Electronically tunable aperiodic distributed feedback terahertz lasers

O. P. Marshall; Subhasish Chakraborty; Md Khairuzzaman; T. Folland; A. Gholinia; H. E. Beere; D. A. Ritchie

doi:10.1063/1.4807636

Electronically tunable aperiodic distributed feedback terahertz lasers

O. P. Marshall, Subhasish Chakraborty^* (Lead), Md Khairuzzaman, T. Folland, A. Gholinia, H. E. Beere, D. A. Ritchie

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

194 Downloads (Pure)

Abstract

Focussed ion beam milling can be used to introduce aperiodic distributed feedback (ADFB) gratings into fully packaged, operational terahertz (THZ) quantum cascade lasers to achieve electronically controlled, discretely tunable laser emission. These aperiodic gratings - designed using computer-generated hologram techniques - consist of multiple slits in the surface plasmon waveguide, distributed along the length of the laser cavity. Tuning behaviour and output power in ADFB lasers operating around 2.9 THz are investigated with a variety of slit dimensions and grating scales. Mode selectivity and grating losses are found to be strongly dependent on milling depth into the upper waveguide layers, dramatically increasing as the metallic layers are penetrated, then rising more slowly with deeper milling into the laser active region. Grating scale and placement along the laser cavity length are also shown to influence mode selection. © 2013 AIP Publishing LLC.

Original language	English
Article number	203103
Journal	Journal of Applied Physics
Volume	113
Issue number	20
DOIs	https://doi.org/10.1063/1.4807636
Publication status	Published - 28 May 2013

Access to Document

10.1063/1.4807636

POST-PEER-REVIEW-NON-PUBLISHERS.PDFAccepted author manuscript, 1.78 MB
POST-PEER-REVIEW-PUBLISHERS.PDFFinal published version, 2.25 MB

Cite this

@article{507fe0d8073c402886c6ea4c96fb798e,

title = "Electronically tunable aperiodic distributed feedback terahertz lasers",

abstract = "Focussed ion beam milling can be used to introduce aperiodic distributed feedback (ADFB) gratings into fully packaged, operational terahertz (THZ) quantum cascade lasers to achieve electronically controlled, discretely tunable laser emission. These aperiodic gratings - designed using computer-generated hologram techniques - consist of multiple slits in the surface plasmon waveguide, distributed along the length of the laser cavity. Tuning behaviour and output power in ADFB lasers operating around 2.9 THz are investigated with a variety of slit dimensions and grating scales. Mode selectivity and grating losses are found to be strongly dependent on milling depth into the upper waveguide layers, dramatically increasing as the metallic layers are penetrated, then rising more slowly with deeper milling into the laser active region. Grating scale and placement along the laser cavity length are also shown to influence mode selection. {\textcopyright} 2013 AIP Publishing LLC.",

author = "Marshall, {O. P.} and Subhasish Chakraborty and Md Khairuzzaman and T. Folland and A. Gholinia and Beere, {H. E.} and Ritchie, {D. A.}",

year = "2013",

month = may,

day = "28",

doi = "10.1063/1.4807636",

language = "English",

volume = "113",

journal = "Journal of Applied Physics",

issn = "1089-7550",

publisher = "American Institute of Physics",

number = "20",

}

TY - JOUR

T1 - Electronically tunable aperiodic distributed feedback terahertz lasers

AU - Marshall, O. P.

AU - Khairuzzaman, Md

AU - Folland, T.

AU - Gholinia, A.

AU - Beere, H. E.

AU - Ritchie, D. A.

A2 - Chakraborty, Subhasish

PY - 2013/5/28

Y1 - 2013/5/28

N2 - Focussed ion beam milling can be used to introduce aperiodic distributed feedback (ADFB) gratings into fully packaged, operational terahertz (THZ) quantum cascade lasers to achieve electronically controlled, discretely tunable laser emission. These aperiodic gratings - designed using computer-generated hologram techniques - consist of multiple slits in the surface plasmon waveguide, distributed along the length of the laser cavity. Tuning behaviour and output power in ADFB lasers operating around 2.9 THz are investigated with a variety of slit dimensions and grating scales. Mode selectivity and grating losses are found to be strongly dependent on milling depth into the upper waveguide layers, dramatically increasing as the metallic layers are penetrated, then rising more slowly with deeper milling into the laser active region. Grating scale and placement along the laser cavity length are also shown to influence mode selection. © 2013 AIP Publishing LLC.

AB - Focussed ion beam milling can be used to introduce aperiodic distributed feedback (ADFB) gratings into fully packaged, operational terahertz (THZ) quantum cascade lasers to achieve electronically controlled, discretely tunable laser emission. These aperiodic gratings - designed using computer-generated hologram techniques - consist of multiple slits in the surface plasmon waveguide, distributed along the length of the laser cavity. Tuning behaviour and output power in ADFB lasers operating around 2.9 THz are investigated with a variety of slit dimensions and grating scales. Mode selectivity and grating losses are found to be strongly dependent on milling depth into the upper waveguide layers, dramatically increasing as the metallic layers are penetrated, then rising more slowly with deeper milling into the laser active region. Grating scale and placement along the laser cavity length are also shown to influence mode selection. © 2013 AIP Publishing LLC.

U2 - 10.1063/1.4807636

DO - 10.1063/1.4807636

M3 - Article

SN - 1089-7550

VL - 113

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 20

M1 - 203103

ER -

Electronically tunable aperiodic distributed feedback terahertz lasers

Abstract

Access to Document

Fingerprint

Cite this