2026 CAP Congress / Congrès de l'ACP 2026

Session

(DAMOPC) M1-3 | (DPAMPC)

M1-3

22 Jun 2026, 10:15

U. Ottawa - Learning Crossroads (CRX) Building

756. Enhanced THz gas spectroscopy using hollow-core THz fibre.

SUBHROJYOTI BHATTACHARYA (University of Ottawa)

22/06/2026, 10:15

Atomic, Molecular and Optical Physics, Canada / Physique atomique, moléculaire et photonique, Canada (DAMOPC-DPAMPC)

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

Terahertz spectroscopy provides a powerful means of identifying gas-phase molecules through their characteristic spectral signatures. However, several technical hurdles still limit sensitive monitoring and high-frequency resolution, both of which are essential for distinguishing different gas species. While increasing the light-sample interaction length is beneficial, the relatively large beam...

752. Real-time pump-probe characterization of laser-induced glucose melting.

SUBHROJYOTI BHATTACHARYA (University of Ottawa)

22/06/2026, 10:30

Atomic, Molecular and Optical Physics, Canada / Physique atomique, moléculaire et photonique, Canada (DAMOPC-DPAMPC)

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

Organic materials are the building blocks of life. From simple molecules such as glucose to complex proteins and DNA, these organic compounds drive essential processes that make life possible. Many of these processes involve thermally induced phase transitions - rapid structural or chemical changes occurring on very short timescales, many ranging from milliseconds to microseconds. The...

735. Nonlinear guided-wave terahertz generation and detection for high-speed communications

HESAM HEYDARIAN (Department of Physics, University of Ottawa)

22/06/2026, 10:45

Atomic, Molecular and Optical Physics, Canada / Physique atomique, moléculaire et photonique, Canada (DAMOPC-DPAMPC)

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

We demonstrate compact terahertz (THz) components that combine a photonic crystal waveguide with a plasmonic bull’s-eye coupler. The waveguide, formed by a pattern of laser-written holes that extend through the thickness of a GaP window, allows efficient THz generation through optical rectification of a co-propagating near-infrared pulse. A similar waveguiding structure allows sensitive...

734. Terahertz spectroscopy over 25 THz bandwidth enabled by BNA crystals and a single-ring-fiber pulse compressor

Wei Cui (University of Ottawa)

22/06/2026, 11:00

Atomic, Molecular and Optical Physics, Canada / Physique atomique, moléculaire et photonique, Canada (DAMOPC-DPAMPC)

Oral (Non-Student) / Orale (non-étudiant(e))

Terahertz time-domain spectroscopy (THz-TDS) is a non-invasive technique capable of probing the complex dielectric properties of a wide range of organic and inorganic materials. When combined with an ultrafast pump pulse, THz-TDS systems enable the investigation of nonequilibrium excitations in semiconductors, superconductors, topological insulators, Dirac and Weyl semimetals, heavy-fermion...

726. Efficient THz‑to‑NIR upconversion in BNA for quantum-level THz detection

Aswin Vishnu Radhan (University of Ottawa)

22/06/2026, 11:15

Atomic, Molecular and Optical Physics, Canada / Physique atomique, moléculaire et photonique, Canada (DAMOPC-DPAMPC)

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

Nonlinear frequency upconversion of terahertz (THz) radiation into the near infrared (NIR) or visible offers a highly sensitive approach to THz detection. This method is particularly appealing because it avoids the need for bulky cryogenic systems to suppress thermal background noise. Considerable effort has gone into developing nonlinear THz detection schemes, exploring a wide range of...

935. THz high-harmonic generation in graphene-based materials: from engineered THG enhancement to symmetry-forbidden emission

Ali Maleki (University of Ottawa)

22/06/2026, 11:30

Atomic, Molecular and Optical Physics, Canada / Physique atomique, moléculaire et photonique, Canada (DAMOPC-DPAMPC)

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

Terahertz (THz) nonlinear optics is an emerging platform for studying strong-field light-matter interactions at low photon energies[1]. Because THz photon energies are far below typical interband transition energies, nonlinear responses are governed primarily by THz-driven thermodynamic response of the background Dirac carriers. In this regime, intraband acceleration of residual carriers and...

732. Towards fast and sensitive terahertz detection for high-speed wireless communications

Eeswar Yalavarthi (University of Ottawa)

22/06/2026, 11:45

Atomic, Molecular and Optical Physics, Canada / Physique atomique, moléculaire et photonique, Canada (DAMOPC-DPAMPC)

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

The continuous surge in internet usage and the growing demand for higher data-transfer rates are driving the exploration of new, unallocated frequency bands, pushing research toward higher frequencies in the terahertz (THz) range. THz frequencies offer exceptionally wide bandwidths capable of supporting data-transfer rates of the order of terabits per second. The realization of high-speed THz...