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HL: Fachverband Halbleiterphysik

HL 20: Poster I

HL 20.3: Poster

Dienstag, 18. März 2025, 10:00–12:30, P3

Semiconductor membrane transfer for deterministic Circular Bragg Gratings fabrication — •Juan Nicolas Claro Rodriguez, Dennis Deutsch, Leonie Schubert, Dirk Reuter, and Klaus Joens — PhoQS Institute, CeOPP, and Department of Physics, Paderborn University, Paderborn

Highly indistinguishable single photons and strongly entangled photon-pairs are fundamental for photonic quantum communication [1]. InGaAs quantum dots (QDs) grown on InP substrates using MBE deposition [2] emit in the telecom C-band, making them ideal for long-distance communication, though their brightness is limited. Embedding these QDs in hybrid Circular Bragg Gratings (CBGs) enhances photon collection efficiency and the Purcell factor, supported by a backside mirror and transparent medium configuration [3]. We present a membrane transfer method involving backside mirror growth, press-bonding, and InP substrate removal via HCl etching, enabling emitter localization and CBG integration. PL spectra are used to assess sample quality.

[1] Applied Physics Letters, 118(10), 100502. [2] AIP Advances, 13(5). [3] Journal of the Korean Physical Society, 73(10), 1502*1505.

Keywords: Circular Bragg gratings; Quantum emitters; Heterogeneous Integration