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Research Output 1993 2019

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2019

High performance dual-mode operation asymmetric superlattice infrared photodetector using leaky electronic states

Pereira, P. H., Penello, G. M., Pires, M. P., Sivco, D., Gmachl, C. F. & Souza, P. L., May 28 2019, In : Journal of Applied Physics. 125, 20, 204501.

Research output: Contribution to journalArticle

photometers
continuums
room temperature
dark current
operating temperature
2018
4 Citations (Scopus)

High-power spiral cavity quantum cascade superluminescent emitters with a passive loop back facet

Zheng, M. C., Zhang, Y. M., Liu, P. Q., Wang, X., Fan, J. Y., Troccoli, M. & Gmachl, C. F., Jan 1 2018, In : Optical Engineering. 57, 1, 011001.

Research output: Contribution to journalArticle

Threshold current density
flat surfaces
cascades
emitters
Demonstrations
5 Citations (Scopus)

Implementation of an integrating sphere for the enhancement of noninvasive glucose detection using quantum cascade laser spectroscopy

Werth, A., Liakat, S., Dong, A., Woods, C. M. & Gmachl, C. F., May 1 2018, In : Applied Physics B: Lasers and Optics. 124, 5, 75.

Research output: Contribution to journalArticle

quantum cascade lasers
laser spectroscopy
glucose
augmentation
sensors
2 Citations (Scopus)

Leaky electronic states for photovoltaic photodetectors based on asymmetric superlattices

Penello, G. M., Pereira, P. H., Pires, M. P., Sivco, D., Gmachl, C. F. & Souza, P. L., Jan 15 2018, In : Applied Physics Letters. 112, 3, 033503.

Research output: Contribution to journalArticle

photometers
superlattices
electronics
continuums
room temperature

Two-band ZnCdSe/ZnCdMgSe quantum well infrared photodetector

Kaya, Y., Ravikumar, A., Chen, G., Tamargo, M. C., Shen, A. & Gmachl, C. F., Jul 1 2018, In : AIP Advances. 8, 7, 075105.

Research output: Contribution to journalArticle

quantum well infrared photodetectors
detectors
quantum wells
wavelengths
photocurrents

Visualizing period fluctuations in strained-layer superlattices with scanning tunneling microscopy

Kanedy, K., Lopez, F., Wood, M. R., Gmachl, C. F., Weimer, M., Klem, J. F., Hawkins, S. D., Shaner, E. A. & Kim, J. K., Jan 22 2018, In : Applied Physics Letters. 112, 4, 042105.

Research output: Contribution to journalArticle

superlattices
scanning tunneling microscopy
support systems
x ray diffraction
roughness
2016
1 Citation (Scopus)

Growth and characterization of ZnCdSe/ZnCdMgSe two-color quantum well infrared photodetectors

Chen, G., Kaya, Y., Ravikumar, A. P., Tamargo, M. C., Gmachl, C. F. & Shen, A., Jul 1 2016, In : Physica Status Solidi (C) Current Topics in Solid State Physics. 13, 7-9, p. 673-676 4 p.

Research output: Contribution to journalArticle

quantum well infrared photodetectors
color
photometers
molecular beam epitaxy
photoluminescence
5 Citations (Scopus)

II–VI quantum cascade emitters in the 6–8 μm range

Garcia, T. A., De Jesus, J., Ravikumar, A. P., Gmachl, C. F. & Tamargo, M. C., Aug 1 2016, In : Physica Status Solidi (B) Basic Research. 253, 8, p. 1494-1497 4 p.

Research output: Contribution to journalArticle

cascades
emitters
Energy gap
Electroluminescence
mesas
4 Citations (Scopus)

Three-dimensional interface roughness in layered semiconductor structures and its effect on intersubband transitions

Song, A. Y., Bhat, R., Bouzi, P., Zah, C. E. & Gmachl, C. F., Oct 18 2016, In : Physical Review B. 94, 16, 165307.

Research output: Contribution to journalArticle

roughness
Surface roughness
Scattering
scattering
Superlattices
2 Citations (Scopus)

Wavelength independent normal incident quantum cascade detectors

Ravikumar, A. P., Sivco, D. & Gmachl, C. F., Oct 31 2016, In : Optics Express. 24, 22, p. 25269-25276 8 p.

Research output: Contribution to journalArticle

mesas
cascades
incidence
detectors
wavelengths
2015
22 Citations (Scopus)

High performance, room temperature, broadband II-VI quantum cascade detector

Ravikumar, A. P., De Jesus, J., Tamargo, M. C. & Gmachl, C. F., Oct 5 2015, In : Applied Physics Letters. 107, 14, 141105.

