Terahertz quantum-cascade metasurface VECSELs (Conference Presentation)

Benjamin S. Williams; Luyao Xu; Christopher A. Curwen; John L. Reno; Tatsuo Itoh

doi:10.1117/12.2251447

20 April 2017 Terahertz quantum-cascade metasurface VECSELs (Conference Presentation)

Benjamin S. Williams, Luyao Xu, Christopher A. Curwen, John L. Reno, Tatsuo Itoh

Author Affiliations +

Proceedings Volume 10123, Novel In-Plane Semiconductor Lasers XVI; 1012311 (2017) https://doi.org/10.1117/12.2251447
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

Terahertz quantum-cascade vertical external cavity surface emitting laser (VECSELs) are made possible through the development of amplifying reflectarray metasurfaces. The metasurface is made up of sub-wavelength arrays of antenna coupled sub-cavities loaded with quantum-cascade active material. The QC-VECSEL approach allows scaling of laser power while maintaining a high quality, near diffraction limited beam - something which has been a long standing challenge for THz quantum-cascade lasers with sub-wavelength metallic waveguides. The latest results of cavity and metasurface engineering are presented, including the demonstration of a focusing reflectarray metasurface that enables a "flat-optics" hemispherical VECSEL cavity, with improved geometric stability and a Gaussian profile beam with beam quality parameter of M2=1.3.

Conference Presentation

Citation Download Citation

Benjamin S. Williams, Luyao Xu, Christopher A. Curwen, John L. Reno, and Tatsuo Itoh "Terahertz quantum-cascade metasurface VECSELs (Conference Presentation)", Proc. SPIE 10123, Novel In-Plane Semiconductor Lasers XVI, 1012311 (20 April 2017); https://doi.org/10.1117/12.2251447

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE