil, Ikonic, Z., Huante-Ceron, E., Warburton, RE, Knights, Andrew P, Pilgrim, N.J., Buller, G.S., Intermite, G, Paul, Douglas J, Warburton, Ryan E., Leadley, DR, Intermite, Giuseppe, Gallacher, K, Warburton, R.E., Buller, G. S. (Gerald S.), Kelsall, Robert W, Buller, Gerald Stuart   +48 more
core   +1 more source

Enhancing entangled two-photon absorption of Nile Red via temperature-controlled SPDC

APL Quantum
Entangled two-photon absorption can enable linear scaling of fluorescence emission with the excitation power. In comparison with classical two-photon absorption with quadratic scaling, this can allow fluorescence imaging or photolithography with a high ...
Aleksa Krstić, Tobias Bernd Gäbler, Nitish Jain, Patrick Then, Valerio Flavio Gili, Sina Saravi, Frank Setzpfandt, Christian Eggeling, Markus Gräfe   +8 more
doaj   +1 more source

Photon Pair Source based on PPLN‐Waveguides for Entangled Two‐Photon Absorption

Advanced Physics Research
Fluorescence excitation by absorption of entangled photon pairs offers benefits compared to classical imaging techniques, such as the attainment of higher signal levels at low excitation power while simultaneously mitigating phototoxicity.
Tobias Bernd Gäbler, Patrick Hendra, Nitish Jain, Markus Gräfe   +3 more
doaj   +1 more source

New Fluorescent Porphyrins with High Two-Photon Absorption Cross-Sections Designed for Oxygen-Sensitization: Impact of Changing the Connectors in the Peripheral Arms

Photochem, 2023
In the continuation of our sustained interest in porphyrin-based dendrimers and their use as luminescent photosensitizers for two-photon photodynamic therapy (2P-PDT), we wondered about the effect of changing the connectors in our macromolecular ...
Limiao Shi, Zhipeng Sun, Nicolas Richy, Olivier Mongin, Mireille Blanchard-Desce, Frédéric Paul, Christine O. Paul-Roth   +6 more
doaj   +1 more source

Two-Photon Absorption and Two-Photon-Induced Gain in Perovskite Quantum Dots

, 2018
Perovskite quantum dots (PQDs) emerged as a promising class of material for applications in lighting devices, including light emitting diodes and lasers. In this work, we explore nonlinear absorption properties of PQDs showing the spectral signatures and
Ana F. Nogueira (1480996), Andrew A. R. Watt (1627966), Lazaro A. Padilha (1272237), Zhanet Zaharieva (5375570), Jaqueline O. Rocha (5375573), Luiz G. Bonato (3104088), Carlos H. de Brito Cruz (5375576), Gabriel Nagamine (3104085)   +7 more
core   +1 more source