Results 161 to 170 of about 41,481 (313)

High efficiency grating couplers for strain tunable GaAs quantum dot based entangled photon sources

AIP Advances
The on-chip integration of single photon and entangled photon emitters such as epitaxially grown semiconductor quantum dots into photonic frameworks is a rapidly evolving research field.
Constantin Schmidt, Chenxi Ma, Frederik Benthin, Jingzhong Yang, Eddy P. Rugeramigabo, Michael Zopf, Fei Ding   +6 more
doaj   +1 more source

Coupling of Er3+ ions and Plasmonic Modes in Vertical Nanocavities for Spectral Broadening in Telecom Bands

Advanced Materials Technologies, EarlyView.
Left: Illustration of the glass & nanostructures system and the NIR emission at 1.5 µm, where the colored spheres represent the Er3+ ions within the doped glass. Right: Representation of the Stark splitting of the 4I13/2 and 4I15/2 manifolds of the Er3+, illustrating how the plasmonic modes facilitate the emission from the broader Stark manifold ...
Gaston Lozano Calderón, Víctor Anthony García Rivera, Stéphan Cagnon, Souleymane Toubou Bah, Younès Messaddeq, Euclydes Marega Junior   +5 more
wiley   +1 more source

Unveiling the morphology of buried In(Ga)As nanostructures by selective wet chemical etching: From quantum dots to quantum rings

, 2007
The three-dimensional morphology of In(Ga)As nanostructures embedded in a GaAs matrix is investigated by combining atomic force microscopy and removal of the GaAs cap layer by selective wet etching.
Kiravittaya, S (Kiravittaya, Suwit), Schmidt, OG (Schmidt, Oliver G.), Wang, LJ (Wang, Lijuan), Ding, F, Max Planck Inst Festkorperforsch, Heisenbergerstr 1, D-70569 Stuttgart, Germany. 电子邮箱地址: f.ding@fkf.mpg.de, Ding, F (Ding, Fei), Muller, E (Mueller, Elisabeth), Rastelli, A (Rastelli, Armando)   +6 more
core  

Enhancing Small Molecule Sensing With Aptameric Functionalized Nano Devices

Advanced Materials Technologies, EarlyView.
Unveiling an ultra‐sensitive, non‐invasive neurotransmitter sensor. For the first time, a nanoscale sensor for detecting an important neurotransmitter was demonstrated using micro‐electromechanical systems (MEMS) technology. Our approach utilized field‐effect transistor (FET)‐based readout to enable pico‐molar detection of biomarkers in sweat.
Thi Thanh Ha Nguyen, Cong Minh Nguyen, Quang Thang Trinh, Minh Anh Huynh, Khanh Vinh Ho, Dang Co Pham, Dzung Dao, Sven Ingebrandt, Sina Jamali, Xuan Thang Vu, Nam‐Trung Nguyen, Tuan‐Khoa Nguyen   +11 more
wiley   +1 more source

Photolithographic Patterning of Colloidal Quantum Dots Enabled by Plasma‐Induced Ligand Polymerization

Advanced Materials Technologies, EarlyView.
Plasma‐induced ligand polymerization on colloidal quantum dots (QDs) renders them resistant to organic solvents, enabling conventional photoresist‐based photolithography. This approach achieves microscale patterning with feature sizes down to 3 µm, preserving the optical properties of the QDs and offering a simple and scalable route for QD‐based ...
Boram Kim, Jaehyeon Kim, Heeyeop Chae
wiley   +1 more source

Direct composition proriling in III-V nanostructures by cross-sectional STM [PDF]

, 2002
Using cross-sectional STM we have studied the local compo-sition in III–V nanostructures such as GaAs/InGaAs quantum wells, InGaNAs/InP quantum wells and quantum dots, and InAs/GaAs self-assembled quantum dots.
Skolnick, M, Koenraad, PM, Devreese, J.T., Long, Fei, Devreese, JT, Gill, S.P.A., Hopkinson, M., Gill, SPA, Bruls, DM, Skolnick, M.S., Wolter, J.H., Long, F, Koenraad, P.M., Wolter, JH, Davies, JH, Davies, J.H., Hopkinson, M, Bruls, D.M.   +17 more
core  

Coaxial Melt Electrowriting

Advanced Materials Technologies, EarlyView.
Coaxial melt electrowriting is established to produce dual‐property microfibers with diameters spanning 1.6–29.2 µm. Stable coaxial laminar flow is preserved under electrohydrodynamic thinning, enabling controlled binary and gradient material switching within individual continuous fibers.
Patrick C. Hall, D. Iman von Briesen, Maya Kasteleiner, Gabriela M. Bailey, Diana Ostojich, Harrison W. Reid, Andre Olarra, Benjamín J. Alemán, Simon Luposchainsky, Biranche Tandon, Ramesh Jasti, Paul D. Dalton   +11 more
wiley   +1 more source

Transport in quantum nanostructures

, 2014
This thesis discusses electronic transport in uni-dimensional quantum systems whose properties are studied with an extensive use of the finite-frequency non symmetrised excess noise. The first part focuses on transport through an impurity embedded in a Luttinger liquid coupled to an arbitrary electromagnetic environment.
openaire   +1 more source

Turning Water Into a Tool: From Degradation Pathways to Functional Engineering in Halide Perovskites

Advanced Materials Technologies, EarlyView.
Water exhibits a threshold‐dependent dual role in lead halide perovskites, acting either as a degradation trigger or as a powerful tool for defect passivation, recrystallization, and structural engineering. This review discusses how controlled water‐mediated interactions govern stability, dimensionality, and optoelectronic performance, providing ...
Raphaella T. S. Gonçalves, Gabriela O. Gera, Aryane Tofanello, Jose A. Souza, Andre L. M. Freitas   +4 more
wiley   +1 more source

Exciton Radiative Lifetimes in Hexagonal Diamond Ge and SixGe1–x Alloys

Advanced Optical Materials, EarlyView.
Strong room‐temperature photoluminescence reported in hexagonal Ge conflicts with theory predicting a nearly dark band edge. First‐principles calculations of excitonic radiative lifetimes fill a key gap in this debate, showing that pristine hexagonal Ge remains intrinsically weakly emissive, while Si alloying only modestly shortens the lifetime and ...
Michele Re Fiorentin, Michele Amato, Maurizia Palummo   +2 more
wiley   +1 more source