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  • John Kouvetakis
2017

Single-defect hexapole mode GeSn photonic crystal laser: Fabrication and simulation

Bao, S., Qiu, H., Kim, Y., Lin, Y., Ryu, H. Y., Ryu, M. Y., Yeo, Y. K., Kouvetakis, J., Fitzgerald, E., Wang, H., Nam, D. & Tan, C. S., Oct 25 2017, 2017 Conference on Lasers and Electro-Optics, CLEO 2017 - Proceedings. Institute of Electrical and Electronics Engineers Inc., Vol. 2017-January. p. 1-2 2 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2016

Toward GeSn lasers: Light amplification and stimulated emission in GeSn waveguides at room temperature

Mathews, J., Li, Z., Zhao, Y., Gallagher, J. D., Agha, I., Menendez, J. & Kouvetakis, J., 2016, SiGe, Ge, and Related Materials: Materials, Processing, and Devices 7. 8 ed. Electrochemical Society Inc., Vol. 75. p. 163-176 14 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations
2012

High performance group IV photodiodes with tunable absorption edges based on ternary SiGeSn alloys

Beeler, R. T., Menendez, J., Smith, D. & Kouvetakis, J., Dec 1 2012, SiGe, Ge, and Related Compounds 5: Materials, Processing, and Devices. 9 ed. p. 591-599 9 p. (ECS Transactions; vol. 50, no. 9).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations
2015

Crystalline tetrahedral phases Al1-xBxPSi3 and Al1-xBxAsT3 (T = Si, Ge) Via Reactions of Al(BH4)3 and M(TH3)3 (M = P, As)

Sims, P., Aoki, T., Menendez, J. & Kouvetakis, J., 2015, ECS Transactions. 14 ed. Electrochemical Society Inc., Vol. 69. p. 83-93 11 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2011

Synthesis and materials properties of sn/p-doped ge on si(100): Photoluminescence and prototype devices

Beeler, R. T., Grzybowski, G. J., Roucka, R., Jiang, L., Mathews, J., Smith, D., Menendez, J., Chizmeshya, A. & Kouvetakis, J., Oct 25 2011, In : Chemistry of Materials. 23, 20, p. 4480-4486 7 p.

Research output: Contribution to journalArticle

14 Scopus citations
2012

(Si) 5-2y(AlP) y alloys assembled on Si(100) from Al-P-Si 3 building units

Watkins, T., Jiang, L., Xu, C., Chizmeshya, A., Smith, D., Menendez, J. & Kouvetakis, J., Jan 9 2012, In : Applied Physics Letters. 100, 2, 022101.

Research output: Contribution to journalArticle

13 Scopus citations

Synthesis and properties of monocrystalline Al(As 1-xP x)Si 3 alloys on Si(100)

Grzybowski, G., Watkins, T., Beeler, R. T., Jiang, L., Smith, D., Chizmeshya, A., Kouvetakis, J. & Menendez, J., Jun 26 2012, In : Chemistry of Materials. 24, 12, p. 2347-2355 9 p.

Research output: Contribution to journalArticle

9 Scopus citations
2013

Temperature-dependent photoluminescence of Ge/Si and Ge 1-ySny/Si, indicating possible indirect-to-direct bandgap transition at lower Sn content

Ryu, M. Y., Harris, T. R., Yeo, Y. K., Beeler, R. T. & Kouvetakis, J., Apr 29 2013, In : Applied Physics Letters. 102, 17, 171908.

Research output: Contribution to journalArticle

53 Scopus citations

Fundamental band gap and direct-indirect crossover in Ge 1-x-ySixSny alloys

Gallagher, J. D., Xu, C., Jiang, L., Kouvetakis, J. & Menendez, J., Nov 11 2013, In : Applied Physics Letters. 103, 20, 202104.

Research output: Contribution to journalArticle

41 Scopus citations
2011

Direct gap electroluminescence from Si/Ge1-y Sny p-i-n heterostructure diodes

Roucka, R., Mathews, J., Beeler, R. T., Tolle, J., Kouvetakis, J. & Menendez, J., Feb 7 2011, In : Applied Physics Letters. 98, 6, 061109.

Research output: Contribution to journalArticle

87 Scopus citations
2012
30 Scopus citations

Degenerate parallel conducting layer and conductivity type conversion observed from p-Ge1-ySny (y=0.06%) grown on n-Si substrate

Ryu, M. Y., Yeo, Y. K., Ahoujja, M., Harris, T., Beeler, R. & Kouvetakis, J., Sep 24 2012, In : Applied Physics Letters. 101, 13, 131110.

Research output: Contribution to journalArticle

6 Scopus citations

Monocrystalline Al(As1-xNx)Si3 and Al(P1-xNx)ySi5-2 y alloys with diamond-like structures: New chemical approaches to semiconductors lattice matched to Si

Kouvetakis, J., Chizmeshya, A., Jiang, L., Watkins, T., Grzybowski, G., Beeler, R. T., Poweleit, C. & Menendez, J., Aug 28 2012, In : Chemistry of Materials. 24, 16, p. 3219-3230 12 p.

Research output: Contribution to journalArticle

9 Scopus citations
2015

Crystalline (Al1-xBx)PSi3 and (Al1-xBx)AsSi3 tetrahedral phases via reactions of Al(BH4)3 and M(SiH3)3 (M = P, As)

Sims, P., Aoki, T., Favaro, R., Wallace, P., White, A., Xu, C., Menendez, J. & Kouvetakis, J., Apr 28 2015, In : Chemistry of Materials. 27, 8, p. 3030-3039 10 p.

Research output: Contribution to journalArticle

4 Scopus citations
2020

Radiation-induced electron and hole traps in Ge1 -x Sn x (x = 0-0.094)

Hogsed, M., Choe, K., Miguel, N., Wang, B. & Kouvetakis, J., Feb 14 2020, In : Journal of Applied Physics. 127, 6, 065708.

Research output: Contribution to journalArticle

Open Access
2019

Doping dependence of the optical dielectric function in n-type germanium

Xu, C., Kouvetakis, J. & Menendez, J., Feb 28 2019, In : Journal of Applied Physics. 125, 8, 085704.

Research output: Contribution to journalArticle

Open Access
8 Scopus citations
2017

Synthesis and Structural and Optical Properties of Ga(As1-xPx)Ge3 and (GaP)yGe5-2y Semiconductors Using Interface-Engineered Group IV Platforms

Wallace, P. M., Sims, P. E., Xu, C., Poweleit, C. D., Kouvetakis, J. & Menendez, J., Oct 11 2017, In : ACS Applied Materials and Interfaces. 9, 40, p. 35105-35113 9 p.

Research output: Contribution to journalArticle

Temperature dependence of the interband critical points of bulk Ge and strained Ge on Si

Fernando, N. S., Nunley, T. N., Ghosh, A., Nelson, C. M., Cooke, J. A., Medina, A. A., Zollner, S., Xu, C., Menendez, J. & Kouvetakis, J., Nov 1 2017, In : Applied Surface Science. 421, p. 905-912 8 p.

Research output: Contribution to journalArticle

7 Scopus citations
2012

GeSiSn photodiodes with 1 eV optical gaps grown on Si(100) and Ge(100) platforms

Beeler, R. T., Smith, D., Kouvetakis, J. & Menendez, J., Jul 27 2012, In : IEEE Journal of Photovoltaics. 2, 4, p. 434-440 7 p., 6244831.

Research output: Contribution to journalArticle

26 Scopus citations
2013

New strategies for Ge-on-Si materials and devices using non-conventional hydride chemistries: The tetragermane case

Xu, C., Beeler, R. T., Jiang, L., Grzybowski, G., Chizmeshya, A., Menendez, J. & Kouvetakis, J., Oct 1 2013, In : Semiconductor Science and Technology. 28, 10, 105001.

Research output: Contribution to journalArticle

27 Scopus citations
2016

Observation of temperature-dependent heavy- and light-hole split direct bandgap and tensile strain from Ge0.985Sn0.015 using photoreflectance spectroscopy

Jo, H. J., Kim, G. H., Kim, J. S., Ryu, M. Y., Yeo, Y. K., Harris, T. R. & Kouvetakis, J., Jan 1 2016, In : Current Applied Physics. 16, 1, p. 83-87 5 p.

Research output: Contribution to journalArticle

5 Scopus citations
2014

Electrical characterization studies of p-type Ge, Ge1-ySn y, and Si0.09Ge0.882Sn0.028 grown on n-Si substrates

Harris, T. R., Ryu, M. Y., Yeo, Y. K., Beeler, R. T. & Kouvetakis, J., Mar 14 2014, In : Current Applied Physics. 14, SUPPL. 1, p. S123-S128

Research output: Contribution to journalArticle

2 Scopus citations

Atomic scale studies of structure and bonding in A1PSi3 alloys grown lattice-matched on Si(001)

Aoki, T., Jiang, L., Chizmeshya, A., Menendez, J., Kouvetakis, J. & Smith, D., Aug 1 2014, In : Microscopy and Microanalysis. 20, 3, p. 524-525 2 p.

Research output: Contribution to journalConference article

2011

Temperature dependence of the Raman spectrum in Ge1-ySn y and Ge1-x-ySixSny alloys

Bagchi, S., Poweleit, C. D., Beeler, R. T., Kouvetakis, J. & Menendez, J., Nov 2 2011, In : Physical Review B - Condensed Matter and Materials Physics. 84, 19, 193201.

Research output: Contribution to journalArticle

7 Scopus citations
2012
23 Scopus citations
2013

Band gap-engineered group-IV optoelectronic semiconductors, photodiodes and prototype photovoltaic devices

Beeler, R. T., Gallagher, J., Xu, C., Jiang, L., Senaratne, C. L., Smith, D., Menendez, J., Chizmeshya, A. & Kouvetakis, J., Nov 15 2013, In : ECS Journal of Solid State Science and Technology. 2, 9, p. Q172-Q177

Research output: Contribution to journalArticle

15 Scopus citations
2015

Temperature-dependent direct transition energy in Ge0.99Sn0.01 film grown on Si measured by photoreflectance spectroscopy

Jo, H. J., So, M. G., Kim, J. S., Ryu, M. Y., Yeo, Y. K. & Kouvetakis, J., Sep 30 2015, In : Thin Solid Films. 591, p. 295-300 6 p.

Research output: Contribution to journalArticle

8 Scopus citations
2019

Comparison study of temperature dependent direct/indirect bandgap emissions of Ge 1-x-y Si x Sn y and Ge 1-y Sn y grown on Ge buffered Si

Wang, B., Harris, T. R., Hogsed, M. R., Yeo, Y. K., Ryu, M. Y. & Kouvetakis, J., Mar 1 2019, In : Thin Solid Films. 673, p. 63-71 9 p.

Research output: Contribution to journalArticle

1 Scopus citations
2013
6 Scopus citations
2011

Direct gap photoluminescence and electroluminescence in Ge 1-ySny alloys

Roucka, R., Mathews, J., Menendez, J. & Kouvetakis, J., Nov 22 2011, 8th IEEE International Conference on Group IV Photonics, GFP 2011. p. 214-216 3 p. 6053767. (IEEE International Conference on Group IV Photonics GFP).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2015

CMOS compatible in-situ n-type doping of ge using new generation doping agents P(MH3)3 and As(MH3)3 (M=Si, Ge)

Xu, C., Gallagher, J. D., Senaratne, C. L., Sims, P. E., Kouvetakis, J. & Menendez, J., 2015, ECS Transactions. 14 ed. Electrochemical Society Inc., Vol. 69. p. 3-15 13 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations
2012

Synthesis and properties of Si-Ge-Sn materials and devices grown by CVD

Kouvetakis, J., Beeler, R. & Menendez, J., 2012, Information Optoelectronics, Nanofabrication and Testing, IONT 2012.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations
2018

Observation of Amplified Spontaneous Emission in GeSn Waveguides at Room Temperature

Mathews, J., Li, Z., Zhao, Y., Gallagher, J. D., Lombardo, D., Agha, I., Kouvetakis, J. & Menendez, J., Sep 5 2018, IEEE Photonics Society Summer Topicals Meeting Series, SUM 2018. Institute of Electrical and Electronics Engineers Inc., p. 35-36 2 p. 8456690

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2014

Observation of heavy- and light-hole split direct bandgap photoluminescence from tensile-strained GeSn (0.03% Sn)

Harris, T. R., Yeo, Y. K., Ryu, M. Y., Beeler, R. T. & Kouvetakis, J., Sep 14 2014, In : Journal of Applied Physics. 116, 10, 103502.

Research output: Contribution to journalArticle

15 Scopus citations
2012

Nano-synthesis approach to the fabrication of monocrystalline silicon-like (III-V)yIV5-2y semiconductors

Chizmeshya, A., Kouvetakis, J., Grzybowski, G., Beeler, R. & Menendez, J., Dec 1 2012, SiGe, Ge, and Related Compounds 5: Materials, Processing, and Devices. 9 ed. p. 623-634 12 p. (ECS Transactions; vol. 50, no. 9).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2014

Development of light emitting group IV ternary alloys on Si platforms for long wavelength optoelectronic applications

Jiang, L., Xu, C., Gallagher, J. D., Favaro, R., Aoki, T., Menendez, J. & Kouvetakis, J., Apr 22 2014, In : Chemistry of Materials. 26, 8, p. 2522-2531 10 p.

Research output: Contribution to journalArticle

31 Scopus citations

Advances in light emission from group-IV alloys via lattice engineering and n-type doping based on custom-designed chemistries

Senaratne, C. L., Gallagher, J. D., Aoki, T., Kouvetakis, J. & Menendez, J., Oct 28 2014, In : Chemistry of Materials. 26, 20, p. 6033-6041 9 p.

Research output: Contribution to journalArticle

31 Scopus citations
5 Scopus citations

Compositional dependence of the bowing parameter for the direct and indirect band gaps in Ge1-ySny alloys

Gallagher, J. D., Senaratne, C. L., Kouvetakis, J. & Menendez, J., Oct 6 2014, In : Applied Physics Letters. 105, 14, 142102.

Research output: Contribution to journalArticle

61 Scopus citations
3 Scopus citations
2019

Synthesis and Fundamental Studies of Si-Compatible (Si)GeSn and GeSn Mid-IR Systems with Ultrahigh Sn Contents

Xu, C., Ringwala, D., Wang, D., Liu, L., Poweleit, C. D., Chang, S. L. Y., Zhuang, H. L., Menéndez, J. & Kouvetakis, J., Jan 1 2019, (Accepted/In press) In : Chemistry of Materials.

Research output: Contribution to journalArticle

2017

Synthesis and optical properties of (GaAs)yGe5-2 y alloys assembled from molecular building blocks

Sims, P. E., Wallace, P. M., Xu, C., Poweleit, C. D., Claflin, B., Kouvetakis, J. & Menendez, J., Sep 18 2017, In : Applied Physics Letters. 111, 12, 122101.

Research output: Contribution to journalArticle

2 Scopus citations
2013

Optical properties of Ge1x-ySixSny alloys with y > x: Direct bandgaps beyond 1550 nm

Xu, C., Jiang, L., Kouvetakis, J. & Menendez, J., Aug 12 2013, In : Applied Physics Letters. 103, 7, 072111.

Research output: Contribution to journalArticle

18 Scopus citations
2015
11 Scopus citations
2019

Enhanced optical and electrical performance of Ge 1-x Sn x /Ge/Si(100) (xx?=?0.062) semiconductor via inductively coupled H2plasma treatments

Wang, B., Hogsed, M. R., Harris, T. R., Wallace, P. M. & Kouvetakis, J., Mar 20 2019, In : Semiconductor Science and Technology. 34, 4, 045014.

Research output: Contribution to journalArticle

2015

Compositional dependence of optical interband transition energies in GeSn and GeSiSn alloys

Xu, C., Senaratne, C. L., Kouvetakis, J. & Menendez, J., Aug 1 2015, In : Solid-State Electronics. 110, p. 76-82 7 p.

Research output: Contribution to journalArticle

12 Scopus citations
2011
42 Scopus citations
2017

Observation of Phase-Filling Singularities in the Optical Dielectric Function of Highly Doped n -Type Ge

Xu, C., Fernando, N. S., Zollner, S., Kouvetakis, J. & Menendez, J., Jun 27 2017, In : Physical Review Letters. 118, 26, 267402.

Research output: Contribution to journalArticle

5 Scopus citations
2016
21 Scopus citations
2018

Investigation of hydrogen inductively coupled plasma treatment effect for Ge 0.938 Sn 0.062 /Ge/Si film using photoreflectance spectroscopy

Jo, H. J., Kim, J. S., Ryu, M. Y., Yeo, Y. K. & Kouvetakis, J., Jan 1 2018, In : Thin Solid Films. 645, p. 345-350 6 p.

Research output: Contribution to journalArticle

1 Scopus citations