Longitudinal computer-generated holograms for digital frequency control in electronically tunable terahertz lasers

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

doi:10.1063/1.4753814

Longitudinal computer-generated holograms for digital frequency control in electronically tunable terahertz lasers

Subhasish Chakraborty^* (Lead), Owen P. Marshall, Md Khairuzzaman, Chen Wei Hsin, Harvey E. Beere, David A. Ritchie

^*Corresponding author for this work

EEE - Academic & Research

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

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Abstract

Longitudinal computer-generated holograms (LCGHs) can be used for the inverse design of aperiodic photonic lattices for customizable frequency control of light propagation. A one-dimensional binary LCGH, designed to harness the coarse gain tuning of a terahertz (THz) quantum cascade laser (QCL) operating at around 2.9 THz, is patterned directly by ion milling into the surface plasmon-based waveguides of pre-characterized QCLs. The initial multi-mode emission is suppressed in favour of electronically controlled, discretely tunable single-mode lasing spanning over 160 GHz. Side-mode suppression ratios of over 20 dB are also demonstrated in these tunable THz LCGH-QCLs. © 2012 American Institute of Physics.

Original language	English
Article number	121103
Journal	Applied Physics Letters
Volume	101
Issue number	12
DOIs	https://doi.org/10.1063/1.4753814
Publication status	Published - 17 Sept 2012

Keywords

Tunable THz QCL
aperiodic lattice
DFB
hologram
PBG

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title = "Longitudinal computer-generated holograms for digital frequency control in electronically tunable terahertz lasers",

abstract = "Longitudinal computer-generated holograms (LCGHs) can be used for the inverse design of aperiodic photonic lattices for customizable frequency control of light propagation. A one-dimensional binary LCGH, designed to harness the coarse gain tuning of a terahertz (THz) quantum cascade laser (QCL) operating at around 2.9 THz, is patterned directly by ion milling into the surface plasmon-based waveguides of pre-characterized QCLs. The initial multi-mode emission is suppressed in favour of electronically controlled, discretely tunable single-mode lasing spanning over 160 GHz. Side-mode suppression ratios of over 20 dB are also demonstrated in these tunable THz LCGH-QCLs. {\textcopyright} 2012 American Institute of Physics.",

keywords = "Tunable THz QCL, aperiodic lattice, DFB, hologram, PBG",

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

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T1 - Longitudinal computer-generated holograms for digital frequency control in electronically tunable terahertz lasers

AU - Marshall, Owen P.

AU - Khairuzzaman, Md

AU - Hsin, Chen Wei

AU - Beere, Harvey E.

AU - Ritchie, David A.

A2 - Chakraborty, Subhasish

PY - 2012/9/17

Y1 - 2012/9/17

N2 - Longitudinal computer-generated holograms (LCGHs) can be used for the inverse design of aperiodic photonic lattices for customizable frequency control of light propagation. A one-dimensional binary LCGH, designed to harness the coarse gain tuning of a terahertz (THz) quantum cascade laser (QCL) operating at around 2.9 THz, is patterned directly by ion milling into the surface plasmon-based waveguides of pre-characterized QCLs. The initial multi-mode emission is suppressed in favour of electronically controlled, discretely tunable single-mode lasing spanning over 160 GHz. Side-mode suppression ratios of over 20 dB are also demonstrated in these tunable THz LCGH-QCLs. © 2012 American Institute of Physics.

AB - Longitudinal computer-generated holograms (LCGHs) can be used for the inverse design of aperiodic photonic lattices for customizable frequency control of light propagation. A one-dimensional binary LCGH, designed to harness the coarse gain tuning of a terahertz (THz) quantum cascade laser (QCL) operating at around 2.9 THz, is patterned directly by ion milling into the surface plasmon-based waveguides of pre-characterized QCLs. The initial multi-mode emission is suppressed in favour of electronically controlled, discretely tunable single-mode lasing spanning over 160 GHz. Side-mode suppression ratios of over 20 dB are also demonstrated in these tunable THz LCGH-QCLs. © 2012 American Institute of Physics.

KW - Tunable THz QCL

KW - aperiodic lattice

KW - DFB

KW - hologram

KW - PBG

U2 - 10.1063/1.4753814

DO - 10.1063/1.4753814

M3 - Article

SN - 0003-6951

VL - 101

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 12

M1 - 121103

ER -

Longitudinal computer-generated holograms for digital frequency control in electronically tunable terahertz lasers

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Keywords

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