Enhanced dual function of Ag nanoparticles decorated one-dimensional polymorphic TiO2 composites for sustainable environmental applications by Yuan-Chang Liang, Chih-Chen Kuo

“…Also, Ag nanoparticles contribute the hot electron to enhance the synergy effect in the anatase-TiO2/rutile-TiO2 to prevent recombination of photoinduced carriers under irradiation, thereby strengthening the photocatalytic characteristics. …”
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Design Architectures of the CMOS Power Amplifier for 2.4 GHz ISM Band Applications: An Overview by Mohammad Arif Sobhan Bhuiyan, Md Torikul Islam Badal, Mamun Bin Ibne Reaz, Maria Liz Crespo, Andres Cicuttin

“…However, current PA designs in nanometer and micrometer complementary metal−oxide semiconductor (CMOS) technology present inevitable drawbacks, such as oxide breakdown and hot electron effect. A well-defined architecture, including a linear and simple functional block synthesis, is critical in designing CMOS PA for various applications. …”
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8-beam local oscillator array at 47 THz generated by a phase grating and a quantum cascade laser by Mirzaei, B, Silva, JRG, Hayton, D, Groppi, C, Kao, TY, Hu, Q, Reno, JL, Gao, JR

“…By injecting one of the eight diffracted 4.7 THz beams into a superconducting hot electron bolometer (HEB) mixer, we find that the coupled power, taking the optical loss into account, is in consistency with the QCL power value.…”
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Out-of-equilibrium criticalities in graphene superlattices by Berdyugin, Alexey I, Xin, Na, Gao, Haoyang, Slizovskiy, Sergey, Dong, Zhiyu, Bhattacharjee, Shubhadeep, Kumaravadivel, P, Xu, Shuigang, Ponomarenko, LA, Holwill, Matthew, Bandurin, DA, Kim, Minsoo, Cao, Yang, Greenaway, MT, Novoselov, KS, Grigorieva, IV, Watanabe, K, Taniguchi, T, Fal’ko, VI, Levitov, LS, Kumar, Roshan Krishna, Geim, AK

“…Key signatures of the out-of-equilibrium state are current-voltage characteristics that resemble those of superconductors, sharp peaks in differential resistance, sign reversal of the Hall effect, and a marked anomaly caused by the Schwinger-like production of hot electron-hole plasma. The observed behavior is expected to be common to all graphene-based superlattices.…”
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Quasiparticle lifetimes in magnesium clusters modeled by self-consistent GWΓ calculations by He, Yi, Zeng, Taofang

“…In the high-excitation-energy regime, scaled lifetimes of hot electrons converge to the range of 21–24 fs eV[superscript 2]. …”
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Terahertz heterodyne spectrometer using a quantum cascade laser by Ren, Y., Hovenier, J. N., Higgins, R., Gao, J. R., Klapwijk, T. M., Shi, S. C., Bell, A., Klein, B., Williams, B. S., Kumar, S., Reno, J. L., Hu, Qing

“…A terahertz (THz) heterodyne spectrometer is demonstrated based on a quantum cascade laser(QCL) as a local oscillator (LO) and an NbN hot electron bolometer as a mixer, and it is used to measure high-resolution molecular spectral lines of methanol (CH[subscript 3]OH) between 2.913–2.918 THz. …”
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Stabilized HEB-QCL heterodyne spectrometer at super-terahertz by Ren, Y., Hayton, D. J., Hovenier, J. N., Cui, M., Gao, J. R., Klapwijk, T. M., Shi, S. C., Kao, Tsung-Yu, Hu, Q., Reno, J. L.

“…We report a new experiment on a high-resolution heterodyne spectrometer using a 3.5 THz quantum cascade laser (QCL) as local oscillator (LO) and a superconducting hot electron bolometer (HEB) as mixer by stabilizing both frequency and amplitude of the QCL. …”
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Schottky Barrier and Surface Plasmonic Resonance Phenomena Towards the Photocatalytic Reaction: Study of Their Mechanisms to Enhance Photocatalytic Activity by Khan, Maksudur R., Chuan, Tan Wooi, Yousuf, Abu, Chowdhury, M. N. K., Cheng, C. K.

“…While SPR has the ability to create an electromagnetic field which can improve the photoreaction in three ways: photon scattering, Plasmon Resonance Energy Transfer (PRET) and hot electron excitation. Although both phenomena have been well grounded throughout the field, one crucial ambiguity is still found based on the proposed mechanisms, specifically, what is the direction of electron flow – from metal to semiconductor or vice versa? …”
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Microscopic theory of ultrafast dynamics of carriers photoexcited by THz and near-infrared linearly polarized laser pulses in graphene by B Y Sun, M W Wu

“…When the pump-photon energy is high enough (with the oscillation period much smaller than the pulse width and the scattering time), the influence of the drift term is shown to be negligible and the isotropic hot-electron Fermi distribution with separate conduction- and valence-band chemical potentials is established under scattering during the linearly polarized laser pulse investigated here. …”
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The Effect of the Mid‐Shell Thickness on the Charge‐Carrier Dynamics of the Green‐Light Emitting InP/ZnSe/ZnS Core‐Shell Quantum Dots by Dong‐gu Kang, Yu‐Ho Won, Chanho Park, Yongseok Han, Sang Kyu Kim

