CW and dynamic stable polarized light emission from VCSELs grown on [311]B substrate by MOCVD

AbstractWe have developed an apparatus for polarized cathodoluminescence (CL) spectroscopy combined with transmission electron microscopy (TEM), that enables us to obtain simultaneously structural data in higher spatial resolution by TEM and polarized luminescence spectra by CL of the same microscopic area. The polarized-CL/TEM method is very useful to study the optical properties of low-dimensional microstructures in semiconducting materials. We have applied the method to examine the optical property of antiphase boundaries in CuPt-ordered GaInP2 and found, for the first time, the polarized light emission from the APBs whose habit planes are parallel to the (T11) and (1T0) atomic planes.

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Design and fabrication of birefringent nano-grating structure for circularly polarized light emission

Optics Express ◽

10.1364/oe.22.007388 ◽

2014 ◽

Vol 22 (7) ◽

pp. 7388 ◽

Cited By ~ 9

Author(s):

Ming-Yi Lin ◽

Tsung-Han Tsai ◽

Yu Ling Kang ◽

Yu-Cheng Chen ◽

Yi-Hsiang Huang ◽

...

Keyword(s):

Light Emission ◽

Polarized Light ◽

Circularly Polarized Light ◽

Circularly Polarized ◽

Grating Structure

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Normal electric field enhanced light-induced polarizations and magnetic detection of valley polarization in silicene

Scientific Reports ◽

10.1038/s41598-020-73138-5 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

N. Shahabi ◽

A. Phirouznia

Keyword(s):

Electric Field ◽

Light Emission ◽

Polarized Light ◽

Spin Current ◽

Circularly Polarized Light ◽

Circularly Polarized ◽

Normal Electric Field ◽

Valley Polarization ◽

Population Imbalance ◽

Magnetic Detection

Abstract The role of staggered potential on light-induced spin and pseudo-spin polarization has been investigated in silicene. It has been shown that non-equilibrium spin and pseudo-spin polarizations are emerged in silicene sheet by applying an external perpendicular electric field in the presence of circularly polarized light emission. This electric field results in pseudo-spin resolved states very close to the Dirac points therefore could be considered as a pseudomagnetic field. It has been shown that staggered potential induced spin-valley locking and pseudo-spin resolved bands are responsible for the enhancement of the spin and pseudo-spin polarizations. Meanwhile, spin-valley locking suggests a coexistence of both spin and valley polarizations with nearly identical (or at least proportional) population imbalance at low Fermi energies which could be employed for magnetic detection of the valley polarization. It has been shown that spin-valley locking results in the protection of the spin polarizations against the relaxations in elastic scattering regime. In addition, the results indicate that the pseudo-spin current can be generated by the circularly polarized light which could be explained by asymmetric light absorption of the states in k-space.

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