Results 71 to 80 of about 379,398 (143)

Two-Photon Spectroscopy Between States of Opposite Parities

, 1995
Magnetic- and electric-dipole two-photon absorption (MED-TPA), recently introduced as a new spectroscopic technique for studying transitions between states of opposite parities, is investigated from a theoretical point of view.
A.G. Makhanek, D. Fröhlich, G.E. Stedman, J. Sztucki, J. Sztucki, J.C. G ^acon, J.C. G ^acon, J.D. Axe, Jr., J.J. Hopfield, M. Daoud, M. Daoud, M. Daoud, M. Inoue, M. Kibler, M. Kibler, M. Kibler, M.R. Kibler, R.C. Leavitt, S.K. Gayen, T.R. Bader   +19 more
core   +2 more sources

Nonlinear Absorption Response Correlated to Embedded Ag Nanoparticles in BGO Single Crystal: From Two-Photon to Three-Photon Absorption

Scientific Reports, 2018
We report on the embedded silver (Ag) nanoparticles fabricated by Ag+ ion implantation into the Bi4Ge3O12 (BGO) crystal. Localized surface plasmon resonance (LSPR) phenomenon has been observed by linear optical absorption spectrum, which is accordance ...
Rang Li, Ningning Dong, Feng Ren, Hiro Amekura, Jun Wang, Feng Chen   +5 more
doaj   +1 more source

Large nonlinear optical absorption and refraction of β-In2Se3 thin film from above to below bandgap excitation

Applied Physics Express
Nonlinear optical materials, especially two-dimensional materials, are anticipated to reveal broadband optical nonlinearity for future miniaturized photonic applications.
Dan Wu, Wen Dong, Yanqing Ge, Xueqin Cao, Mingjian Shi, Erkang Li, Nan Ma, Yixuan Zhou, Yuanyuan Huang, Chunhui Lu, Xinlong Xu   +10 more
doaj   +1 more source

Birefringence and Anisotropy of the Losses Due to Two-Photon Absorption of Femtosecond Pulses in Crystals

Photonics
It is shown that the two-photon absorption (TPA)-induced losses in a non-centrosymmetric crystal reduce considerably when the angle θ between the polarization vector of incident radiation and the optical c-axis is 45°.
Valeri Kovalev, George Krasin
doaj   +1 more source

Non-linear spectroscopy of rubidium: An undergraduate experiment

, 2009
In this paper, we describe two complementary non-linear spectroscopy methods which both allow to achieve Doppler-free spectra of atomic gases. First, saturated absorption spectroscopy is used to investigate the structure of the $5{\rm S}_{1/2}\to 5{\rm P}
A Allafort, B Hingant, Bordé C, Cagnac B, Cahuzac P, Grynberg G, Grynberg G, Grynberg G, Grynberg G, J F Roch, Letokhov V S, M Pigeard, Schalow A L, V Jacques, Vasilenko L S   +14 more
core   +1 more source

Photoswitching of the Two‐Photon Absorption of Donor‐Acceptor Substituted Dithienylethenes

ChemistryEurope
In this work the structural and electronic integration of push–pull systems with photoactivatable dithienylethenes (DTEs) is demonstrated. The light‐induced 6π‐electrocyclization of two asymmetrically substituted DTEs is used to conjugate an electron ...
Francisco G. Blandón‐Cumbreras, Marc Villabona, Julia Osmólska, Elizaveta F. Petrusevich, David B. Guzmán Ríos, Robert Zaleśny, Joanna Olesiak‐Bańska, Jordi Hernando, Uwe Pischel   +8 more
doaj   +1 more source

New bodipy dyads for two-photons fluorescence imaging in cells [PDF]

, 2016
Fluorescent probes are essential tools for studying biological systems. The last decade has witnessed particular interest in the development of two-photon excitable probes, due to their advantageous features in tissue imaging compared to the ...
Collado, Daniel
core  

On the Theory of Interband Two-Photon Absorption of Light in Semiconductors. Accounting Admixtures to the States of the Conduction Band and Valence States, the Rabi Effect

East European Journal of Physics
We present a theoretical study of interband two‐photon (two‐quantum) absorption of polarized light in semiconductors of cubic and tetrahedral symmetry.
Rustam Y. Rasulov, Vokhob Rasulov, Forrukh U. Kasimov, Mardonbek Kh. Nasirov, Islam E. Farmanov   +4 more
doaj   +1 more source

Linear and nonlinear luminescence properties of thiophene based materials [PDF]

Journal of the Serbian Chemical Society, 2005
Three new thiophene based organic luminescence compounds, i.e., 2,5-bis(4’-N,N-dimethylaminostyryl) thiophene (BMST), 2,5-bis(4’-N,N-diethylaminostyryl)thiophene (BEST) and 2,5-bis(4’-N-cyclobutylaminostyryl)thiophene (BBST), were synthesized.
PING LU, GUANG MING XIA
doaj  

Colors of entangled two-photon absorption. [PDF]

Proc Natl Acad Sci U S A, 2023
Varnavski O, Giri SK, Chiang TM, Zeman CJ, Schatz GC, Goodson T.   +5 more
europepmc   +1 more source