Results 61 to 70 of about 2,122 (182)

Finite Temperature Resonant Magnetotunneling in AlGaAs-GaAs-AlGaAs Heterostructures

, 1995
We have analyzed the effect of electron-LO phonon interaction in a double-barrier resonant tunneling structure under a magnetic field {\bf B} applied parallel to the tunneling current. While the low temperature anti-crossing phenomenon has already been investigated, here we study the phonon absorption resonant magnetotunneling at finite temperatures ...
Boe, Oe. Lund, Galperin, Yu., Chao, K. A.   +2 more
openaire   +2 more sources

Quasi‐BIC and Reflective Mode Coupling Drives SHG Beyond the Q Factor Limit

Small, Volume 22, Issue 32, 8 June 2026.
An analytical expression is developed to relate second‐harmonic generation to both the resonance Q factor and absorptance. Simulations and experiments on a dual‐resonance 3R‐MoS2 metasurface validate the formula, showing that absorptance engineering provides an effective route to enhance SHG beyond conventional Q‐only design.
Wenkai Yang, Hao Qin, Boqing Liu, Chuanyu Wang, Yilin Tang, Jiri Janousek, Xueqian Sun, Alex Y. Song, Yuerui Lu   +8 more
wiley   +1 more source

Effects of low-temperature capping on the optical properties of GaAs/AlGaAs quantum wells

Nanoscale Research Letters, 2011
We study the effects of low-temperature capping (200-450°C) on the optical properties of GaAs/AlGaAs quantum wells. Photoluminescence measurements clearly show the formation of abundant nonradiative recombination centers in an AlGaAs capping layer ...
Jo Masafumi, Duan Guotao, Mano Takaaki, Sakoda Kazuaki   +3 more
doaj  

Optoelectronically Active GaAs/GeSn‐MQW/Ge Heterojunctions Created via Semiconductor Grafting

Advanced Optical Materials, Volume 14, Issue 19, 22 May 2026.
Semiconductor Grafting enables a lattice‐mismatched GaAs/GeSn‐MQW/Ge heterojunction with engineered band offsets and optical field distribution. The enlarged conduction and valence band discontinuities govern asymmetric carrier transport, producing bias‐dependent dual‐mode photodetection from visible to near‐infrared wavelengths.
Jie Zhou, Haibo Wang, Yang Liu, Yifu Guo, Alireza Abrand, Yiran Li, Jiarui Gong, Hieu D. Trinh, Po Rei Huang, Jianping Shen, Shengqiang Xu, Daniel Vincent, Samuel Haessly, Yi Lu, Munho Kim, Shui‐Qing Yu, Parsian K. Mohseni, Guo‐En Chang, Zetian Mi, Kai Sun, Xiao Gong, Mikhail A. Kats, Zhenqiang Ma   +22 more
wiley   +1 more source

Label-Free Biomolecule Detection With InP/AlGaAs Charge Plasma Dielectric-Modulated Vertical TFET Using TaN as Metal Gate

IEEE Access
This study introduces a label-free biosensing method for biomolecule detection utilizing an InP/AlGaAs charge plasma dielectric-modulated vertical tunnel field-effect transistor (InP/AlGaAs VTFET) featuring TaN as the metal gate.
Hashim Elshafie, Abdulrahman Saad Alqahtani, Azath Mubarakali, Adarsh Rag S, M. Venkatesh, P. Parthasarathy   +5 more
doaj   +1 more source

Electrically Tunable Room‐Temperature Microwave Oscillations in GaN/AlN Triple‐Barrier Resonant Tunneling Diodes

Advanced Electronic Materials, Volume 12, Issue 9, 11 May 2026.
III‐nitride semiconductors have revolutionized optoelectronics, enabling transformative technologies such as high‐efficiency LEDs and lasers. However, their use in intersubband optoelectronics has remained limited. This work marks an important step forward by demonstrating highly coherent inter‐well resonant tunneling injection in III‐nitride ...
Jimy Encomendero, Naomi Pieczulewski, Eegene Chung, Vladimir Protasenko, David A. Muller, Debdeep Jena, Huili Grace Xing   +6 more
wiley   +1 more source

Effects from a single application of photobiomodulation on pain intensity from perineal trauma related to childbirth: A randomized controlled trial

International Journal of Gynecology &Obstetrics, Volume 173, Issue 2, Page 808-817, May 2026.
Abstract Objective To analyze the effects of a single photobiomodulation (PBM) application on perineal pain and healing in women in the immediate postpartum period. Methods Randomized controlled trial, double‐blind, two‐center, with 60 postpartum women with perineal trauma and pain scoring 4 or more on the Numeric Rating Scale (NRS).
Edna Jéssica Lima Gondim, Simony Lira Nascimento, Maria Victória Candida Gaitero, Ticiana Aparecida Alves Mira, Andrea Vasconcelos Gonçalves, Fernanda Garanhani Surita   +5 more
wiley   +1 more source

Theoretical Modeling of Intensity Noise in InGaN Semiconductor Lasers

The Scientific World Journal, 2014
This paper introduces modeling and simulation of the noise properties of the blue-violet InGaN laser diodes. The noise is described in terms of the spectral properties of the relative intensity noise (RIN).
Moustafa Ahmed
doaj   +1 more source

Numerical study of valence band states evolution in AlxGa1-xAs [111] QDs systems [PDF]

PeerJ Materials Science
Quantum dots (QDs) are very attractive nanostructures from an application point of view due to their unique optical properties. Optical properties and valence band (VB) state character was numerically investigated with respect to the effects of ...
Mikhail Lazarev
doaj   +2 more sources

Evidence of Intersubband Linewidth Narrowing Using Growth Interruption Technique

Photonics, 2019
We report on the systematic study of two main scattering mechanisms on intersubband transitions, namely ionized impurity scattering and interface roughness scattering.
Ngoc Linh Tran, Giorgio Biasiol, Arnaud Jollivet, Alberto Bertocci, François H. Julien, Jean-Michel Manceau, Raffaele Colombelli   +6 more
doaj   +1 more source