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18 papers
Visualization of Band Shifting and Interlayer Coupling in WxMo1-xS2 Alloys using Near-Field Broadband Absorption Microscopy
Po-Wen Tang, Shiue-Yuan Shiau, He-Chun Chou +5
Beyond-diffraction-limit optical absorption spectroscopy provides profound information on the graded band structures of composition-spread and stacked two-dimensional materials, in…
Observation of exciton-exciton interaction mediated valley depolarization in monolayer MoSe
Fahad Mahmood, Zhanybek Alpichshev, Yi-Hsien Lee +2
The valley pseudospin in monolayer transition metal dichalcogenides (TMDs) has been proposed as a new way to manipulate information in various optoelectronic devices. This relies o…
Strong and broadly tunable plasmon resonances in thick films of aligned carbon nanotubes
Kuan-Chang Chiu, Abram L. Falk, Po-Hsun Ho +5
Low-dimensional plasmonic materials can function as high quality terahertz and infrared antennas at deep subwavelength scales. Despite these antennas' strong coupling to electromag…
Large, valley-exclusive Bloch-Siegert shift in monolayer WS2
Edbert J. Sie, Chun Hung Lui, Yi-Hsien Lee +3
Coherent light-matter interaction can be used to manipulate the energy levels of atoms, molecules and solids. When light with frequency ω is detuned away from a resonance ωo, repul…
Observation of intervalley biexcitonic optical Stark effect in monolayer WS2
Edbert J. Sie, Chun Hung Lui, Yi-Hsien Lee +2
Coherent optical dressing of quantum materials offers technological advantages to control their electronic properties, such as the electronic valley degree of freedom in monolayer…
Coherent plasmon and phonon-plasmon resonances in carbon nanotubes
Abram L. Falk, Kuan-Chang Chiu, Damon B. Farmer +5
Carbon nanotubes provide a rare access point into the plasmon physics of one-dimensional electronic systems. By assembling purified nanotubes into uniformly sized arrays, we show t…