Results 41 to 50 of about 36,694 (225)

Photon Upconversion in Small Molecules

Molecules, 2022
Upconversion (UC) is a process that describes the emission of shorter-wavelength light compared to that of the excitation source. Thus, UC is also referred to as anti-Stokes emission because the excitation wavelength is longer than the emission wavelength. UC materials are used in many fields, from electronics to medicine.
Dorota Bartusik-Aebisher, Mateusz Mielnik, Grzegorz Cieślar, Ewa Chodurek, Aleksandra Kawczyk-Krupka, David Aebisher   +5 more
openaire   +3 more sources

Nanothermometry in Living Cells: Physical Limits, Conceptual and Material Challenges

Advanced Functional Materials, EarlyView.
Heat and temperature are fundamental to life. When nanothermometers began probing regions as small as a living cell, they triggered controversial claims of large intracellular temperature gradients. We review physical constraints energy‐conservation, entropy production, thermodynamic fluctuations, and molecular dynamics.
Taras Plakhotnik
wiley   +1 more source

Ultralow-threshold upconversion infrared vision via a microsphere-mediated directional photofield

Nature Communications
Constructing micro-/nanostructure-modulated photofields in upconversion devices to absorb low-energy photons and emit high-energy light is revolutionary for bioimaging, lasers, and photovoltaics, with proven capability to boost upconversion luminescence (
Dong Wang, Qikuan Cheng, Weibang Xia, Yongyao Tan, Kexuan Yu, Lu Zhang, Guigang Li, Rong Liu, Wei Wang, Linjuan Xu, Suli Wu, Yang Liu, Yunming Wang, Huamin Zhou   +13 more
doaj   +1 more source

DNA-mediated excitonic upconversion FRET switching

New Journal of Physics, 2015
Excitonics is a rapidly expanding field of nanophotonics in which the harvesting of photons, ensuing creation and transport of excitons via Förster resonant energy transfer (FRET), and subsequent charge separation or photon emission has led to the ...
Donald L Kellis, Sarah M Rehn, Brittany L Cannon, Paul H Davis, Elton Graugnard, Jeunghoon Lee, Bernard Yurke, William B Knowlton   +7 more
doaj   +1 more source

Quantum Transduction of Telecommunications-band Single Photons from a Quantum Dot by Frequency Upconversion

, 2011
The ability to transduce non-classical states of light from one wavelength to another is a requirement for integrating disparate quantum systems that take advantage of telecommunications-band photons for optical fiber transmission of quantum information ...
A Stintz, A Vandevender, AD Boozer, AJ Shields, BD Gerardot, C Langrock, C Santori, C Simon, C Zinoni, C Zinoni, E Knill, G Krauss, G Ribordy, GD Boyd, H Xu, I Marcikic, J Shah, JC Knight, JM Huang, K Srinivasan, Kartik Srinivasan, L Chanvillard, L Duan, L Ma, L Ma, Lijun Ma, M Albota, M Davanço, M Pelton, M Varnava, M Wallquist, Matthew T. Rakher, MD Eisaman, MM Fejer, O Kuzucu, Oliver Slattery, P Kok, P Michler, Q Zhang, RH Hadfield, RT Thew, S Olmschenk, S Strauf, S Tanzilli, T Chanelìere, Xiao Tang, Y-H Kim   +46 more
core   +1 more source

Triplet‐Triplet Annihilation Enhances Photochemical Curing Contrast for Vat‐Based 3D Printing

Advanced Functional Materials, EarlyView.
Triplet–triplet annihilation photopolymerization (TTAP) resins enhance curing contrast for digital light processing (DLP) 3D printing compared to conventional Type I and II photopolymerizations at matched optical densities. By exploiting a superlinear initiation response, TTAP preserves fine details, allowing reliable fabrication of complex structures ...
Connor J. O'Dea, Evan P. Scruggs, Zachariah A. Page   +2 more
wiley   +1 more source

Upconversion Luminescence Transients [PDF]

, 2006
Inhomogeneous active-ion distributions in laser materials lead to strong deviations of upconversion versus direct luminescence transients from the quadratic law of energy-transfer upconversion.
Pollnau, M.
core   +1 more source

Self‐Hybridized Exciton‐Polariton Photodetectors From Layered Metal‐Organic Chalcogenolates

Advanced Functional Materials, EarlyView.
Self‐hybridized exciton‐polariton photodetectors are demonstrated using high refractive index mithrene, eliminating the need for top mirrors. This simplified architecture enables tunable sub‐bandgap photodetection via lower exciton‐polariton states and enhanced carrier transport through ultrafast polariton group velocities.
Bongjun Choi, Adam D. Alfieri, Wangleong Chen, Deep Jariwala   +3 more
wiley   +1 more source

Efficient light upconversion via resonant exciton-exciton annihilation of dark excitons in few-layer transition metal dichalcogenides

Nature Communications
Materials capable of light upconversion—transforming low-energy photons into higher-energy ones—are pivotal in advancing optoelectronics, energy solutions, and photocatalysis. However, the discovery in various materials pays little attention on few-layer
Yi-Hsun Chen, Ping-Yuan Lo, Kyle W. Boschen, Chih-En Hsu, Yung-Ning Hsu, Luke N. Holtzman, Guan-Hao Peng, Chun-Jui Huang, Madisen Holbrook, Wei-Hua Wang, Katayun Barmak, James Hone, Pawel Hawrylak, Hung-Chung Hsueh, Jeffrey A. Davis, Shun-Jen Cheng, Michael S. Fuhrer, Shao-Yu Chen   +17 more
doaj   +1 more source

Upconversion Nanomaterials: Synthesis, Mechanism, and Applications in Sensing

Sensors, 2012
Upconversion is an optical process that involves the conversion of lower-energy photons into higher-energy photons. It has been extensively studied since mid-1960s and widely applied in optical devices. Over the past decade, high-quality rare earth-doped
Julia Xiaojun Zhao, Jiao Chen
doaj   +1 more source