Spectral properties of incoherent terahertz torch based on parabolic Ga(As,Bi)/AlGaAs quantum wells

Mindaugas Karaliunas; Justas Pagalys; Vytautas Jakštas; Ričardas Norkus; Andrzej Urbanowicz; Jan Devenson; Renata Butkute; Andres Udal; Gintaras Valušis

doi:10.1117/12.2528428

6 September 2019 Spectral properties of incoherent terahertz torch based on parabolic Ga(As,Bi)/AlGaAs quantum wells

Mindaugas Karaliunas, Justas Pagalys, Vytautas Jakštas, Ričardas Norkus, Andrzej Urbanowicz, Jan Devenson, Renata Butkute, Andres Udal, Gintaras Valušis

Author Affiliations +

Proceedings Volume 11124, Terahertz Emitters, Receivers, and Applications X; 1112409 (2019) https://doi.org/10.1117/12.2528428
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

Incoherent terahertz (THz) sources can be compact, stable, reliable and cheaper alternative to coherent emitters for compact THz systems. Low power of incoherent THz emitters can be compensated by benefit from extremely high sensitivity of THz micro-detectors. Incoherent THz torch device based on Ga(As,Bi)/AlGaAs parabolic quantum well (PQW) is modeled, fabricated and experimentally investigated paying special attention to the THz spectral range and optical properties. The structures for optical characterization were grown using MBE technique on GaAs substrates. The experimental study was carried out to measure the absorption by intersubband transition of electrons in PQW using vacuum Fourier transform spectroscopy, conventional farinfrared Fourier transform spectroscopy and THz time-domain spectroscopy. Transmittance spectra dependence on temperature and photo-excitation of undoped structures for THz torch device is studied exploring impact of the PQW on THz spectra.

Conference Presentation

Citation Download Citation

Mindaugas Karaliunas, Justas Pagalys, Vytautas Jakštas, Ričardas Norkus, Andrzej Urbanowicz, Jan Devenson, Renata Butkute, Andres Udal, and Gintaras Valušis "Spectral properties of incoherent terahertz torch based on parabolic Ga(As,Bi)/AlGaAs quantum wells", Proc. SPIE 11124, Terahertz Emitters, Receivers, and Applications X, 1112409 (6 September 2019); https://doi.org/10.1117/12.2528428

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