Results 51 to 60 of about 190,833 (286)

Nonlinear optical properties of photoresists for projection lithography [PDF]

, 1996
Optical beams are self-focused and self-trapped upon initiating crosslinking in photoresists. This nonlinear optical phenomenon is apparent only for low average optical intensities and produces index of refraction changes as large as 0.04.
Kewitsch, Anthony S., Yariv, Amnon
core   +1 more source

Nanoscale Optical Trapping by Means of Dielectric Bowtie

Photonics, 2022
Plasmonic and dielectric tweezers represent a common paradigm for an innovative and efficient optical trapping at the micro/nanoscale. Plasmonic configurations provide subwavelength mode confinement, resulting in very high optical forces, at the expense ...
Giuseppe Brunetti, Nicola Sasanelli, Mario Nicola Armenise, Caterina Ciminelli   +3 more
doaj   +1 more source

Optical Trapping of an Ion

, 2010
For several decades, ions have been trapped by radio frequency (RF) and neutral particles by optical fields. We implement the experimental proof-of-principle for trapping an ion in an optical dipole trap. While loading, initialization and final detection
A Drakoudis, A Friedenauer, A Friedenauer, A Micheli, AT Grier, C Kollath, C Tuchendler, C Zipkes, Ch. Schneider, D Leibfried, D Porras, DJ Wineland, DR Leibrandt, I Buluta, J Weiner, J Ye, JI Cirac, JP Gordon, K-K Ni, M. Enderlein, ME Gehm, R Grimm, R Schmied, R Schmied, T Rosenband, T Schaetz, T Volz, T. Huber, T. Schaetz, W Paul, WD Phillips, Y Feng   +31 more
core   +1 more source

Plasmon-assisted optical trapping and anti-trapping

Light: Science & Applications, 2016
The ability to manipulate small objects with focused laser beams has opened a venue for investigating dynamical phenomena relevant to both fundamental and applied science. Nanophotonic and plasmonic structures enable superior performance in optical trapping via highly confined near-fields.
Ivinskaya, Aliaksandra, Petrov, Mihail I, Bogdanov, Andrey A, Shishkin, Ivan, Ginzburg, Pavel, Shalin, Alexander S   +5 more
openaire   +2 more sources

Deciphering single- and multi-particle trapping dynamics under femtosecond pulsed excitation with simultaneous spatial and temporal resolution

Scientific Reports, 2022
Recent theoretical and experimental studies have shed light on how laser trapping dynamics under femtosecond pulsed excitation are fine-tuned by optical and thermal nonlinearities.
Anita Devi, Sumit Yadav, Arijit K. De
doaj   +1 more source

Calculation and optical measurement of laser trapping forces on non-spherical particles [PDF]

, 2001
Optical trapping, where microscopic particles are trapped and manipulated by light is a powerful and widespread technique, with the single-beam gradient trap (also known as optical tweezers) in use for a large number of biological and other applications.
Ashkin, Bancroft, Barton, Doicu, Draine, Draine, Farsund, Friese, Friese, Friese, Ghislain, Gouesbet, Grier, H. Rubinsztein-Dunlop, Hafner, He, Heckenberg, Hoekstra, Jackson, Luo, Mishchenko, Mishchenko, N.R. Heckenberg, Neto, Peterson, Pralle, Ren, Svoboda, T.A. Nieminen, Taflove, Tsang, Volakis, White, Wohland, Wriedt   +34 more
core   +2 more sources

Sequence determinants of RNA G‐quadruplex unfolding by Arg‐rich regions

FEBS Letters, EarlyView.
We show that Arg‐rich peptides selectively unfold RNA G‐quadruplexes, but not RNA stem‐loops or DNA/RNA duplexes. This length‐dependent activity is inhibited by acidic residues and is conserved among SR and SR‐related proteins (SRSF1, SRSF3, SRSF9, U1‐70K, and U2AF1).
Naiduwadura Ivon Upekala De Silva, Puspa Kunwar, Md Ibnul Rifat Rahman, Joanna Koryo Kwao, Nathan Lehman, Zihan Zhang, Trenton Paul, Claire Cheng, Nicholas Truex, Hui‐Ting Lee, Jun Zhang   +10 more
wiley   +1 more source

PARP inhibitors induce a senescence phenotype in non‐small cell lung carcinoma cell lines

FEBS Open Bio, EarlyView.
Talazoparib is the most potent inducer of senescence among different PARP1 inhibitors in human NSCLC cells. In the absence of PARP, no senescence phenotype was observed, demonstrating that PARP1 is necessary for the induction of senescence by this inhibitor.
Camille Huart, Manon Van den Abbeel, Christoph Schifflers, Karim Bouhjar, Andrea Scarmelotto, Alexis Khelfi, Anne‐Catherine Wera, Carine Michiels   +7 more
wiley   +1 more source

Orientation- and wavelength-dependent sperm motility in optical trapping

Journal of Innovative Optical Health Sciences
Optical tweezers technology has the characteristics of noncontact manipulation in three dimensions and steerable separation in solutions, and could be applied to obtain a separated sperm with high quality for intracytoplasmic sperm injection (ICSI ...
Juan Wang, Jifu Lyu, Haoyu Pan, Xinyu Fan, Xiang Jiang, Xuhui Bao, Yi Wang, Fengya Lu, Zhiguo Zhang, Zhensheng Zhong, Jinhua Zhou   +10 more
doaj   +1 more source

Single‐molecule DNA flow‐stretch assays for high‐throughput DNA–protein interaction studies

FEBS Open Bio, EarlyView.
We describe an optimised single‐molecule DNA flow‐stretch assay that visualises DNA–protein interactions in real time. Linear DNA fragments are tethered to a surface and stretched by buffer flow for fluorescence imaging. Using λ and φX174 DNA, this protocol enhances reproducibility and accessibility, providing a versatile approach for studying diverse ...
Ayush Kumar Ganguli, Mohammad Nour Alsamsam, Ugnė Bagdonaitė, Van Truc Vu, Chun‐Jen Huang, Polina Kuzhir, Mindaugas Zaremba, Aurimas Kopūstas, Marijonas Tutkus   +8 more
wiley   +1 more source