Results 241 to 250 of about 610,284 (295)

Smart Face Masks as Wearable Respiratory Sensors: A Review of Sensor Technologies, Materials, and Future Directions

Advanced Healthcare Materials, EarlyView.
This review highlights recent advances in smart face masks that actively monitor breathing. By integrating humidity, gas, temperature, pressure, strain, and triboelectric sensors, these masks track key respiratory parameters in real time. The article summarizes sensor mechanisms, compares performance across studies, and discusses challenges and future ...
Negin Faramarzi, Naseeh Backer Kannanthodi, Alice Nicole Casling, Babar Ali, Samira Lakouraj Mansouri, Alessandro Giuseppe D'aloia, Hossein Cheraghi Bidsorkhi, Maria Sabrina Sarto   +7 more
wiley   +1 more source

Nanobody‐Conjugated Theranostic Prodrug Targeting αvβ3 Integrin Enables Precision Cancer Therapy With Real‐Time Imaging

Advanced Healthcare Materials, EarlyView.
The image shows a schematic form a nanobody‐conjugated theranostic prodrug (NBD) platform targeting tumor‐associated αvβ3 integrin. The NBD system integrates selective nanobody‐mediated tumor recognition, glutathione‐responsive disulfide cleavage for doxorubicin release, and aza‐BODIPY‐based near‐infrared fluorescence for real‐time imaging.
Sanu Karan, Hyunseung Lee, Rema Naskar, Mi Young Cho, Hye Sun Park, Eun Hee Han, Soumyadip Hore, Sun Hee Cho, Truc Ngoc Kim Lam, Taewoong Son, Tae Jung Park, Inkyu Hwang, Jonathan L. Sessler, Kwan Soo Hong   +13 more
wiley   +1 more source

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Polarization-independent nonlocal metasurfaces

Optica Imaging Congress (3D, COSI, DH, FLatOptics, IS, pcAOP), 2023
We design a polarization-independent metasurface using guided resonances with degenerate band curvatures in a photonic crystal slab. Our device can perform both free-space compression and spatial differentiation when operated at different frequencies at normal incidence.
Olivia Y. Long, Cheng Guo, Weiliang Jin, Shanhui Fan   +3 more
openaire   +1 more source

Polarization-independent Talbot effect

Optics Letters, 2015
We report the first observation of polarization-independent Talbot effect with a high-density grating for TE and TM polarizations, which is attributed to the identical phases and diffraction efficiencies of the diffraction orders for both polarizations.
Shubin, Li, Changhe, Zhou, George, Barbastathis   +2 more
openaire   +2 more sources

Polarization-Independent Electrooptic Depolarizer

Integrated Photonics Research, 1995
Optical depolarizers are frequently used in optical measurement equipment as well as in fiberoptic sensors to remove undesired polarization sensitivity [1]. Recently, depolarizers have also been employed in long-haul all-optical communication systems to avoid polarization hole burning (anisotropic gain saturation) in the erbium-doped fiber amplifiers ...
F, Heismann, K L, Tokuda
openaire   +2 more sources

Compact polarization-independent optical circulator

Applied Optics, 1981
This paper introduces a compact polarization-independent optical circulator for communications using multimode optical fibers. This circulator consists of two pairs of rutile prisms used as polarization separators, a YIG Faraday rotator, a ring-shaped magnet, and a quartz halfwave plate.
M, Shirasaki, H, Kuwahara, T, Obokata
openaire   +2 more sources

Polarization-independent tunable reflector

2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM), 2014
In this paper, a novel tunable reflector with gain medium was designed, fabricated and measured. By incorporating active elements into two magnetic metamaterial SRRs, gain medium with positive loss, perfect losslessness and even negative loss can be tuned to switch the function of the active reflector among a perfect absorber, a perfect reflector and a
Tianwei Deng, Peng Khiang Tan, Ruifeng Huang   +2 more
openaire   +1 more source

Polarization independent isolator using spatial walkoff polarizers

IEEE Photonics Technology Letters, 1989
A novel type of polarization-independent optical isolator is described which utilizes the polarization walkoff provided by birefringent crystals. Isolation of 44 dB is measured at a wavelength of 1.3 mu m with single-mode fiber insertion loss of 1.5 dB.
K.W. Chang, W.W. Sorin
openaire   +1 more source

Polarization-independent tunable optical filters using bilayer polarization gratings

Applied Optics, 2010
We demonstrate a polarization-independent tunable optical filter based on switchable polarization gratings (PGs) formed using reactive and nonreactive liquid crystals (LCs). PGs are anisotropic diffraction gratings that exhibit unique properties, including a zero-order transmittance that is independent of incident polarization and that can vary from ...
Elena, Nicolescu, Michael J, Escuti
openaire   +2 more sources

Highly compact polarization-independent grating coupler

Optics Letters, 2010
We propose a compact polarization-independent output grating coupler, which consists of T-shaped grooves. For only 20 periods on a silicon-on-insulator wafer with a 260nm thick top silicon layer, the output coupling efficiencies for both the TE and the TM modes are larger than 50% in the wavelength range of 1480-1580nm and are approximately 58% around ...
Shiqian, Shao, Yi, Wang
openaire   +2 more sources