“…Auger‐type cooling of hot electron into the band‐edge level of InP is clearly manifested in the TA spectra, giving its time constant of ≈222, 300, or 349 fs for gQD‐20, gQD‐24, or gQD‐33, respectively, indicating that the state‐filling to the 1S(e) of InP is significantly slowed down with the increase of the mid shell thickness. …”
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An Electrochromic Ag-Decorated WO_3−x Film with Adjustable Defect States for Electrochemical Surface-Enhanced Raman Spectroscopy by Siqi Qu, Jing Guan, Dongqi Cai, Qianshuo Wang, Xiuyun Wang, Wei Song, Wei Ji

“…Especially, the use of electrochromic WO_3−x film suppresses the influence of hot-electrons-induced catalysis while offering a reliable SERS effect. …”
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Thermal gating of charge currents with Coulomb coupled quantum dots by H Thierschmann, F Arnold, M Mittermüller, L Maier, C Heyn, W Hansen, H Buhmann, L W Molenkamp

“…We have observed thermal gating, i.e. electrostatic gating induced by hot electrons. The effect occurs in a device consisting of two capacitively coupled quantum dots. …”
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3.5 Thz Quantum Cascade Laser at 70 K as Local Oscillator by Ren, Y., de Visser, P. J., Hovenier, J. N., Zhang, W., Gao, J. R., Klapwijk, T. M., Shi, S. C., Kao, T.-Y., Kumar, S., Reno, J. L., Hu, Qing

“…We report a set of measurements to demonstrate a new type of surface emitting distributed feedback (DFB) quantum cascade laser (QCL) operated at 3.5 THz as a local oscillator by pumping a superconducting hot-electron bolometer (HEB) mixer. Based on the Bragg gratings incorporated into the waveguide, the second order DFB surface emitting THz QCL shows single mode emission at 3.555 THz, which is only 4 GHz off from the hydroxyl (OH) line. …”
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Frequency Locking of a 3.5 Thz Quantum Cascade Laser Using a Gas Cell by Ren, Y., Hovenier, J. N., Cui, M., Hayton, D. J., Gao, J. R., Klapwijk, T. M., Shi, S. C., Kao, T.-Y., Hu, Qing, Reno, J. L.

“…We first present the study of the noise of the THz QCL with the contribution from both the frequency and amplitude domain, by using a NbN superconducting hot-electron bolometer as a power detector. We then present the frequency locking measurement with a lock-in amplifier registering the derivate curve of the absorption line and a proportional-integral-derivative (PID) controller generating the feedback signal. …”
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A 4.7THz heterodyne receiver for a balloon borne telescope by Hayton, D. J., Kloosterman, J. L., Ren, Y., Gao, J. R., Klapwijk, T. M., Hu, Q., Walker, C. K., Reno, J. L., Kao, T.-Y., Hu, Qing

“…We report on the performance of a high sensitivity 4.7 THz heterodyne receiver based on a NbN hot electron bolometer mixer and a quantum cascade laser (QCL) as local oscillator. …”
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Evaluation and Reliability Assessment of GaN-on-Si MIS-HEMT for Power Switching Applications by Chou, Po-Chien, Chen, Szu-Hao, Hsieh, Ting-En, Cheng, Stone, Chang, Edward, del Alamo, Jesus A

“…Changes of direct current (DC) figures of merit in voltage step-stress experiments are measured, statistics are studied, and correlations are investigated. Hot electron stress produces permanent change which can be attributed to charge trapping phenomena and the generation of deep levels or interface states. …”
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81 supra-THz beams generated by a Fourier grating and a quantum cascade laser by Khalatpour, Ali, Hu, Qing

“…For an array of equal superconducting hot electron bolometer mixers, 64 out of 81 beams can pump the HEB mixers with similar power, resulting in receiver sensitivities within 10%. …”
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Fast thermal relaxation in cavity-coupled graphene bolometers with a Johnson noise read-out by Efetov, Dmitri K, Shiue, Ren-Jye, Gao, Yuanda, Skinner, Brian, Walsh, Evan D, Choi, Hyeongrak, Zheng, Jiabao, Tan, Cheng, Grosso, Gabriele, Peng, Cheng, Hone, James, Fong, Kin Chung, Englund, Dirk

“…Here, we introduce an integrated hot-electron bolometer based on Johnson noise readout of electrons in ultra-clean hexagonal-boron-nitride-encapsulated graphene, which is critically coupled to incident radiation through a photonic nanocavity with Q = 900. …”
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RF breakdown effects in microwave power amplifiers by Arumilli, Gautham Venkat

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A model for the critical voltage for electrical degradation of GaN high electron mobility transistors by Joh, Jungwoo, del Alamo, Jesus A.

“…All of our findings are consistent with a degradation mechanism based on crystallographic-defect formation due to the inverse piezoelectric effect. Hot-electron-based mechanisms seem to be in contradiction with our experimental results.…”
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