Results 271 to 280 of about 3,110,122 (363)

Choosing a polarisation configuration for dynamic light scattering and laser speckle contrast imaging. [PDF]

Biomed Opt Express
Akther S, Mikkelsen MB, Postnov DD.
europepmc   +1 more source

Simultaneous Perfect Anomalous Reflection and Angle of Arrival Sensing in Reconfigurable Intelligent Surfaces

Advanced Optical Materials, EarlyView.
A reconfigurable intelligent surface is proposed that can simultaneously anomalously reflect the light and sense the angle of arrival. An in situ optimization of either the currents flowing on array elements or the far field in the receiver direction realizes anomalous reflection and suppresses parasitic scattering.
Mostafa Movahediqomi, Yongming Li, Grigorii Ptitcyn, Viktar Asadchy, Sergei Tretyakov   +4 more
wiley   +1 more source

Non-invasive laser speckle contrast imaging (LSCI) of extra-embryonic blood vessels in intact avian eggs at early developmental stages. [PDF]

Biomed Opt Express
Dong Z, Mahler S, Readhead C, Chen X, Dickson M, Bronner M, Yang C.   +6 more
europepmc   +1 more source

Femtosecond Direct Laser Writing of Conductive and Electrically Switchable PEDOT:PSS Optical Nanostructures

Advanced Optical Materials, EarlyView.
Commercial femtosecond direct laser writing (Nanoscribe GT) is utilized to fabricate electrically switchable PEDOT:PSS nanostructures on ITO‐coated glass substrates, as well as underneath and on top of 3D‐printed structures and demonstrates beam‐switching at 1550 nm. Abstract Microscale three‐dimensional (3D)‐printing, with its remarkable precision and
Dominik Ludescher, Pavel Ruchka, Leander Siegle, Yanzhe Huang, Philipp Flad, Monika Ubl, Sabine Ludwigs, Mario Hentschel, Harald Giessen   +8 more
wiley   +1 more source

Skin Microvascular Dysfunction in Type 2 Diabetes Mellitus Using Laser Speckle Contrast Analysis and Association with Carotid Intima-Media Thickness. [PDF]

J Clin Med
Lamprou S, Koletsos N, Zografou I, Lazaridis A, Mintziori G, Trakatelli CM, Kotsis V, Gkaliagkousi E, Doumas M, Triantafyllou A.   +9 more
europepmc   +1 more source

Large Bidirectional Refractive Index Change in Silicon‐rich Nitride via Visible Light Trimming

Advanced Optical Materials, EarlyView.
Continuous‐wave visible light trimming of PECVD silicon‐rich nitride micro‐ring resonators enables precise, large bidirectional refractive index tuning. Resonance shifts as fine as 10 pm are achieved with a cost‐effective setup, demonstrating large red shifts of 49.1 nm and blue shifts of 10.6 nm.
Dmitrii Belogolovskii, Md Masudur Rahman, Karl Johnson, Vladimir Fedorov, Andrew Grieco, Nikola Alic, Abdoulaye Ndao, Paul K. L. Yu, Yeshaiahu Fainman   +8 more
wiley   +1 more source

Wide dynamic range measurement of blood flow in vivo using laser speckle contrast imaging. [PDF]

J Biomed Opt
Liu HL, Yuan Y, Han L, Bi Y, Yu WY, Yu Y.   +5 more
europepmc   +1 more source

High Fidelity Waveguides Through Vitreous Media Recomposition for Next Generation Photonic Devices

Advanced Optical Materials, EarlyView.
A newly designed aluminosilicate glass enables the fabrication of femtosecond laser‐written optical waveguides with ultra‐low propagation losses of −0.020 dB cm−1 at 1310 nm and −0.037 dB cm−1 at 1550 nm. Raman, Brillouin, and electron microscopy analyses reveal the mechanisms behind refractive index modifications, highlighting the role of glass ...
T Toney Fernandez, Andrew Ross‐Adams, Mark Bakovic, Jens Ulrich Thomas, Oliver Hochrein, Hadi Mahmodi, Irina Kabakova, Karen Privat, Michael Withford, Simon Gross   +9 more
wiley   +1 more source

Real-time quantification of laser speckle contrast imaging during intestinal laparoscopic surgery: successful demonstration in a porcine intestinal ischemia model. [PDF]

Surg Endosc
Hoffman JT, Heuvelings DJI, van Zutphen T, Stassen LPS, Kruijff S, Boerma EC, Bouvy ND, Heeman WT, Al-Taher M.   +8 more
europepmc   +1 more source

Angle‐ and Polarization‐Tolerant Metasurface Designs Based on the Aperiodic Tiling

Advanced Optical Materials, EarlyView.
A novel aperiodic metasurface design is introduced to mitigate the inherent angle and polarization sensitivity of conventional metasurfaces. By employing a recently discovered aperiodic tiling approach, identical elliptical scatterers are arranged with systematic variations in their spacing and orientation, effectively minimizing spectral reflectance ...
Minyeul Lee, Suwan Jeon, Jonghwa Shin
wiley   +1 more source