Results 81 to 90 of about 24,147 (270)

Nd-complex-doped polymer channel waveguide laser [PDF]

, 2009
Laser operation at 1060 nm with slope efficiency of 0.95% and 440 μW output power for 2% outcoupling was demonstrated in Nd-complex-doped FDA/epoxy channel waveguides, in what to our knowledge is the first report of a rare-earth-ion-doped polymer ...
Diemeer, M.B.J., Driessen, A., Grivas, C., Pollnau, M., Yang, J.   +4 more
core   +1 more source

Exploring the Potential of Microwave Annealing for Enhancing Si‐based GeSn Lasers

Advanced Materials Technologies, EarlyView.
We explore low‐thermal‐budget microwave annealing to enhance the performance of group‐IV GeSn lasers on Si. Microwave annealing under optimal conditions can simultaneously relax unwanted compressive strain and enhance the material quality of the GeSn active layer, thereby reducing the threshold and increasing the laser operating temperature.
Yue‐Tong Jheng, Cheng‐Feng Liu, Ruei‐Jhang Wang, Yu Cheng, Lung‐Yi Hsu, Yonder Berencén, Shengqiang Zhou, Hanh Thi‐Thu Tran, Guo‐En Chang   +8 more
wiley   +1 more source

End‐to‐End Sensing Systems for Breast Cancer: From Wearables for Early Detection to Lab‐Based Diagnosis Chips

Advanced Materials Technologies, EarlyView.
This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane, Lyn I. Jones, Richard M. Martin, Helen Winter, Faezeh Arab Hassani   +4 more
wiley   +1 more source

Waveguides for neurostimulation in the cochlea

Frontiers in Audiology and Otology
IntroductionOptical stimulation has been suggested for neural stimulation to improve cochlear implants. Light allows for more spatially selective activation of neuron populations than electrical current, offering more independent frequency bands along ...
Matthew Kim, Joaquin Cury, Lexie Kessler, Michael Triplett, Sarah Sahota, Komal Kampasi, Xiaodong Tan, Razi-ul Haque, Claus-Peter Richter, Claus-Peter Richter, Claus-Peter Richter, Claus-Peter Richter   +11 more
doaj   +1 more source

Advances on Polymer Optical Fiber Gratings Using a KrF Pulsed Laser System Operating at 248 nm

Fibers, 2018
This paper presents the achievements and progress made on the polymer optical fiber (POF) gratings inscription in different types of Fiber Bragg Gratings (FBGs) and long period gratings (LPGs). Since the first demonstration of POFBGs in 1999, significant
Carlos A. F. Marques, Arnaldo G. Leal-Junior, Rui Min, Maria Domingues, Cátia Leitão, Paulo Antunes, Beatriz Ortega, Paulo André   +7 more
doaj   +1 more source

Electro-Absorption Optical Modulator Based on Graphene-Buried Polymer Waveguides

IEEE Photonics Journal, 2020
By exploiting the electro-absorption characteristic of graphene, we proposed and theoretically demonstrated an electro-absorption optical modulator (EOM) based on the graphene-buried polymer waveguides.
Tianhang Lian, Kaidi Yang, Xibin Wang, Minghui Jiang, Shijie Sun, Donghai Niu, Daming Zhang   +6 more
doaj   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

Bioabsorbable polymer optical waveguides for deep-tissue photomedicine

Nature Communications, 2016
Light-based therapies are of growing importance in medicine, though penetrating tissue and reaching the targeted area can be difficult. Here, the authors report the use of biodegradable waveguides capable of directing light where desired, and demonstrate
Sedat Nizamoglu, Malte C. Gather, Matjaž Humar, Myunghwan Choi, Seonghoon Kim, Ki Su Kim, Sei Kwang Hahn, Giuliano Scarcelli, Mark Randolph, Robert W. Redmond, Seok Hyun Yun   +10 more
doaj   +1 more source

Graphene Oxide Doped SU-8 Waveguide and Its Application as Saturable Absorber

IEEE Photonics Journal, 2017
Graphene oxide (GO)-doped SU-8 waveguides have been fabricated and characterized. The GO-doped SU-8 can be processed using standard photolithography parameters.
Khairul Zafri Mustafa, Wu Yi Chong, Mohd Haniff Ibrahim, Yuen Kiat Yap, Fauzan Ahmad, Choon Kong Lai, Nur Afiqah Mohd Ariffin, Harith Ahmad   +7 more
doaj   +1 more source

Towards Low Cost Coupling Structures for Short-Distance Optical Interconnections [PDF]

, 2007
The performance of short distance optical interconnections in general relies very strongly on coupling structures, since they will determine the overall efficiency of the system to a large extent.
Alajoki, T., Blanc, D., Destouches, N., Franc, J., Hendrickx, N., Karioja, P., Thienpont, H., Van Daele, P., Van Erps, J.   +8 more
core   +3 more sources