Research output: Contribution to journalArticle

photocurrents
cascades
broadband
detectors
room temperature
6 Citations (Scopus)

High power spiral cavity quantum cascade superluminescent emitter

Zheng, M. C., Aung, N. L., Basak, A., Liu, P. Q., Wang, X., Fan, J. Y., Troccoli, M. & Gmachl, C. F., Jan 1 2015, In : Optics Express. 23, 3, p. 2713-2719 7 p.

Research output: Contribution to journalArticle

cascades
emitters
emission spectra
cavities
wavelengths
10 Citations (Scopus)

Quantum cascade emission in the III-nitride material system designed with effective interface grading

Song, A. Y., Bhat, R., Allerman, A. A., Wang, J., Huang, T. Y., Zah, C. E. & Gmachl, C. F., Sep 28 2015, In : Applied Physics Letters. 107, 13, 132104.

Research output: Contribution to journalArticle

nitrides
cascades
spontaneous emission
light emission
eigenvectors
6 Citations (Scopus)

Threshold current reduction and directional emission of deformed microdisk lasers via spatially selective electrical pumping

Aung, N. L., Ge, L., Malik, O., Tureci, H. E. & Gmachl, C. F., Oct 12 2015, In : Applied Physics Letters. 107, 15, 151106.

Research output: Contribution to journalArticle

threshold currents
pumping
lasers
triangles
continuous radiation
2014
17 Citations (Scopus)

High detectivity short-wavelength II-VI quantum cascade detector

Ravikumar, A. P., Garcia, T. A., Jesus, J. D., Tamargo, M. C. & Gmachl, C. F., Aug 11 2014, In : Applied Physics Letters. 105, 6, 061113.

Research output: Contribution to journalArticle

cascades
background radiation
detectors
wavelengths
spectral bands
9 Citations (Scopus)

High peak power (≥10 mW) quantum cascade superluminescent emitter

Aung, N. L., Yu, Z., Yu, Y., Liu, P. Q., Wang, X., Fan, J. Y., Troccoli, M. & Gmachl, C. F., Dec 1 2014, In : Applied Physics Letters. 105, 22, 221111.

Research output: Contribution to journalArticle

flat surfaces
cascades
emitters
quantum cascade lasers
mirrors
4 Citations (Scopus)

III-nitride quantum cascade detector grown by metal organic chemical vapor deposition

Song, Y., Bhat, R., Huang, T. Y., Badami, P., Zah, C. E. & Gmachl, C. F., Nov 3 2014, In : Applied Physics Letters. 105, 18, 182104.

Research output: Contribution to journalArticle

nitrides
metalorganic chemical vapor deposition
cascades
detectors
temperature
4 Citations (Scopus)

Importance of growth direction in mid-infrared quantum cascade lasers

Bouzi, P. M., Chiu, Y., Deutsch, C., Dikmelik, Y., Song, Y., Tokranov, V., Oktyabrsky, S. & Gmachl, C. F., Jul 21 2014, In : Journal of Applied Physics. 116, 3, 034504.

Research output: Contribution to journalArticle

quantum cascade lasers
infrared lasers
roughness
life (durability)
electroluminescence
6 Citations (Scopus)

Low-strain, quantum-cascade-laser active regions grown on metamorphic buffer layers for emission in the 3.0-4.0 μm wavelength region

Mawst, L. J., Kirch, J. D., Kim, T. W., Garrod, T., Boyle, C., Botez, D., Zutter, B., Schulte, K., Kuech, T. F., Bouzi, P. M., Gmachl, C. F. & Earles, T., Jan 1 2014, In : IET Optoelectronics. 8, 2, p. 25-32 8 p.

Research output: Contribution to journalArticle

Quantum cascade lasers
quantum cascade lasers
Buffer layers
buffers
Wavelength
5 Citations (Scopus)

Mid-infrared light emission from a Fe2+:ZnSe polycrystal using quantum cascade laser pumping

Song, Y., Sonntag, J., Mirov, S. B., Gmachl, C. F. & Khurgin, J. B., Oct 6 2014, In : Applied Physics Letters. 105, 14, 141108.

Research output: Contribution to journalArticle

laser pumping
quantum cascade lasers
polycrystals
light emission
life (durability)
59 Citations (Scopus)

Noninvasive in vivo glucose sensing on human subjects using mid-infrared light

Liakat, S., Bors, K. A., Xu, L., Woods, C. M., Doyle, J. & Gmachl, C. F., Jun 1 2014, In : Biomedical Optics Express. 5, 7, p. 2397-2404 8 p.

