Similarities in the optical properties of hexagonal and cubic InGaN quantum wells

S. F. Chichibu, M. Sugiyama, T. Onuma, T. Kuroda, Atsushi Tackeuchi, Takayuki Sota, T. Kitamura, H. Nakanishi, Y. Ishida, H. Okumura, S. Keller, U. K. Mishra, S. P. DenBaars, S. Nakamura

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

Abstract

Optical properties of fully-strained wurtzite and zincblende In xGa 1-xN/GaN multiple quantum well (MQW) structures were compared to discuss the origin of exciton localization. In contrast to the hexagonal InGaN MQWs, the photoluminescence (PL) peak energy of cubic InGaN MQWs showed a moderate blueshift with decreasing well thickness, L, and low-temperature PL decay time of the cubic MQWs did not depend strongly on L. The results imply that the wavefunction overlap in cubic InGaN MQWs was not reduced compared to the hexagonal ones, since they do not suffer from the electric field normal to the QW plane due either to spontaneous or piezoelectric polarization. Both MQWs exhibited a large and composition-dependent bandgap bowing, and time-resolved PL (TR-PL) signals showed a stretched-exponential decay even at room temperature. The exciton localization is considered to be an intrinsic property of InGaN.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium - Proceedings
EditorsJ.E. Northrup, J. Neugebauer, D.C. Look, S.F. Chichibu, H. Riechert
Pages481-486
Number of pages6
Volume693
Publication statusPublished - 2002
Externally publishedYes
EventGaN and Related Alloys-2001 - Boston, MA, United States
Duration: 2001 Nov 262001 Nov 30

Other

OtherGaN and Related Alloys-2001
CountryUnited States
CityBoston, MA
Period01/11/2601/11/30

Fingerprint

Semiconductor quantum wells
Photoluminescence
Optical properties
Excitons
Bending (forming)
Wave functions
Energy gap
Electric fields
Polarization
Temperature
Chemical analysis
LDS 751

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Chichibu, S. F., Sugiyama, M., Onuma, T., Kuroda, T., Tackeuchi, A., Sota, T., ... Nakamura, S. (2002). Similarities in the optical properties of hexagonal and cubic InGaN quantum wells. In J. E. Northrup, J. Neugebauer, D. C. Look, S. F. Chichibu, & H. Riechert (Eds.), Materials Research Society Symposium - Proceedings (Vol. 693, pp. 481-486)

Similarities in the optical properties of hexagonal and cubic InGaN quantum wells. / Chichibu, S. F.; Sugiyama, M.; Onuma, T.; Kuroda, T.; Tackeuchi, Atsushi; Sota, Takayuki; Kitamura, T.; Nakanishi, H.; Ishida, Y.; Okumura, H.; Keller, S.; Mishra, U. K.; DenBaars, S. P.; Nakamura, S.

Materials Research Society Symposium - Proceedings. ed. / J.E. Northrup; J. Neugebauer; D.C. Look; S.F. Chichibu; H. Riechert. Vol. 693 2002. p. 481-486.

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

Chichibu, SF, Sugiyama, M, Onuma, T, Kuroda, T, Tackeuchi, A, Sota, T, Kitamura, T, Nakanishi, H, Ishida, Y, Okumura, H, Keller, S, Mishra, UK, DenBaars, SP & Nakamura, S 2002, Similarities in the optical properties of hexagonal and cubic InGaN quantum wells. in JE Northrup, J Neugebauer, DC Look, SF Chichibu & H Riechert (eds), Materials Research Society Symposium - Proceedings. vol. 693, pp. 481-486, GaN and Related Alloys-2001, Boston, MA, United States, 01/11/26.
Chichibu SF, Sugiyama M, Onuma T, Kuroda T, Tackeuchi A, Sota T et al. Similarities in the optical properties of hexagonal and cubic InGaN quantum wells. In Northrup JE, Neugebauer J, Look DC, Chichibu SF, Riechert H, editors, Materials Research Society Symposium - Proceedings. Vol. 693. 2002. p. 481-486
Chichibu, S. F. ; Sugiyama, M. ; Onuma, T. ; Kuroda, T. ; Tackeuchi, Atsushi ; Sota, Takayuki ; Kitamura, T. ; Nakanishi, H. ; Ishida, Y. ; Okumura, H. ; Keller, S. ; Mishra, U. K. ; DenBaars, S. P. ; Nakamura, S. / Similarities in the optical properties of hexagonal and cubic InGaN quantum wells. Materials Research Society Symposium - Proceedings. editor / J.E. Northrup ; J. Neugebauer ; D.C. Look ; S.F. Chichibu ; H. Riechert. Vol. 693 2002. pp. 481-486
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AU - Tackeuchi, Atsushi

AU - Sota, Takayuki

AU - Kitamura, T.

AU - Nakanishi, H.

AU - Ishida, Y.

AU - Okumura, H.

AU - Keller, S.

AU - Mishra, U. K.

AU - DenBaars, S. P.

AU - Nakamura, S.

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N2 - Optical properties of fully-strained wurtzite and zincblende In xGa 1-xN/GaN multiple quantum well (MQW) structures were compared to discuss the origin of exciton localization. In contrast to the hexagonal InGaN MQWs, the photoluminescence (PL) peak energy of cubic InGaN MQWs showed a moderate blueshift with decreasing well thickness, L, and low-temperature PL decay time of the cubic MQWs did not depend strongly on L. The results imply that the wavefunction overlap in cubic InGaN MQWs was not reduced compared to the hexagonal ones, since they do not suffer from the electric field normal to the QW plane due either to spontaneous or piezoelectric polarization. Both MQWs exhibited a large and composition-dependent bandgap bowing, and time-resolved PL (TR-PL) signals showed a stretched-exponential decay even at room temperature. The exciton localization is considered to be an intrinsic property of InGaN.

AB - Optical properties of fully-strained wurtzite and zincblende In xGa 1-xN/GaN multiple quantum well (MQW) structures were compared to discuss the origin of exciton localization. In contrast to the hexagonal InGaN MQWs, the photoluminescence (PL) peak energy of cubic InGaN MQWs showed a moderate blueshift with decreasing well thickness, L, and low-temperature PL decay time of the cubic MQWs did not depend strongly on L. The results imply that the wavefunction overlap in cubic InGaN MQWs was not reduced compared to the hexagonal ones, since they do not suffer from the electric field normal to the QW plane due either to spontaneous or piezoelectric polarization. Both MQWs exhibited a large and composition-dependent bandgap bowing, and time-resolved PL (TR-PL) signals showed a stretched-exponential decay even at room temperature. The exciton localization is considered to be an intrinsic property of InGaN.

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