Direct Measurement of the THz Local Density of Optical States

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

Samenvatting

We introduce a double near-field THz probe microscope using micro-structured photoconductive antennas that allows the local excitation and detection of THz transients. When the THz probes for emission and detection are at distances much shorter than THz wavelengths, this setup effectively detects the complex THz field at the position of the source. The imaginary component of this field corresponds to the partial local density of optical states (partial LDOS), which defines the strength of interaction of the local source with its surrounding photonic medium. We use this novel technique to perform the first direct measurement of the partial LDOS of a dipole source close to a planar interface, the so-called Drexhage configuration, achieving an excellent agreement with theory. Our direct determination of the partial LDOS by measuring the complex field at the position of the source illustrates the potential of THz near-field microscopy for the precise investigation of photonic media and can be easily applied to more complex resonant media.

Originele taal-2Engels
Titel2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023
UitgeverijInstitute of Electrical and Electronics Engineers
Aantal pagina's2
ISBN van elektronische versie979-8-3503-3660-3
DOI's
StatusGepubliceerd - 31 okt. 2023
Evenement48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023 - Montreal, Canada
Duur: 17 sep. 202322 sep. 2023

Congres

Congres48th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2023
Land/RegioCanada
StadMontreal
Periode17/09/2322/09/23

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