Research output: Contribution to journalArticle

Semiconductor Lasers
glucose
quantum cascade lasers
Optical Fibers
Light

Non-uniform lateral current distribution in quantum cascade lasers

Huang, X., Dikmelik, Y. & Gmachl, C. F., Mar 10 2014, In : Optics Express. 22, 5, p. 6154-6164 11 p.

Research output: Contribution to journalArticle

quantum cascade lasers
current distribution
photon density
hole burning
electrons
2013
3 Citations (Scopus)

Characterization of the three-well active region of a quantum cascade laser using contactless electroreflectance

De Jesus, J., Garcia, T. A., Dhomkar, S., Ravikumar, A., Gmachl, C. F., Chen, G., Shen, A., Ferizovic, D., Muñoz, M. & Tamargo, M. C., Jan 1 2013, In : Journal of Vacuum Science and Technology B:Nanotechnology and Microelectronics. 31, 3, 03C134.

Research output: Contribution to journalArticle

Quantum cascade lasers
quantum cascade lasers
Infrared absorption
Conduction bands
infrared absorption
4 Citations (Scopus)

Improved electrical properties and crystalline quality of II-VI heterostructures for quantum cascade lasers

Axtmann Garcia, T., Hong, S., Tamargo, M., De Jesus, J., Deligiannakis, V., Ravikumar, A., Gmachl, C. F. & Shen, A., Jan 1 2013, In : Journal of Vacuum Science and Technology B:Nanotechnology and Microelectronics. 31, 3, 03C133.

Research output: Contribution to journalArticle

Quantum cascade lasers
Lattice mismatch
quantum cascade lasers
Heterojunctions
Electric properties
32 Citations (Scopus)

In vitro measurements of physiological glucose concentrations in biological fluids using mid-infrared light

Liakat, S., Bors, K. A., Huang, T. Y., Michel, A. P. M., Zanghi, E. & Gmachl, C. F., Jan 1 2013, In : Biomedical Optics Express. 4, 7, p. 1083-1090 8 p.

Research output: Contribution to journalArticle

glucose
Light
Glucose
fluids
Semiconductor Lasers
29 Citations (Scopus)

In vivo measurement of mid-infrared light scattering from human skin

Michel, A. P. M., Liakat, S., Bors, K. & Gmachl, C. F., Apr 1 2013, In : Biomedical Optics Express. 4, 4, p. 520-530 11 p.

Research output: Contribution to journalArticle

light scattering
Light
Semiconductor Lasers
Skin
infrared spectrometers
8 Citations (Scopus)

MBE growth of ZnCdSe/ZnCdMgSe quantum-well infrared photodetectors

Shen, A., Pawan Ravikumar, A., Chen, G., Zhao, K., Alfaro-Martinez, A., Garcia, T., De Jesus, J., Tamargo, M. C. & Gmachl, C. F., Jan 1 2013, In : Journal of Vacuum Science and Technology B:Nanotechnology and Microelectronics. 31, 3, 03C113.

Research output: Contribution to journalArticle

Quantum well infrared photodetectors
quantum well infrared photodetectors
Molecular beam epitaxy
Infrared radiation
spectral sensitivity
1 Citation (Scopus)

Quantum cascade laser-based sensing for carbon sequestration leakage monitoring

Escarra, M. D., Le, L. T., Urban, N. M., Oppenheimer, M. & Gmachl, C. F., May 13 2013, In : IEEE Sensors Journal. 13, 6, p. 2348-2356 9 p., 6482580.

Research output: Contribution to journalArticle

Quantum cascade lasers
Carbon capture
quantum cascade lasers
leakage
half life
24 Citations (Scopus)

Room temperature and high responsivity short wavelength II-VI quantum well infrared photodetector

Ravikumar, A. P., Chen, G., Zhao, K., Tian, Y., Prucnal, P. R., Tamargo, M. C., Gmachl, C. F. & Shen, A., Apr 22 2013, In : Applied Physics Letters. 102, 16, 161107.

Research output: Contribution to journalArticle

quantum well infrared photodetectors
room temperature
wavelengths
carrier lifetime
dark current
1 Citation (Scopus)

Same-wavelength cascaded-transition quantum cascade laser

Huang, X., Zhang, J. L., Tokranov, V., Oktyabrsky, S. & Gmachl, C. F., Jul 29 2013, In : Applied Physics Letters. 103, 5, 051113.

