Zobrazeno 1 - 10
of 77
pro vyhledávání: '"West Kenneth W."'
Autor:
Yoo Changyun, Sherwin Mark S., West Kenneth W., Pfeiffer Loren N., Kawamura Jonathan H., Karasik Boris S.
Publikováno v:
Nanophotonics, Vol 13, Iss 10, Pp 1711-1723 (2024)
We investigate the THz intersubband absorption behavior of a single 40-nm wide GaAs/AlGaAs square quantum well (QW) using Johnson noise thermometry. In our measurements, the Johnson noise associated with intersubband absorption is measured from the i
Externí odkaz:
https://doaj.org/article/4808b3f5bfb74ed9a9f63cfd787671b3
Autor:
Yoo, Changyun, West, Kenneth W., Pfeiffer, Loren N., Curwen, Chris A., Kawamura, Jonathan H., Karasik, Boris S., Sherwin, Mark S.
We present a reliable flip-chip technique for dual-side processing of thin (<1 micron) high-mobility GaAs/AlGaAs epitaxial layers. The technique allows the fabrication of small (micron-scale with standard UV photolithography) patterned back gates and
Externí odkaz:
http://arxiv.org/abs/2302.11057
Autor:
Kumar, Arvind Shankar, Liu, Chieh-Wen, Liu, Shuhao, Pfeiffer, Loren N., West, Kenneth W., Levchenko, Alex, Gao, Xuan P. A.
Publikováno v:
Phys. Rev. Lett. 130, 266302 (2023)
Fermi liquid theory has been a foundation in understanding the electronic properties of materials. For weakly interacting two-dimensional (2D) electron or hole systems, electron-electron interactions are known to introduce quantum corrections to the
Externí odkaz:
http://arxiv.org/abs/2105.06502
Autor:
Jang, Joonho, Yoo, Heun Mo, Pfeiffer, Loren N., West, Kenneth W., Baldwin, K. W., Ashoori, Raymond C.
We introduce a design of electrically isolated floating bilayer GaAs quantum wells (QW) in which application of a large gating voltage controllably and highly reproducibly induces charges that remain trapped in the bilayer after removal of the gating
Externí odkaz:
http://arxiv.org/abs/2103.06488
Autor:
Wang, Ying, Ponomarenko, Vadim, West, Kenneth W., Baldwin, Kirk, Pfeiffer, Loren N., Lyanda-Geller, Yuli, Rokhinson, Leonid P.
Publikováno v:
Nature Communications 12, 5312 (2021)
Domain walls in fractional quantum Hall ferromagnets are gapless helical one-dimensional channels formed at the boundaries of topologically distinct quantum Hall (QH) liquids. Na\"{i}vely, these helical domain walls (hDWs) constitute two counter-prop
Externí odkaz:
http://arxiv.org/abs/2101.00126
Autor:
Snoke David W., Pfeiffer Loren N., Nelsen Bryan, Steinberg Aephraim M., van Driel Henry M., Darabi Ardavan, Rozema Lee A., Hayat Alex, Lange Christoph, West Kenneth W.
Publikováno v:
EPJ Web of Conferences, Vol 41, p 04003 (2013)
We demonstrate ultrafast phase control of exciton-polaritons in a GaAs/AlGaAs strongly coupled microcavity exploiting the ac Stark effect. Our approach yields meV-scale shifts without carrier generation, providing a powerful tool towards control of p
Externí odkaz:
https://doaj.org/article/a40ac643a03d4428ad278b9a323c3eb6
Autor:
Chung, Yoon Jang, Baldwin, Kirk W., West, Kenneth W., Haug, Nicholas, van de Wetering, Johannes, Shayegan, Mansour, Pfeiffer, Loren N.
Publikováno v:
Nano Letters, 19 (3), 1908
We have developed a scanning photoluminescence technique that can directly map out the local two-dimensional electron density with a relative accuracy of $\sim2.2\times10^8$ cm$^{-2}$. The validity of this approach is confirmed by the observation of
Externí odkaz:
http://arxiv.org/abs/1903.11527
Autor:
Wu, Tailung, Kazakov, Aleksandr, Simion, George, Wan, Zhong, Liang, Jingcheng, West, Kenneth W., Baldwin, Kirk, Pfeiffer, Loren N., Lyanda-Geller, Yuli, Rokhinson, Leonid P.
Publikováno v:
Phys. Rev. B 97, 245304 (2018)
We propose an experimentally-feasible system based on spin transitions in the fractional quantum Hall effect regime where parafermions, high-order non-abelian excitations, can be potentially realized. We provide a proof-of-concept experiments showing
Externí odkaz:
http://arxiv.org/abs/1709.07928
Publikováno v:
Nature Physics 13, 340-344 (2017)
Photoemission and tunneling spectroscopies measure the energies at which single electrons can be added to or removed from an electronic system. Features observed in such spectra have revealed electrons coupling to vibrational modes of ions both in so
Externí odkaz:
http://arxiv.org/abs/1604.06220
Autor:
Hayat, Alex, Lange, Christoph, Rozema, Lee A., Chang, Rockson, Potnis, Shreyas, van Driel, Henry M., Steinberg, Aephraim M., Steger, Mark, Snoke, David W., Pfeiffer, Loren N., West, Kenneth W.
We demonstrate macroscopic coherence between quantum condensates generated at different times, separated by more than the particle dephasing time. This is possible due to the dressed light-matter nature of exciton-polaritons, which can be injected re
Externí odkaz:
http://arxiv.org/abs/1310.0010