Year: 2026
Type: preprint
Abstract: We present a theoretical framework, based on the Green's tensor quantization method, to describe third-harmonic generation in epsilon-near-zero (ENZ) materials and derive analytical, closed-form solutions for the generation efficiency. We validate our model against experimental measurements of wavelength- and angle-resolved third-harmonic generation efficiency from 30 nm-thin ITO nanolayers at low pump intensity, described under the undepleted pump approximation. Our results provide a local and scalar effective model for quantum nonlinear processes in dispersive and lossy ENZ media, and establishes a simple and reliable framework for investigating a variety of nonlinear optical phenomena with applications to quantum sensing, quantum information, and quantum nondemolition measurements.
Source: arXiv (Cornell University)
Institutions: Tampere University, Boston University
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Funder: Army Research Office
OpenAlex ID: W7202248396