Visible photon emission from defects in hexagonal boron nitride flakes
by
Fırat, Volkan, author.
Title
:
Visible photon emission from defects in hexagonal boron nitride flakes
Author
:
Fırat, Volkan, author.
Personal Author
:
Fırat, Volkan, author.
Physical Description
:
xi, 49 leaves: color illustraltions.+ 1 computer laser optical disc.
Abstract
:
Color centers in wide bandgap crystals create discrete energy levels in the bandgap. These discrete energy levels can be used for single photon generation for quantum optics and quantum information applications. In this work, we created optically active defects in multilayer hexagonal boron nitride (hBN) flakes by annealing technique. We produced seven samples at different annealing temperatures (500°C, 750°C and 850°C) and two non-annealed samples for comparison. hBN can host defects emitting at visible wavelengths because of its wide bandgap. We made micro-photoluminescence maps to find point defects in the hBN flakes and then carried out power dependent, polarization dependent and temperature dependent measurements to characterize the emissions. We observed highly localized point-like emitters with a size of about 0.5 m that reach saturation at relatively low excitation powers, show dipole characteristics, have very narrow zero-phonon lines having widths as small as 0.8 meV . These results prove the presence of optically active defects with discrete energy levels.
Subject Term
:
Photon emission.
Point defects.
Boron nitride.
Added Author
:
Ateş, Serkan
Added Corporate Author
:
İzmir Institute of Technology. Physics.
Added Uniform Title
:
Thesis (Master)--İzmir Institute of Technology: Physics.
İzmir Institute of Technology: Physics--Thesis (Master).
Electronic Access
:
Library | Material Type | Item Barcode | Shelf Number | Status |
---|
IYTE Library | Thesis | T001585 | QC793.5.P428 F52 2017 | Tez Koleksiyonu |
IYTE Library | Supplementary CD-ROM | ROM2750 | QC793.5.P428 F52 2017 EK.1 | Tez Koleksiyonu |