Results 81 to 90 of about 103,028 (311)

Stimulated emission from hexagonal silicon-germanium nanowires

Communications Physics
Hexagonal crystal phase silicon-germanium (hex-SiGe) features efficient direct bandgap emission between 1.5 and 3.4 µm. For expanding its application potential, the key challenge is to demonstrate material gain for enabling a hex-SiGe semiconductor laser.
Marvin A. J. van Tilburg, Riccardo Farina, Victor T. van Lange, Wouter H. J. Peeters, Steffen Meder, Marvin M. Jansen, Marcel A. Verheijen, M. Vettori, Jonathan J. Finley, Erik. P. A. M. Bakkers, Jos. E. M. Haverkort   +10 more
doaj   +1 more source

Metasurfaces with Multipolar Resonances and Enhanced Light–Matter Interaction

Nanomaterials
Metasurfaces, composed of engineered nanoantennas, enable unprecedented control over electromagnetic waves by leveraging multipolar resonances to tailor light–matter interactions.
Evan Modak Arup, Li Liu, Haben Mekonnen, Dominic Bosomtwi, Viktoriia E. Babicheva   +4 more
doaj   +1 more source

Entanglement of an Atom and Its Spontaneous Emission Fields via Spontaneously Generated Coherence [PDF]

Journal of Sciences, Islamic Republic of Iran, 2011
The entanglement between a ?-type three-level atom and its spontaneous emission fields is investigated. The effect of spontaneously generated coherence (SGC) on entanglement between the atom and its spontaneous emission fields is then discussed.
M. Sahrai
doaj  

ON THE RATE-EQUATIONS OF SEMICONDUCTOR-LASERS FOR MEASURING SPONTANEOUS EMISSION FACTOR

, 1995
The rate equations used for measuring spontaneous emission factor beta is examined through the comparison of numerical results, The results show that beta obtained by using total spontaneous emission rate R(sp) = N/tau sp is about double of that using R ...
HUANG YZ CHINESE ACAD SCIINST SEMICONDNATL INTEGRATED OPTOELECTR LABPOB 912BEIJING 100083PEOPLES R CHINA., HUANG YZ   +1 more
core  

Janus Photonic Graphics by Stratified Assembly of Two Distinct Colloids

Advanced Functional Materials, EarlyView.
Double‐sided Janus photonic micropatterns with vivid structural colors are fabricated through a single‐step bottom‐up strategy. Density‐driven stratification and depletion‐mediated crystallization of PMMA and PS binary colloids lead to exclusive lattices on opposite surfaces under centrifugal force.
Young Geon Kim, Yongseok Jung, Sehee Yang, Jiwoo Lee, Shin‐Hyun Kim   +4 more
wiley   +1 more source

Spontaneous emission lifetime distribution of infinite line antennas in two-dimensional photonic crystals with finite size

, 2007
The authors calculate the lifetime distribution functions of spontaneous emission from infinite line antennas embedded in two-dimensional disordered photonic crystals with finite size.
Wang YQ (Wang Yiquan), Xu XS (Xu Xingsheng), Xu, XS, Chinese Acad Sci, Inst Semicond, State Key Lab Integrated Optoelect, Beijing 100083, Peoples R China. 电子邮箱地址: xsxu@red.semi.ac.cn   +2 more
core  

Ultrafast spontaneous emission source using plasmonic nanoantennas

, 2015
Typical emitters such as molecules, quantum dots and semiconductor quantum wells have slow spontaneous emission with lifetimes of 1-10ns, creating a mismatch with high-speed nanoscale optoelectronic devices such as light-emitting diodes, single-photon ...
Mikkelsen, Maiken H., Akselrod, Gleb M., Argyropoulos, Christos, Hoang, Thang B., Smith, David R., Huang, Jiani   +5 more
core   +1 more source

Controlled Engineering of 2D Alkali‐Iron‐Chloride Compounds and Lateral Quantum Heterostructures Within Confined Graphene Nanoreactors

Advanced Functional Materials, EarlyView.
This work presents a programmable atomic engineering strategy for 2D materials using Å‐scale nanoreactors formed by bilayer graphene (BLG) intercalation. A new class of alkali‐iron‐chloride compounds, along with lateral heterostructures composed of monolayer alkali halides and iron chlorides, is revealed.
Haiming Sun, Qiunan Liu, Yung‐Chang Lin, Mahdi Ghorbani‐Asl, Hiroki Ago, Arkady V. Krasheninnikov, Kazu Suenaga   +6 more
wiley   +1 more source

Analysis of modified bowtie nanoantennas in the excitation and emission regimes

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
In this work, we analyze modified bowtie nanoantennas with polynomial sides in the excitation and emission regimes. In the excitation regime, the antennas are illuminated by an incident plane wave, and in the emission regime, the excitation is fulfilled ...
Karlo Q. da Costa, Victor A. Dmitriev
doaj   +1 more source

Enhancement of spontaneous emission in Tamm plasmon structures

Scientific Reports, 2017
It was theoretically and experimentally demonstrated that in metal/semiconductor Tamm plasmon structures the probability of spontaneous emission can be increased despite losses in metal, and theoretical analysis of experimental results suggested that the
A. R. Gubaydullin, C. Symonds, J. Bellessa, K. A. Ivanov, E. D. Kolykhalova, M. E. Sasin, A. Lemaitre, P. Senellart, G. Pozina, M. A. Kaliteevski   +9 more
doaj   +1 more source