Chemistry and Physics Faculty Articles

Title

Highly Efficient Infrared Optical Nonlinearity of a Wide-Bandgap Chalcogenide Li2CdGeS4

Document Type

Article

Publication Date

2014

Publication Title

Optics Letters

ISSN

0146-9592

Volume

39

Issue/No.

15

First Page

4579

Last Page

4582

Abstract

A quaternary chalcogenide Li2CdGeS4 is an excellent candidate for a nonlinear optical (NLO) material exhibiting wide transparency spanning from its fundamental band edge (3.15 eV) to the terahertz regime (23.5 μm). Strong optical nonlinearity of Li2CdGeS4 has been investigated over a wide spectral range 𝜆=1.064–3.3  μm based on second- and third-harmonic generation. The compound has a high damage threshold at λ=1.064  μm because of saturable three-photon absorption, and is phase-matchable for λ>1.5  μm with 𝜒(2)≃50  pm/V. It also exhibits strong third-order nonlinearity of 𝜒(3)≃105  pm2/V2. Li2CdGeS4 is promising for high-power NLO applications in the broad infrared spectrum.

Comments

© 2014 Optical Society of America

ORCID ID

0000-0001-7825-8667

DOI

10.1364/OL.39.004579

This document is currently not available here.

Peer Reviewed

Find in your library

Share

COinS