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Excitation of single photon emitters via a two-photon process can be employed for high resolution imaging and has applications in quantum optics. Here, we present one- and two-photon excitation of single defects in hexagonal boron.
Tapered optical fibers, single mode fiber with a tapered region diameter of hundreds of nanometers, which we call optical nanofiber, are attracting attention. At the tapered region, light propagates along the fiber with very strong evanescent field outside the sub-micron glass core. The large evanescent field enables highly efficient coupling of single light emitters to an optical nanofiber [1, 2]...
Efficient coupling of photons emitted from single light emitters into the single guided mode of an optical fiber is important to realize photonic quantum network devices [1], such as single photon sources [2] and quantum phase gates [3]. For this purpose, we have developed nanofiber Bragg cavities (NFBCs) and observed the enhanced photon emission from the single light emitter [4]. Here, we report...
Coupling of lithe emitters to the fiber Bragg grating cavity is experimentally realized and the position dependence of spontaneous emission of a single dipole coupled to the cavity is numerically analyzed using 3D FDTD.
We introduce nanofiber Bragg cavities fulfilling three important requirements: small mode-volume, wide tuning-range, and efficient fiber-coupling. In a first application, we show enhancement of single quantum emitters such as quantum dots and nitrogen vacancy centers.
A detailed numerical study using 3D FDTD simulation on the fiber Bragg grating cavity is reported in order to further improve the ultra-wide tunability over 20 nm and the enhanced spontaneous emission we recently reported.
For efficient interfacing of quantum emitters nano- and microcavities are important tools. Here, we introduce Bragg cavities fabricated on nanofibers. We show strain-tuning of the cavity resonance and first coupling experiments with quantum emitters.
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