Results 71 to 80 of about 38,935 (209)

On the quantum and classical scattering times due to charged dislocations in an impure electron gas

, 2002
We derive the ratio of transport and single particle relaxation times in three and two - dimensional electron gases due to scattering from charged dislocations in semiconductors. The results are compared to the respective relaxation times due to randomly
A. Gold, A. Saxler, A.F. Brana, B. Pödör, D. Jena, D. Jena, D.C. Look, Debdeep Jena, E. Frayssinet, J.P. Ibbetson, L. Hsu, O. Ambacher, S. Das Sarma, S. Elhamri, S. Elhamri, Umesh K. Mishra, Z.W. Zheng   +16 more
core   +1 more source

Trust Norms, Distrust, and Worst‐Case Defiance in the COVID‐19 Pandemic

Regulation &Governance, EarlyView.
ABSTRACT When pandemics threaten, governments are expected to protect citizens. Trustworthiness and trust are central to meeting public expectations. Motivational posturing theory differentiates resistant and dismissive defiance during the COVID‐19 pandemic.
Valerie Braithwaite
wiley   +1 more source

Impact of Polarization Charges on Threshold Voltage and Band Offset in AlGaN/GaN Heterostructures

physica status solidi (a), Volume 223, Issue 7, 7 April 2026.
The threshold voltage for the two‐dimensional electron gas of GaN‐based heterostructures is analyzed by considering the thickness of the polarization charge region at a semiconductor surface and interface. The proposed model gives the threshold voltage agreed with experimental results.
Tetsuya Suemitsu, Hiroki Imabayashi, Kenji Shiojima   +2 more
wiley   +1 more source

Role of Strain-Induced Microscale Compositional Pulling on Optical Properties of High Al Content AlGaN Quantum Wells for Deep-Ultraviolet LED

Nanoscale Research Letters, 2022
A systematic study was carried out for strain-induced microscale compositional pulling effect on the structural and optical properties of high Al content AlGaN multiple quantum wells (MQWs). Investigations reveal that a large tensile strain is introduced
Shiqiang Lu, Zongyan Luo, Jinchai Li, Wei Lin, Hangyang Chen, Dayi Liu, Duanjun Cai, Kai Huang, Na Gao, Yinghui Zhou, Shuping Li, Junyong Kang   +11 more
doaj   +1 more source

AlGaN MSM photodetectors with recess-etched LT-AlGaN cap layers

IET Optoelectronics, 2007
AlGaN metal-semiconductor-metal photodetectors with recess-etched low temperature (LT)-AlGaN cap layers were fabricated. It was found that photocurrent can be enhanced and a sharp cut-off can be achieved by etching away the LT-AlGaN cap layer in the light absorption region while keeping the LT-AIGaN cap layer under the contact electrodes.
H. Hung, S.J. Chang, Y.C. Lin, H. Kuan, R.M. Lin   +4 more
openaire   +1 more source

Self-heating and polarization effects in AlGaN/AlN/GaN/AlGaN based devices [PDF]

2017 12th European Microwave Integrated Circuits Conference (EuMIC), 2017
The interplay of self-heating and polarization affecting the current is studied in Al0.32Ga0.68N/AlN/GaN/Al0.1Ga0.9N Transmission Line Model (TLM) heterostructures with a scaled source-drain distance. The study is based on meticulously calibrated TCAD simulations against I-V experimental characteristics using an electro-thermal model.
Ahmeda, K, Ubochi, B, Kalna, K, Benbakhti, B, Duffy, SJ, Zhang, WD, Soltani, A   +6 more
openaire   +1 more source

A Review of Recent Research Advances on AlGaN-Based Deep Ultraviolet Light-Emitting Diodes

IEEE Access
Due to environmental friendliness, small size, long lifetime, and adjustable light-emitting wavelength, AlGaN-based deep ultraviolet light-emitting diodes (DUV-LEDs) have great development potential in the fields of biochemical detection, sterilization ...
Yong Huang, Yu Li, Dan Xiang
doaj   +1 more source

Propagating Polaritons in III-Nitride Slab Waveguides

, 2016
We report on III-nitride waveguides with c-plane GaN/AlGaN quantum wells in the strong light-matter coupling regime supporting propagating polaritons. They feature a normal mode splitting as large as 60 meV at low temperatures thanks to the large overlap
Butté, Raphaël, Carlin, Jean-François, Ciers, Joachim, Grandjean, Nicolas, Jacopin, Gwénolé, Roch, Jonas G.   +5 more
core   +1 more source

Dunedin Voters in the 2020s: Fickle, Cueless and Cynical or Interested, Informed and Discerning?

Kōtuitui: New Zealand Journal of Social Sciences Online, Volume 21, Issue 1, March 2026.
Overseas research indicates a weakening of the bonds between voters and political parties. Fewer voters are joining parties, fewer feel strongly attached to a party, and more voters are casting their vote for a different party across elections. A pessimistic interpretation of this ‘dealignment’ characterises contemporary voters as fickle, cueless ...
Janine Hayward, Chris Rudd, Chiara Venanzetti   +2 more
wiley   +1 more source

Deep‐UV Photonic Crystal Surface‐Emitting Lasers

Laser &Photonics Reviews, Volume 20, Issue 6, 18 March 2026.
The first deep‐UV photonic crystal surface‐emitting lasers (PCSELs) at 279 nm are demonstrated under pulsed optical pumping. The PCSELs have single‐mode emission with a 17‐pm linewidth and a divergence angle of less than 1∘$^{\circ }$. Experimental results highlight the impact of the filling factor choice on the lasing mode and the far‐field emission ...
Doğukan Apaydın, Hjalmar Andersson, Lukas Uhlig, Sarina Graupeter, Joachim Ciers, Giulia Cardinali, Erik Strandberg, Tim Wernicke, Michael Kneissl, Ulrich Theodor Schwarz, Philippe Tassin, Åsa Haglund   +11 more
wiley   +1 more source