Results 221 to 230 of about 6,540,164 (372)

Design Rules for Perovskite Nanocrystals: Volume‐Governed Absorption Versus Shape‐Controlled Auger Recombination

open access: yesAdvanced Optical Materials, EarlyView.
Femtosecond TAS measurements on perovskite nanocrystals reveal how the one‐photon absorption cross‐section scales linearly with nanocrystal volume, independent of shape. In contrast, biexciton Auger lifetimes vary strongly with shape and remain constant in the weak confinement regime for nanocrystals larger than the exciton Bohr radius, offering new ...
Andreas Singldinger   +8 more
wiley   +1 more source

940 nm Micro‐Light‐Emitting Diode Fabricated on Industry‐Compatible 300 mm Si (100) Substrate by Metal–Organic Chemical Vapor Deposition

open access: yesAdvanced Photonics Research, EarlyView.
The fabrication of 940 micro‐light‐emitting diodes on both 300 mm Si and Ge/Si wafers has been demonstrated using direct metal–organic chemical vapor deposition epitaxy. These promising results show the potential for monolithic integration of III‐As onto complementary metal‐oxide‐semiconductor (CMOS)‐compatible silicon platforms. This achievement opens
Hadi Hijazi   +12 more
wiley   +1 more source

Ultrabright Fiber‐Coupled Polarization‐Entangled Photon Source with Spectral Brightness Surpassing 2.0 MHz mW−1 nm−1

open access: yesAdvanced Photonics Research, EarlyView.
In this study, it implements a high‐efficiency polarization‐entangled photon source based on single‐mode fiber coupling with a spectral brightness exceeding 2.0 MHz mW−1 nm−1, utilizing a spatial mode‐matching technique. The results of this study provide a more intuitive and practical guide for implementing high‐efficiency quantum light sources ...
Kyungdeuk Park   +4 more
wiley   +1 more source

Clinical Challenges in Soft Robotics

open access: yesAdvanced Robotics Research, EarlyView.
This review explores the exciting field of soft robots for medical applications. It delves into the critical challenges facing their development, including material selection, cytotoxicity, and locomotion limitations. The review then examines promising avenues for overcoming these hurdles and achieving clinical translation.
Kailas Mahipal Malappuram   +3 more
wiley   +1 more source

Bias reduction for low-statistics PET: maximum likelihood reconstruction with a modified Poisson distribution. [PDF]

open access: yesIEEE Trans Med Imaging, 2015
Van Slambrouck K   +6 more
europepmc   +1 more source

Inflatable Kirigami Crawlers

open access: yesAdvanced Robotics Research, EarlyView.
Inflatable kirigami crawlers are fabricated from heat‐sealable textiles and achieve motion through cyclic pneumatic actuation. Strategically placed kirigami cuts guide asymmetric deformation, doubling contraction compared to traditional pouches and forming scale‐like surfaces.
Burcu Seyidoğlu   +3 more
wiley   +1 more source

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