This Conference Presentation, “Guiding light with surface exciton-polaritons in atomically thin superlattices,” was recorded at Photonics Europe 2022 held in Strasbourg, France.
The SmartComb is a fully automated, easy to use optical frequency comb in a compact, 19" rack-mountable design. It contains all optics and locking electronics needed to provide fully stabilized comb light around 1560 nm. Optics for up to 2 additional measurement wavelengths can be included on request. Further extensions are available to provide higher powers, customized spectra and pulse lengths. Optical frequency combs are the only devices which are capable of measuring optical frequencies (rather than wavelengths) by coherently linking them to the radio frequency or microwave range. This unique feature enables the comb to act as a frequency ruler, a universal optical frequency reference for continuous wave lasers, a clockwork for optical clocks, or as a source of ultra-stable microwaves, to name only a few applications. In our product demonstration video we present the SmartComb, its control software and how to measure the frequency of a continuous wave laser precisely, in the simplest possible way.
KEYWORDS: Solid state electronics, Ultrafast phenomena, Chemical species, Harmonic generation, Crystals, Systems modeling, Ultraviolet radiation, Light sources, Chemical reactions, Tomography
The observation of higher-order harmonic generation (HHG) from bulk crystals has stimulated significant
efforts to understand the involved mechanisms and their analogue to the intuitive three-step recollision model of
gas phase HHG. On the technological side, efficient solid-state HHG is anticipated to enable compact
attosecond and ultraviolet light sources that could unveil electron dynamics in chemical reactions and provide
sharper tomographic imaging of molecular orbitals. Here we explore the roles of electronic band structure
and Coulomb interactions in solid-state HHG by studying the optical response of linear atomic chains to intense
ultrashort pulses. Specifically, we simulate electron dynamics in monoatomic chains by solving the
single-particle density matrix equation of motion, incorporating tight-binding electronic states and a self-consistent
electron-electron interaction, in the presence of intense ultrafast optical fields. While linear atomic chains
constitute an idealized system, our realistic 1D model readily provides insight related to the time-evolution of
electronic states in reciprocal space, both in the absence or presence of electron interactions, which we
demonstrate to play an important role in the HHG yield. Our findings apply directly to extreme nonlinear optical
phenomena in atoms on surfaces, linear arrays of dopant atoms in semiconductors, and linear molecules, such as
polycyclic aromatic hydrocarbon chains, and can be straightforwardly extended to optimize existing or identify
new solid-state platforms for HHG.
The short wavelength of graphene plasmons relative to the light wavelength makes them attractive for
applications in optoelectronics and sensing. However, this property limits their coupling to external
light and our ability to create and detect them. More efficient ways of generating plasmons are therefore
desirable. Here we demonstrate through realistic theoretical simulations that graphene plasmons can be
efficiently excited via electron tunneling in a sandwich structure formed by two graphene monolayers
separated by a few atomic layers of hBN. We predict plasmon generation rates of ~ 10^12 - 10^14 1/s over
an area of the squared plasmon wavelength for realistic values of the spacing and bias voltage,
while the yield (plasmons per tunneled electron) has unity order [1]. Our results support electrical
excitation of graphene plasmons in tunneling devices as a viable mechanism for the development of
optics-free ultrathin plasmonic devices.
[1] S. de Vega and F. J. García de Abajo, ACS. Phot. 4 (2017)
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.