Reversible mode switching in Y-coupled terahertz lasers

Owen P. Marshall; Subhasish Chakraborty; Md Khairuzzaman; Harvey E. Beere; David A. Ritchie

doi:10.1063/1.4796039

Reversible mode switching in Y-coupled terahertz lasers

Owen P. Marshall, Subhasish Chakraborty, Md Khairuzzaman, Harvey E. Beere, David A. Ritchie

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Abstract

Electrically independent terahertz (THz) quantum cascade lasers (QCLs) are optically coupled in a Y configuration. Dual frequency, electronically switchable emission is achieved in one QCL using an aperiodic grating, designed using computer-generated hologram techniques, and incorporated directly into the QCL waveguide by focussed ion beam milling. Multi-moded emission around 2.9 THz is inhibited, lasing instead occurring at switchable grating-selected frequencies of 2.88 and 2.92 THz. This photonic control and switching behaviour is selectively and reversibly transferred to the second, unmodified QCL via evanescent mode coupling, without the transfer of the inherent grating losses. © 2013 American Institute of Physics.

Original language	English
Article number	111105
Journal	Applied Physics Letters
Volume	102
Issue number	11
DOIs	https://doi.org/10.1063/1.4796039
Publication status	Published - 18 Mar 2013

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title = "Reversible mode switching in Y-coupled terahertz lasers",

abstract = "Electrically independent terahertz (THz) quantum cascade lasers (QCLs) are optically coupled in a Y configuration. Dual frequency, electronically switchable emission is achieved in one QCL using an aperiodic grating, designed using computer-generated hologram techniques, and incorporated directly into the QCL waveguide by focussed ion beam milling. Multi-moded emission around 2.9 THz is inhibited, lasing instead occurring at switchable grating-selected frequencies of 2.88 and 2.92 THz. This photonic control and switching behaviour is selectively and reversibly transferred to the second, unmodified QCL via evanescent mode coupling, without the transfer of the inherent grating losses. {\textcopyright} 2013 American Institute of Physics.",

author = "Marshall, {Owen P.} and Subhasish Chakraborty and Md Khairuzzaman and Beere, {Harvey E.} and Ritchie, {David A.}",

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T1 - Reversible mode switching in Y-coupled terahertz lasers

AU - Marshall, Owen P.

AU - Chakraborty, Subhasish

AU - Khairuzzaman, Md

AU - Beere, Harvey E.

AU - Ritchie, David A.

PY - 2013/3/18

Y1 - 2013/3/18

N2 - Electrically independent terahertz (THz) quantum cascade lasers (QCLs) are optically coupled in a Y configuration. Dual frequency, electronically switchable emission is achieved in one QCL using an aperiodic grating, designed using computer-generated hologram techniques, and incorporated directly into the QCL waveguide by focussed ion beam milling. Multi-moded emission around 2.9 THz is inhibited, lasing instead occurring at switchable grating-selected frequencies of 2.88 and 2.92 THz. This photonic control and switching behaviour is selectively and reversibly transferred to the second, unmodified QCL via evanescent mode coupling, without the transfer of the inherent grating losses. © 2013 American Institute of Physics.

AB - Electrically independent terahertz (THz) quantum cascade lasers (QCLs) are optically coupled in a Y configuration. Dual frequency, electronically switchable emission is achieved in one QCL using an aperiodic grating, designed using computer-generated hologram techniques, and incorporated directly into the QCL waveguide by focussed ion beam milling. Multi-moded emission around 2.9 THz is inhibited, lasing instead occurring at switchable grating-selected frequencies of 2.88 and 2.92 THz. This photonic control and switching behaviour is selectively and reversibly transferred to the second, unmodified QCL via evanescent mode coupling, without the transfer of the inherent grating losses. © 2013 American Institute of Physics.

U2 - 10.1063/1.4796039

DO - 10.1063/1.4796039

M3 - Article

VL - 102

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 11

M1 - 111105

ER -

Reversible mode switching in Y-coupled terahertz lasers

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