Research output: Contribution to journalArticle

quantum cascade lasers
cascades
wavelengths
saturation
optical transition
3 Citations (Scopus)

Suppression of pointing instability in quantum cascade lasers by transverse mode control

Bouzi, P. M., Liu, P. Q., Aung, N., Wang, X., Fan, J. Y., Troccoli, M. & Gmachl, C. F., Mar 25 2013, In : Applied Physics Letters. 102, 12, 122105.

Research output: Contribution to journalArticle

quantum cascade lasers
retarding
numerical aperture
laser cavities
far fields
1 Citation (Scopus)

Wavelength selection and spectral narrowing of distributed Bragg reflector quantum cascade lasers up to peak optical power

Sadeghi, A., Liu, P. Q., Wang, X., Fan, J., Troccoli, M. & Gmachl, C. F., Dec 16 2013, In : Optics Express. 21, 25, p. 31012-31018 7 p.

Research output: Contribution to journalArticle

DBR lasers
quantum cascade lasers
ridges
gratings
Bragg reflectors
4 Citations (Scopus)

Wide single-mode tuning in quantum cascade lasers with asymmetric Mach-Zehnder interferometer type cavities with separately biased arms

Zheng, M. C., Liu, P. Q., Wang, X., Fan, J. Y., Troccoli, M. & Gmachl, C. F., Nov 18 2013, In : Applied Physics Letters. 103, 21, 211112.

Research output: Contribution to journalArticle

quantum cascade lasers
Mach-Zehnder interferometers
tuning
cavities
continuous radiation
2012
19 Citations (Scopus)

Bridging the collaborative gap: Realizing the clinical potential of breath analysis for disease diagnosis and monitoring-tutorial

Braun, P. X., Gmachl, C. F. & Dweik, R. A., Oct 26 2012, In : IEEE Sensors Journal. 12, 11, p. 3258-3270 13 p., 6249719.

Research output: Contribution to journalArticle

Monitoring
Biomarkers
Public health
Cost effectiveness
multidisciplinary research
1 Citation (Scopus)

Effect of surface defects on InGaAs/InAlAs Quantum Cascade mesa current-voltage characteristics

Aung, N. L., Huang, X., Charles, W. O., Yao, N. & Gmachl, C. F., Aug 15 2012, In : Journal of Crystal Growth. 353, 1, p. 35-38 4 p.

Research output: Contribution to journalArticle

Surface defects
mesas
surface defects
Current voltage characteristics
cascades
13 Citations (Scopus)

Femtosecond carrier dynamics and nonlinear effects in quantum cascade lasers

Liu, S., Lalanne, E., Liu, P. Q., Wang, X., Gmachl, C. F. & Johnson, A. M., Jan 1 2012, In : IEEE Journal on Selected Topics in Quantum Electronics. 18, 1, p. 92-104 13 p., 6145139.

Research output: Contribution to journalArticle

Quantum cascade lasers
quantum cascade lasers
injectors
Resonant tunneling
resonant tunneling
11 Citations (Scopus)

Grating duty-cycle induced enhancement of substrate emission from ring cavity quantum cascade lasers

Schwarzer, C., Mujagić, E., Ahn, S. I., Andrews, A. M., Schrenk, W., Charles, W., Gmachl, C. F. & Strasser, G., May 7 2012, In : Applied Physics Letters. 100, 19, 191103.

Research output: Contribution to journalArticle

quantum cascade lasers
gratings
cavities
cycles
augmentation
2 Citations (Scopus)

Implementation of a semi-transparent mid-infrared quantum well infrared photodetector simultaneously as a beamsplitter and a reference detector

Bentil, E. N., Penello, G. M., Charles, W. O., Liu, P. Q. & Gmachl, C. F., Jan 2 2012, In : Applied Physics Letters. 100, 1, 011104.

Research output: Contribution to journalArticle

quantum well infrared photodetectors
photometers
detectors
incidence
polarized light
34 Citations (Scopus)

Importance of interface roughness induced intersubband scattering in mid-infrared quantum cascade lasers

Chiu, Y., Dikmelik, Y., Liu, P. Q., Aung, N. L., Khurgin, J. B. & Gmachl, C. F., Oct 22 2012, In : Applied Physics Letters. 101, 17, 171117.

Research output: Contribution to journalArticle

quantum cascade lasers
infrared lasers
roughness
scattering
life (durability)
13 Citations (Scopus)

Mid-infrared (λ = 8.4-9.9 μm) light scattering from porcine tissue

Liakat, S., Michel, A. P. M., Bors, K. A. & Gmachl, C. F., Aug 27 2012, In : Applied Physics Letters. 101, 9, 093705.

