Near-field imaging and spectroscopy of terahertz resonators and metasurfaces

LL Hale, T Siday, O Mitrofanov - Optical Materials Express, 2023‏ - opg.optica.org
Terahertz (THz) metasurfaces have become a key platform for engineering light-matter
interaction at THz frequencies. They have evolved from simple metallic resonator arrays into …

Near-field spectroscopy of individual asymmetric split-ring terahertz resonators

Y Lu, LL Hale, AM Zaman, SJ Addamane, I Brener… - ACS …, 2023‏ - ACS Publications
Metamaterial resonators have become an efficient and versatile platform in the terahertz
frequency range, finding applications in integrated optical devices, such as active …

Unveiling the symmetry protection of bound states in the continuum with terahertz near-field imaging

NJJ van Hoof, DR Abujetas, SET Ter Huurne… - ACS …, 2021‏ - ACS Publications
Bound states in the continuum (BICs) represent a new paradigm in photonics due to the full
suppression of radiation losses. However, this suppression has also hampered the direct …

Non-contact imaging of terahertz surface currents with aperture-type near-field microscopy

S Norman, J Seddon, Y Lu, L Hale, A Zaman… - Optics …, 2024‏ - opg.optica.org
Terahertz (THz) near-field imaging and spectroscopy provide valuable insights into the
fundamental physical processes occurring in THz resonators and metasurfaces on the …

[HTML][HTML] Near-field spectroscopy of Dirac plasmons in Bi2Se3 ribbon arrays

LL Hale, Z Wang, CT Harris, I Brener, S Law… - APL Photonics, 2023‏ - pubs.aip.org
Plasmons supported in the massless electron surface states of topological insulators (TIs),
known as Dirac plasmons, have great potential in next generation optoelectronics. However …

[HTML][HTML] Tailored nano-electronics and photonics with two-dimensional materials at terahertz frequencies

L Viti, MS Vitiello - Journal of Applied Physics, 2021‏ - pubs.aip.org
The discovery of graphene and its fascinating capabilities has triggered an unprecedented
interest in inorganic two-dimensional (2D) materials. van der Waals layered materials such …

Noninvasive near‐field spectroscopy of single subwavelength complementary resonators

LL Hale, J Keller, T Siday, RI Hermans… - Laser & Photonics …, 2020‏ - Wiley Online Library
Subwavelength metallic resonators provide a route to achieving strong light–matter coupling
by means of tight confinement of resonant electromagnetic fields. Investigation of such …

Observation of intersubband polaritons in a single nanoantenna using nano-FTIR spectroscopy

CF Wang, TG Habteyes, TS Luk, JF Klem, I Brener… - Nano Letters, 2019‏ - ACS Publications
Strong coupling of an intersubband (ISB) electron transition in quantum wells to a
subwavelength plasmonic nanoantenna can give rise to intriguing quantum phenomena …

Near-field quantum nanoscopy in the far-infrared enabled by quantum cascade lasers: opinion

MS Vitiello - Optical Materials Express, 2023‏ - opg.optica.org
In this opinion article, I summarize some of the recent developments in the field of near-field
nanoscopy of quantum materials in the far-infrared, highlighting the key role of the quantum …

Nanospectroscopy of a single patch antenna strongly coupled to a mid-infrared intersubband transition in a quantum well

R Gillibert, M Malerba, D Spirito, V Giliberti, L Li… - Applied Physics …, 2020‏ - pubs.aip.org
Scanning-probe-assisted mid-infrared nano-spectroscopy is employed to reveal the
polaritonic dispersion of individual MIM (metal-insulator-metal) square patch antennas …