Monolithic echoless photoconductive switches for high-resolution terahertz time-domain spectroscopy (Conference Presentation)

Kenneth Maussang; José Palomo; Jean-Michel Manceau; Raffaele Colombelli; Isabelle Sagnes; Lianhe H. Li; Edmund H. Linfield; Giles A. Davies; Juliette Mangeney; Jerome Tignon; Sukhdeep Dhillon

doi:10.1117/12.2287878

14 March 2018 Monolithic echoless photoconductive switches for high-resolution terahertz time-domain spectroscopy (Conference Presentation)

Kenneth Maussang, José Palomo, Jean-Michel Manceau, Raffaele Colombelli, Isabelle Sagnes, Lianhe H. Li, Edmund H. Linfield, Giles A. Davies, Juliette Mangeney, Jerome Tignon, Sukhdeep Dhillon

Author Affiliations +

Proceedings Volume 10540, Quantum Sensing and Nano Electronics and Photonics XV; 1054022 (2018) https://doi.org/10.1117/12.2287878
Event: SPIE OPTO, 2018, San Francisco, California, United States

Abstract

Interdigitated photoconductive (iPC) switches [1] are powerful and convenient devices for time-resolved spectroscopy, with the ability to operate both as sources and detectors of terahertz (THz) frequency pulses. However, reflection of the emitted or detected radiation within the device substrate itself can lead to echoes that inherently limits the spectroscopic resolution achievable from their use in time-domain spectroscopy (TDS) systems. In this work, we demonstrate a design of low-temperature-grown-GaAs (LT-GaAs) iPC switches for THz pulse detection that suppresses such unwanted echoes [2]. This is realized through the growth of a buried multilayer LT-GaAs structure that retains its ultrafast properties, which after wafer bonding to a metal-coated host substrate, results in an iPC switch with a metal plane buried at a subwavelength depth below the LT-GaAs surface. Using this device as a detector, and coupling it to an echo-less iPC source [3], enables echo-free THz-TDS and high-resolution spectroscopy, with a resolution limited only by the temporal length of the measurement governed by the mechanical delay line used. As a proof-of-principle, the 2(12)-2(21) and the 1(01)-2(12) rotational lines of water vapor have been spectrally resolved, demonstrating a spectral resolution below 10 GHz. [1] A. Dreyhaupt, S. Winnerl, T. Dekorsy, M. Helm, Appl. Phys. Lett. 86, 121114 (2005) [2] K. Maussang, J. Palomo, J.-M. Manceau, R. Colombelli, I. Sagnes, L. H. Li, E. H. Linfield, A. G. Davies, J. Mangeney, J. Tignon, and S. S. Dhillon, Appl. Phys. Lett. 110, 141102 (2017). [3] K. Maussang, A. Brewer, J. Palomo, J.-M. Manceau, R. Colombelli, I. Sagnes, J. Mangeney, J. Tignon, S.S. Dhillon, IEEE Trans. Terahertz Sci. Technol. 6, 20 (2016)

Conference Presentation

Citation Download Citation

Kenneth Maussang, José Palomo, Jean-Michel Manceau, Raffaele Colombelli, Isabelle Sagnes, Lianhe H. Li, Edmund H. Linfield, Giles A. Davies, Juliette Mangeney, Jerome Tignon, and Sukhdeep Dhillon "Monolithic echoless photoconductive switches for high-resolution terahertz time-domain spectroscopy (Conference Presentation)", Proc. SPIE 10540, Quantum Sensing and Nano Electronics and Photonics XV, 1054022 (14 March 2018); https://doi.org/10.1117/12.2287878

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Spectroscopes

Switches

Terahertz spectroscopy

Imaging spectroscopy

Terahertz radiation

Sensors

Reflection

Show All Keywords

Keywords/Phrases

Search In:

Publication Years