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Related Experiment Video

Updated: Jun 5, 2025

Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes

Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes

Published on: December 15, 2015

Nonlinear mid-infrared meta-membranes.

Giovanni Sartorello¹, Joshua Bocanegra^2,3, David Knez⁴

¹School of Applied and Engineering Physics, Cornell University, Ithaca, NY 14850, USA.

Nanophotonics (Berlin, Germany)

|December 5, 2024

Summary

This summary is machine-generated.

Free-standing nanophotonic meta-membranes enable enhanced nonlinear optical processes. Shot-controlled fifth harmonic generation measurements reveal significant enhancement in silicon carbide meta-membranes without substrates.

Keywords:

metasurfaces mid-infrared nonlinear optics silicon carbide

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Area of Science:

Nanophotonics
Nonlinear Optics
Materials Science

Background:

Nanophotonic structures offer nanoscale control of nonlinear optical processes.
Substrate-supported nanostructures limit application scope and pose heat dissipation challenges.
Evaluating free-standing nanostructures' nonlinear optical properties is difficult.

Purpose of the Study:

To investigate nonlinear optical properties of free-standing nanostructures.
To demonstrate substrate-less nanophotonic architectures for enhanced nonlinear optics.
To explore fifth harmonic generation (FHG) in a silicon carbide (SiC) meta-membrane.

Main Methods:

Shot-controlled fifth harmonic generation (FHG) measurements on a SiC meta-membrane.
Back focal plane imaging of FHG diffraction orders.
Finite-difference time-domain (FDTD) simulations.
Single-shot measurements with varying resonance positions.

Main Results:

Achieved at least two orders of magnitude enhancement of FHG from the SiC meta-membrane compared to unstructured SiC film.
Demonstrated pronounced optical resonances in the mid-infrared (λres ≈ 4,000 nm).
Observed unusual spectral behavior explained by Kerr-driven intensity-dependent resonance dynamics.

Conclusions:

Developed a method to evaluate nonlinear optical properties of free-standing nanostructures.
The SiC meta-membrane exhibits significantly enhanced FHG, enabling substrate-less nanophotonic applications.
Kerr-driven dynamics are crucial for understanding the observed spectral behavior in resonant nanostructures.