Research output: Contribution to journalArticle

light scattering
scattering
quantum cascade lasers
collagens
glucose
2 Citations (Scopus)

Optimization of molecular beam epitaxy (MBE) growth for the development of mid-infrared (IR) II-VI quantum cascade lasers

Moug, R. T., Sultana, H., Yao, Y., Alfaro-Martinez, A., Peng, L., Garcia, T., Shen, A., Gmachl, C. F. & Tamargo, M. C., May 1 2012, In : Journal of Electronic Materials. 41, 5, p. 944-947 4 p.

Research output: Contribution to journalArticle

Quantum cascade lasers
quantum cascade lasers
Molecular beam epitaxy
molecular beam epitaxy
Electroluminescence

QCL-based sensors target health and environmental applications

Hu, J. & Gmachl, C. F., Feb 1 2012, Laser Focus World, 48, 2, p. 39-43 5 p.

Research output: Contribution to specialist publicationArticle

Photoacoustic spectroscopy
photoacoustic spectroscopy
health
Quartz
quartz
17 Citations (Scopus)

Ridge-width dependence of the threshold of long wavelength (λ ≈14 μm) quantum cascade lasers with sloped and vertical sidewalls

Huang, X., Chiu, Y., Charles, W. O. & Gmachl, C. F., Jan 30 2012, In : Optics Express. 20, 3, p. 2539-2547 9 p.

Research output: Contribution to journalArticle

quantum cascade lasers
ridges
etching
thresholds
wavelengths
15 Citations (Scopus)

Single-mode quantum cascade lasers employing asymmetric Mach-Zehnder interferometer type cavities

Liu, P. Q., Wang, X. & Gmachl, C. F., Oct 15 2012, In : Applied Physics Letters. 101, 16, 161115.

Research output: Contribution to journalArticle

quantum cascade lasers
Mach-Zehnder interferometers
cavities
laser cavities
continuous radiation
20 Citations (Scopus)

ZnCdSe/ZnCdMgSe quantum well infrared photodetector

Ravikumar, A. P., Alfaro-Martinez, A., Chen, G., Zhao, K., Tamargo, M. C., Gmachl, C. F. & Shen, A., Sep 24 2012, In : Optics Express. 20, 20, p. 22391-22397 7 p.

Research output: Contribution to journalArticle

quantum well infrared photodetectors
photocurrents
operating temperature
fabrication
temperature
2011
9 Citations (Scopus)

Cavity length scaling of quantum cascade lasers for single-mode emission and low heat dissipation, room temperature, continuous wave operation

Cendejas, R. A., Liu, Z., Sánchez-Vaynshteyn, W., Caneau, C. G., Zah, C. E. & Gmachl, C. F., Feb 3 2011, In : IEEE Photonics Journal. 3, 1, 5680570.

Research output: Contribution to journalArticle

Quantum cascade lasers
quantum cascade lasers
Heat losses
continuous radiation
Tuning
6 Citations (Scopus)

Enhanced bandwidth and reduced dispersion through stacking multiple optical metamaterials

Escarra, M. D., Thongrattanasiri, S., Charles, W. O., Hoffman, A. J., Podolskiy, V. A. & Gmachl, C. F., Aug 1 2011, In : Optics Express. 19, 16, p. 14990-14998 9 p.

Research output: Contribution to journalArticle

bandwidth
refraction

Quantum cascade lasers enhance Mid-IR spectroscopy

Hu, J. & Gmachl, C. F., Dec 1 2011, Photonics Spectra, 45, 12.

Research output: Contribution to specialist publicationArticle

Quantum cascade lasers
quantum cascade lasers
Infrared spectroscopy
tuning
Lasers
7 Citations (Scopus)

Ring-cavity surface-emitting lasers as a building block for tunable and coherent quantum cascade laser arrays

Mujagić, E., Schwarzer, C., Schrenk, W., Chen, J., Gmachl, C. F. & Strasser, G., Jan 1 2011, In : Semiconductor Science and Technology. 26, 1, 014019.

Research output: Contribution to journalArticle

Quantum cascade lasers
laser arrays
Surface emitting lasers
quantum cascade lasers
surface emitting lasers
23 Citations (Scopus)

Room temperature and narrow intersubband electroluminescence from ZnCdSe/ZnCdMgSe quantum cascade laser structures

Yao, Y., Alfaro-Martinez, A., Franz, K. J., Charles, W. O., Shen, A., Tamargo, M. C. & Gmachl, C. F., Jul 25 2011, In : Applied Physics Letters. 99, 4, 041113.

Research output: Contribution to journalArticle

quantum cascade lasers
electroluminescence
room temperature
cascades
luminescence