Enhanced single photon emission from positioned InP/GaInP quantum dots coupled to a confined Tamm-plasmon mode

Abstract

We report on the enhancement of the spontaneous emission in the visible red spectral range from site-controlled InP/GaInP quantum dots by resonant coupling to Tammplasmon modes confined beneath gold disks in a hybrid metal/semiconductor structure. The enhancement of the emission intensity is confirmed by spatially resolved microphotoluminescence area scans and temperature dependent measurements. Single photon emission from our coupled system is verified via second order autocorrelation measurements.We observe bright single quantum dot emission of up to ~173000 detected photons per second at a repetition rate of the excitation source of 82 MHz, and calculate an extraction efficiency of our device as high as 7%.

Coherent control and angular momentum transfer in semiconductor and plasmonic nanostructures

“…Enhancement of the emission is demonstrated also in another system where the QDs are coupled to confined Tamm plasmons. This is confirmed by spatially resolved micro-photoluminescence area scans and temperature dependent measurements [6]. Recent results on transient four-wave mixing and photon echoes in planar Tamm-plasmon structures with QDs demonstrate significant enhancement of non-linear optical response by several orders of magnitude.…”

Tamm plasmons for efficient interaction of telecom wavelength photons and quantum dots

“…This avoids the need to etch the QDcontaining layers, which is thought to lead to charge noise in the structure [15], [16]. CTPs have already been demonstrated in several QD-based applications such as lasers [17] and single-photon sources [18], [19] but to our knowledge have never been considered in the telecoms wavelength regime. In addition, the relation between the QD's position relative to the mode and how this affect its emission characteristics, such as lifetime and emission angle, is complex and poorly understood.…”

Photon echoes from (In,Ga)As quantum dots embedded in a Tamm-plasmon microcavity

“…The presence of the metal layer gives rise to pure dephasing of the QD excitons with characteristic times of about 200-400 ps so that pure dephasing remains quite weak. We note that the metal layer at the top of the TP microcavity can be used to control the charge state of QDs electrically [13]. Therefore, such structures are appealing for investigations of long-lived photon echoes from charged QDs where the decay rate is governed by the spin relaxation of the resident electrons [34].…”

“…So far, efforts have mainly been focused on time-integrated and time-resolved studies of the emission under nonresonant excitation. Thereby, the Purcell effect of single QD excitons coupled to a localized TP mode [12], enhancement of the spontaneous emission [13], and coherent laser emission [10,14] were demonstrated.…”

“…Furthermore, the metal mirror may be used as an electrode to apply a bias voltage to control the charging state of the QDs or to pump the optically active layer electrically [8]. As active materials in the resonator single or multiple quantum well (QW) [8][9][10][11] or QD [12,13] layers as well as organic materials [14,15] and single layers of transitiion * matthias.salewski@tu-dortmund.de metal dichalcogenides [16] were used. So far, efforts have mainly been focused on time-integrated and time-resolved studies of the emission under nonresonant excitation.…”