Leiden University Student Repository

Bent, Eli van der (2024)

Absorption spectroscopy with a single photon source

Master thesis | Physics (MSc)

In this thesis we present our experimental work towards realizing single photon spectroscopy. Based on theoretical predictions and experimental confirmation with laser absorption spectroscopy, we identify a reltively strong transition of water vapor. This transition is in close proximity to the emission of our single photon source: a semiconductor GaAs embedded InGaAs quantum dot (QD) with emission close to 935 nm. We then show absorption spectroscopy with this single photon source where we scan the emission wavelength of the quantum dot by means of the Stark effect. In a 75 pm wide spectral range for which the source is capable of producing relatively pure single photons, which we confirm with Hanbury Brown Twiss interferometry, we measure the transmission of 261 cm humid air with QD light. We find that the observed peak wavelength and linewidth characterizing this transition compare well with the expected parameters obtained from the HITRAN database.

Absorption spectroscopy, single-photon source, quantum light

Author

Bent, Eli van der

Faculty

Faculty of Science

Specialisation

Quantum Matter and Optics (QMO)

Supervisors

M.T.L. Poortvliet MSc
Dr. W. Löffler

ECTS Credits

24

Language

en