Results 101 to 110 of about 15,014 (299)

Terahertz quantum cascade laser with non-resonant extraction

AIP Advances, 2019
In order to improve the maximum operating temperature of THz quantum cascade lasers (QCLs) we propose to modify the three well resonant phonon design by increasing the energy of the separation between the bottom transition levels and the ground states ...
A. N. Baranov, H. Nguyen-Van, Z. Loghmari, M. Bahriz, R. Teissier   +4 more
doaj   +1 more source

Bandgap‐Engineered PtxTey:Ag2Te Composite Quantum Dots Enable Programmable NIR‐II Imaging and Photothermal‐Immune Synergistic Therapy

Advanced Science, EarlyView.
A bandgap‐engineered PtxTey:Ag2Te quantum dot platform enables tunable NIR‐IIb emission for deep‐tissue imaging and mild photothermal therapy. Conjugation with αPD‐L1 confers dual tumor targeting and real‐time monitoring of PD‐L1 dynamics. Mild photothermal modulation induces immune reprogramming, enhancing checkpoint blockade efficacy and achieving ...
Jing Liu, Rui Xu, Quan Wu, Tian‐Xin Xiao, Lai‐Xi Zhao, Lei Sun, Ya‐Wen Zheng, Liang Dong, Zhi‐Quan Tian, Haibo Wang   +9 more
wiley   +1 more source

Enhancing Blood Circulation With Epsilon‐Near‐Zero (ENZ) Materials via the Far‐Infrared Window of Human Skin

Advanced Science, EarlyView.
Epsilon‐near‐zero (ENZ) silicon carbide enables a selective far‐infrared emitter spectrally aligned with the human skin window around 10 µm for wavelength‐matched thermal therapy. In 25 within‐subject trials (50 hands) monitored by laser speckle contrast imaging, SiC increases blood perfusion by 30.2% versus a broadband graphite emitter while ...
Wen‐Teng Yao, Shan‐Chiao Yang, Ming‐Feng Tsai, Hsuen‐Li Chen   +3 more
wiley   +1 more source

Physics of intraband quantum dot optoelectronic devices [PDF]

, 2007
In last two decades, semiconductor nanostructures, such as quantum wells, wires and dots, have been recognised as sources and detectors of radiation in the mid- and far-infrared region of the spectrum.
Vukmirovic, Nenad
core  

A Periosteum‐Inspired Janus Piezoelectric Scaffold Using Bioenergetic‐Driven H‐Type Vascularization for Diabetic Bone Regeneration

Advanced Science, EarlyView.
A periosteum‐inspired Janus piezoelectric scaffold converts micromechanical forces into electrical signals and synergizes with controlled resveratrol release. This dual action reprograms endothelial metabolism, drives H‑type vessel formation, and restores bone–vessel coupling in diabetic bone defects.
Kai Wang, Kai Jiang
wiley   +1 more source

A mini-staged multi-stacked quantum cascade laser for improved optical and thermal performance

, 2009
In this paper, a mini-staged multi-stacked quantum cascade laser structure with a designed wavelength of 4.7 mu m is presented. By introducing five 0.5 mu m thick high thermal conductivity InP interbuffer layers, the 60-stages active region core of the ...
Liu JQ, Liu JQ Chinese Acad Sci Inst Semicond Key Lab Semicond Mat Sci POB 912 Beijing 100083 Peoples R China. E-mail Address: jqliu@semi.ac.cn, Wang LJ, Wang ZG, Li L, Liu FQ   +5 more
core  

Tunable and compact dispersion compensation of broadband THz quantum cascade laser frequency combs [PDF]

, 2019
Miniaturized frequency combs (FCs) can be self-generated at terahertz (THz) frequencies through four-wave mixing in the cavity of a quantum cascade laser (QCL).
Garrasi, Katia, Li, L, Mezzapesa, FP, Pistore, V, Li, Lianhe, Dhillon, Sukhdeep, Vitiello, MS, Linfield, Edmund,, Davies, A. Giles, Linfield, Edmund, H., Linfield, EH, Davies, AG, Vitiello, Miriam, Mezzapesa, Francesco, Garrasi, K, Dhillon, S, Pistore, Valentino   +16 more
core   +1 more source

Electromagnetic Radiation Stimulated Learning in Perovskite Nickelates

Advanced Science, EarlyView.
ABSTRACT Biological plasticity refers to the ability of synapses to strengthen or weaken over time. These adaptive properties play a fundamental role in learning and memory, spanning many orders of magnitude in timescales. Short‐term plasticity (STP) arises from rapid correlative activity, while long‐term plasticity (LTP) is governed by slower ...
Ranjan Kumar Patel, Kabir Zama, Matthew Smart, Ramya Eathirajan, Ivan Seskar, Narayan Mandayam, Guangxin Ni, Martin Mönnigmann, Shriram Ramanathan   +8 more
wiley   +1 more source

Growth of a periodic InP-based heteroepitaxial structure for a quantum cascade laser

, 2005
The route to grow InP-based heteroepitaxial structure for quantum cascade laser by molecular beam epitaxy is reported. Optimized growth conditions including substrate temperature, V/III ratio, growth rates, doping levels and interface control are ...
Wang, ZG, Li, CM, Liu, JQ, Liu, FQ, Chinese Acad Sci, Inst Semicond, Key Lab Semicond Mat Sci, POB 912, Beijing 100083, Peoples R China. 电子邮箱地址: fqliu@red.semi.ac.cn, Liu, FQ, Guo, Y   +5 more
core  

Fully phase-stabilized quantum cascade laser frequency comb

Nature Communications, 2019
Here, the authors demonstrate full stabilization and control of the two key parameters of a four-wavemixing-based quantum cascade laser comb with metrological precision.
Luigi Consolino, Malik Nafa, Francesco Cappelli, Katia Garrasi, Francesco P. Mezzapesa, Lianhe Li, A. Giles Davies, Edmund H. Linfield, Miriam S. Vitiello, Paolo De Natale, Saverio Bartalini   +10 more
doaj   +1 more source