Zobrazeno 1 - 10
of 217
pro vyhledávání: '"Haglund, Richard F."'
Autor:
Brahms, Christian, Zhang, Lin, Shen, Xiao, Bhattacharya, Utso, Recasens, Maria, Osmond, Johann, Grass, Tobias, Chhajlany, Ravindra W., Hallman, Kent A., Haglund, Richard F., Pantelides, Sokrates T., Lewenstein, Maciej, Travers, John C., Johnson, Allan S.
The nature of the insulator-to-metal phase transition in vanadium dioxide (VO2) is one of the longest-standing problems in condensed-matter physics. Ultrafast spectroscopy has long promised to determine whether the transition is primarily driven by t
Externí odkaz:
http://arxiv.org/abs/2402.01266
Autor:
Duan, Xiaoyang, White, Samuel T., Cui, Yuanyuan, Neubrech, Frank, Gao, Yanfeng, Haglund, Richard F., Liu, Na
Publikováno v:
ACS Photonics 7, 11, 2958-2965 (2020)
Reconfigurable optical systems are the object of continuing, intensive research activities, as they hold great promise for realizing a new generation of compact, miniaturized, and flexible optical devices. However, current reconfigurable systems ofte
Externí odkaz:
http://arxiv.org/abs/2104.14232
Achieving ultrafast all-optical switching in a silicon waveguide geometry is a key milestone on the way to an integrated platform capable of handling the increasing demands for higher speed and higher capacity for information transfer. Given the weak
Externí odkaz:
http://arxiv.org/abs/2007.02812
Autor:
Fali, Alireza, White, Samuel T., Folland, Thomas G., He, Mingze., Aghamiri, Neda A., Liu, Song, Edgar, James H., Caldwell, Joshua D., Haglund, Richard F., Abate, Yohannes
Hyperbolic phonon polaritons (HPhPs) are generated when infrared photons couple to polar optic phonons in anisotropic media, confining long-wavelength light to nanoscale volumes. However, to realize the full potential of HPhPs for infrared optics, it
Externí odkaz:
http://arxiv.org/abs/1907.01950
Autor:
Bonacum, Jason P., O'Hara, Andrew, Bao, De-Liang, Ovchinnikov, Oleg S., Zhang, Yan-Fang, Gordeev, Georgy, Arora, Sonakshi, Reich, Stephanie, Idrobo, Juan-Carlos, Haglund, Richard F., Pantelides, Sokrates T., Bolotin, Kirill
Publikováno v:
Phys. Rev. Materials 3, 064004 (2019)
Molecules intercalating two-dimensional (2D) materials form complex structures that have been mostly characterized by spatially averaged techniques. Here we use aberration-corrected scanning transmission electron microscopy and density-functional-the
Externí odkaz:
http://arxiv.org/abs/1903.00753
Autor:
Spear Nathan J., Yan Yueming, Queen Joshua M., Singh Mahi R., Macdonald Janet E., Haglund Richard F.
Publikováno v:
Nanophotonics, Vol 12, Iss 2, Pp 273-284 (2023)
A growing class of nonlinear materials employ the localized surface plasmonic resonance (LSPR) of nanoparticles to enhance harmonic generation. Material systems containing harmonically coupled metallic and semiconductor plasmonic nanoparticles have b
Externí odkaz:
https://doaj.org/article/ee1abc08d1984412afb8eea19b977c22
Autor:
Folland, Thomas G., Fali, Alireza, White, Samuel T., Matson, Joseph R., Liu, Song, Aghamiri, Neda A., Edgar, James H., Haglund, Richard F., Abate, Yohannes, Caldwell, Joshua D.
Publikováno v:
Nature Communicationsvolume 9, Article number: 4371 (2018)
Metasurfaces offer the potential to control light propagation at the nanoscale for applications in both free-space and surface-confined geometries. Existing metasurfaces frequently utilize metallic polaritonic elements with high absorption losses, an
Externí odkaz:
http://arxiv.org/abs/1805.08292
Autor:
Feldman, Matthew A., Dumitrescu, Eugene F., Bridges, Denzel, Chisholm, Matthew F., Davidson, Roderick B., Evans, Philip G., Hachtel, Jordan A., Hu, Anming, Pooser, Raphael C., Haglund, Richard F., Lawrie, Benjamin J.
Publikováno v:
Phys. Rev. B 97, 081404 (2018)
Nanoscale control over the second-order photon correlation function $g^{(2)}(\tau)$ is critical to emerging research in nonlinear nanophotonics and integrated quantum information science. Here we report on quasiparticle control of photon bunching wit
Externí odkaz:
http://arxiv.org/abs/1710.06483
Autor:
Braun, Johannes M., Schneider, Harald, Helm, Manfred, Mirek, Rafał, Boatner, Lynn A., Marvel, Robert E., Haglund, Richard F., Pashkin, Alexej
We utilize near-infrared pump and mid-infrared probe spectroscopy to investigate the ultrafast electronic response of pressurized VO$_2$. Distinct pump-probe signals and a pumping threshold behavior are observed even in the pressure-induced metallic
Externí odkaz:
http://arxiv.org/abs/1708.08913
Phase-change materials (PCMs) have emerged as promising active elements in silicon (Si) photonic systems. In this work, we design, fabricate, and characterize a hybrid Si-PCM optical modulator. By integrating vanadium dioxide (a PCM) within a Si phot
Externí odkaz:
http://arxiv.org/abs/1708.04297