Anomalous circular polarization of photoluminescence spectra of individual CdSe nanocrystals in an applied magnetic field

H. Htoon; S. A. Crooker; M. Furis; S. Jeong; Al L. Efros; V. I. Klimov

doi:10.1103/PhysRevLett.102.017402

Anomalous circular polarization of photoluminescence spectra of individual CdSe nanocrystals in an applied magnetic field

H. Htoon, S. A. Crooker, M. Furis, S. Jeong, Al L. Efros, V. I. Klimov

Los Alamos National Laboratory

Research output: Contribution to journal › Article

36 Citations (Scopus)

Abstract

We study the low-temperature magnetophotoluminescence from individual CdSe nanocrystals. Nanocrystals having a small "bright" exciton fine structure splitting (ΔXY<0.5meV) exhibit a conventional left and right circularly polarized Zeeman photoluminescence doublet in applied magnetic fields. In contrast, nanocrystals with large ΔXY (>1meV) show an anomalous magnetophotoluminescence polarization, wherein the lower-energy peak becomes circularly polarized with increasing field, while the higher-energy peak remains linearly polarized. This unusual behavior arises from strong mixing between the absorbing and emitting bright exciton levels due to strong anisotropic exchange interactions.

Original language	English
Article number	017402
Journal	Physical review letters
Volume	102
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.102.017402
Publication status	Published - Jan 5 2009

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1103/PhysRevLett.102.017402

Fingerprint Dive into the research topics of 'Anomalous circular polarization of photoluminescence spectra of individual CdSe nanocrystals in an applied magnetic field'. Together they form a unique fingerprint.

Cite this

Htoon, H., Crooker, S. A., Furis, M., Jeong, S., Efros, A. L., & Klimov, V. I. (2009). Anomalous circular polarization of photoluminescence spectra of individual CdSe nanocrystals in an applied magnetic field. Physical review letters, 102(1), [017402]. https://doi.org/10.1103/PhysRevLett.102.017402

@article{136fdad5ad4d4c359fc0003db9b5796c,

title = "Anomalous circular polarization of photoluminescence spectra of individual CdSe nanocrystals in an applied magnetic field",

abstract = "We study the low-temperature magnetophotoluminescence from individual CdSe nanocrystals. Nanocrystals having a small {"}bright{"} exciton fine structure splitting (ΔXY<0.5meV) exhibit a conventional left and right circularly polarized Zeeman photoluminescence doublet in applied magnetic fields. In contrast, nanocrystals with large ΔXY (>1meV) show an anomalous magnetophotoluminescence polarization, wherein the lower-energy peak becomes circularly polarized with increasing field, while the higher-energy peak remains linearly polarized. This unusual behavior arises from strong mixing between the absorbing and emitting bright exciton levels due to strong anisotropic exchange interactions.",

author = "H. Htoon and Crooker, {S. A.} and M. Furis and S. Jeong and Efros, {Al L.} and Klimov, {V. I.}",

year = "2009",

month = jan,

day = "5",

doi = "10.1103/PhysRevLett.102.017402",

language = "English",

volume = "102",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "1",

}

TY - JOUR

T1 - Anomalous circular polarization of photoluminescence spectra of individual CdSe nanocrystals in an applied magnetic field

AU - Htoon, H.

AU - Crooker, S. A.

AU - Furis, M.

AU - Jeong, S.

AU - Efros, Al L.

AU - Klimov, V. I.

PY - 2009/1/5

Y1 - 2009/1/5

N2 - We study the low-temperature magnetophotoluminescence from individual CdSe nanocrystals. Nanocrystals having a small "bright" exciton fine structure splitting (ΔXY<0.5meV) exhibit a conventional left and right circularly polarized Zeeman photoluminescence doublet in applied magnetic fields. In contrast, nanocrystals with large ΔXY (>1meV) show an anomalous magnetophotoluminescence polarization, wherein the lower-energy peak becomes circularly polarized with increasing field, while the higher-energy peak remains linearly polarized. This unusual behavior arises from strong mixing between the absorbing and emitting bright exciton levels due to strong anisotropic exchange interactions.

AB - We study the low-temperature magnetophotoluminescence from individual CdSe nanocrystals. Nanocrystals having a small "bright" exciton fine structure splitting (ΔXY<0.5meV) exhibit a conventional left and right circularly polarized Zeeman photoluminescence doublet in applied magnetic fields. In contrast, nanocrystals with large ΔXY (>1meV) show an anomalous magnetophotoluminescence polarization, wherein the lower-energy peak becomes circularly polarized with increasing field, while the higher-energy peak remains linearly polarized. This unusual behavior arises from strong mixing between the absorbing and emitting bright exciton levels due to strong anisotropic exchange interactions.

UR - http://www.scopus.com/inward/record.url?scp=59149083353&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=59149083353&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.102.017402

DO - 10.1103/PhysRevLett.102.017402

M3 - Article

AN - SCOPUS:59149083353

VL - 102

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 1

M1 - 017402

ER -