Microdisk THz quantum-cascade lasers with super-conducting cavities

A. Benz; M. Brandstetter; C. Deutsch; G. Fasching; A. M. Andrews; P. Klang; W. Schrenk; G. Strasser; K. Unterrainer

doi:10.1117/12.860475

19 August 2010 Microdisk THz quantum-cascade lasers with super-conducting cavities

A. Benz, M. Brandstetter, C. Deutsch, G. Fasching, A. M. Andrews, P. Klang, W. Schrenk, G. Strasser, K. Unterrainer

Proceedings Volume 7763, Terahertz Emitters, Receivers, and Applications; 776303 (2010) https://doi.org/10.1117/12.860475
Event: SPIE NanoScience + Engineering, 2010, San Diego, California, United States

Abstract

We present a new waveguide concept for terahertz quantum-cascade laser. The double-metal waveguide confines the active region between two metallic layers. Thereby, a modal confinement of almost 100 % is achieved. However, these metal layers are also one of the dominating loss mechanisms. Replacing the conventional metal with a superconductor helps to reduce the total losses. A surface plasmon is formed at the interface between the superconductor and the semiconductor. It can be maintained even for photon energies above the superconducting band gap. In this work we use niobium with a band gap of 2.8 meV to confine the active region of a THz-QCL emitting at 9 meV.

Citation Download Citation

A. Benz, M. Brandstetter, C. Deutsch, G. Fasching, A. M. Andrews, P. Klang, W. Schrenk, G. Strasser, and K. Unterrainer "Microdisk THz quantum-cascade lasers with super-conducting cavities", Proc. SPIE 7763, Terahertz Emitters, Receivers, and Applications, 776303 (19 August 2010); https://doi.org/10.1117/12.860475

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

Includes PDF, HTML & Video, when available