Dielectric deposition for tuning the frequency of THz quantum cascade lasers

B. Mirzaei; D. J. Hayton; D. Thoen; J. R. Gao; T. Y. Kao; Q. Hu; J. L. Reno

Dielectric deposition for tuning the frequency of THz quantum cascade lasers

B. Mirzaei^*, D. J. Hayton, D. Thoen, J. R. Gao, T. Y. Kao, Q. Hu, J. L. Reno

^*Corresponding author for this work

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

Abstract

We report an extensive study of the effect of an additional dielectric layer on the frequency of terahertz quantum cascade lasers (QCLs). QCLs with third-order distributed feedback structure at frequencies of 3.5 and 4.7 THz are used in our experiment. The dielectric layer applied is either Silicon-dioxide (SiO₂) or Polymethylmethacrylaat (PMMA). We find that both dielectric layers can down shift the lasing frequency up to 6GHz on a 3.5THz QCL, and 13GHz for a 4.7THz QCL. Full 3D FEM simulations suggest that the effect is dominated by the effective thickness of the dielectric on the vertical walls of the laser structure, and also confirm that for a given dielectric layer the effect is stronger in the 4.7THz QCL due to its larger out-distribution of electric-magnetic field. The knowledge provides guideline to shift the frequency of an existing QCL used as a local oscillator in practical applications.

Original language	English
Title of host publication	ISSTT 2017 - 28th International Symposium on Space Terahertz Technology
Editors	Imran Mehdi
Publisher	ISSTT2017
Number of pages	14
Volume	2017-March
ISBN (Electronic)	978-1-5108-5972-2
Publication status	Published - 2017
Event	28th International Symposium on Space Terahertz Technology, ISSTT 2017 - Cologne, Germany Duration: 13 Mar 2017 → 15 Mar 2017

Conference

Conference	28th International Symposium on Space Terahertz Technology, ISSTT 2017
Country/Territory	Germany
City	Cologne
Period	13/03/17 → 15/03/17

Cite this

@inproceedings{ca7af188d86f4bceaf859de7113c2770,

title = "Dielectric deposition for tuning the frequency of THz quantum cascade lasers",

abstract = "We report an extensive study of the effect of an additional dielectric layer on the frequency of terahertz quantum cascade lasers (QCLs). QCLs with third-order distributed feedback structure at frequencies of 3.5 and 4.7 THz are used in our experiment. The dielectric layer applied is either Silicon-dioxide (SiO2) or Polymethylmethacrylaat (PMMA). We find that both dielectric layers can down shift the lasing frequency up to 6GHz on a 3.5THz QCL, and 13GHz for a 4.7THz QCL. Full 3D FEM simulations suggest that the effect is dominated by the effective thickness of the dielectric on the vertical walls of the laser structure, and also confirm that for a given dielectric layer the effect is stronger in the 4.7THz QCL due to its larger out-distribution of electric-magnetic field. The knowledge provides guideline to shift the frequency of an existing QCL used as a local oscillator in practical applications.",

author = "B. Mirzaei and Hayton, {D. J.} and D. Thoen and Gao, {J. R.} and Kao, {T. Y.} and Q. Hu and Reno, {J. L.}",

year = "2017",

language = "English",

volume = "2017-March",

editor = "Imran Mehdi",

booktitle = "ISSTT 2017 - 28th International Symposium on Space Terahertz Technology",

publisher = "ISSTT2017",

note = "28th International Symposium on Space Terahertz Technology, ISSTT 2017 ; Conference date: 13-03-2017 Through 15-03-2017",

}

Mirzaei, B, Hayton, DJ, Thoen, D , Gao, JR, Kao, TY, Hu, Q & Reno, JL 2017, Dielectric deposition for tuning the frequency of THz quantum cascade lasers. in I Mehdi (ed.), ISSTT 2017 - 28th International Symposium on Space Terahertz Technology. vol. 2017-March, ISSTT2017, 28th International Symposium on Space Terahertz Technology, ISSTT 2017, Cologne, Germany, 13/03/17.

Dielectric deposition for tuning the frequency of THz quantum cascade lasers. / Mirzaei, B.; Hayton, D. J.; Thoen, D. et al.
ISSTT 2017 - 28th International Symposium on Space Terahertz Technology. ed. / Imran Mehdi. Vol. 2017-March ISSTT2017, 2017.

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

TY - GEN

T1 - Dielectric deposition for tuning the frequency of THz quantum cascade lasers

AU - Mirzaei, B.

AU - Hayton, D. J.

AU - Thoen, D.

AU - Gao, J. R.

AU - Kao, T. Y.

AU - Hu, Q.

AU - Reno, J. L.

PY - 2017

Y1 - 2017

N2 - We report an extensive study of the effect of an additional dielectric layer on the frequency of terahertz quantum cascade lasers (QCLs). QCLs with third-order distributed feedback structure at frequencies of 3.5 and 4.7 THz are used in our experiment. The dielectric layer applied is either Silicon-dioxide (SiO2) or Polymethylmethacrylaat (PMMA). We find that both dielectric layers can down shift the lasing frequency up to 6GHz on a 3.5THz QCL, and 13GHz for a 4.7THz QCL. Full 3D FEM simulations suggest that the effect is dominated by the effective thickness of the dielectric on the vertical walls of the laser structure, and also confirm that for a given dielectric layer the effect is stronger in the 4.7THz QCL due to its larger out-distribution of electric-magnetic field. The knowledge provides guideline to shift the frequency of an existing QCL used as a local oscillator in practical applications.

AB - We report an extensive study of the effect of an additional dielectric layer on the frequency of terahertz quantum cascade lasers (QCLs). QCLs with third-order distributed feedback structure at frequencies of 3.5 and 4.7 THz are used in our experiment. The dielectric layer applied is either Silicon-dioxide (SiO2) or Polymethylmethacrylaat (PMMA). We find that both dielectric layers can down shift the lasing frequency up to 6GHz on a 3.5THz QCL, and 13GHz for a 4.7THz QCL. Full 3D FEM simulations suggest that the effect is dominated by the effective thickness of the dielectric on the vertical walls of the laser structure, and also confirm that for a given dielectric layer the effect is stronger in the 4.7THz QCL due to its larger out-distribution of electric-magnetic field. The knowledge provides guideline to shift the frequency of an existing QCL used as a local oscillator in practical applications.

UR - http://www.scopus.com/inward/record.url?scp=85048983438&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:85048983438

VL - 2017-March

BT - ISSTT 2017 - 28th International Symposium on Space Terahertz Technology

A2 - Mehdi, Imran

PB - ISSTT2017

T2 - 28th International Symposium on Space Terahertz Technology, ISSTT 2017

Y2 - 13 March 2017 through 15 March 2017

ER -

Dielectric deposition for tuning the frequency of THz quantum cascade lasers

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