Conference Agenda

This presentation introduces recent advances in transfer-integrated nanolaser platforms for next-generation silicon photonics and co-packaged optics (CPO). Starting from planar heterogeneous integration of III–V nanolasers onto silicon waveguides, scalable transfer-printing strategies for ultra-compact on-chip light sources will be discussed. Particular emphasis will be placed on rolling-enabled non-planar integration, which introduces mechanical orientation as a new degree of freedom for polarization-selective coupling and expanded device functionality. In addition, minimal-gain printed silicon nanolasers enabling continuous-wave operation and three-dimensionally programmable nanolaser arrays around optical fibers will be presented, demonstrating how transfer integration can extend nanophotonic systems beyond the limitations of conventional monolithic fabrication.

We address the coupling of a relatively wide optical beam from a tapered lensed fiber into a narrow vertical nano-waveguide, where direct butt coupling leads to significant losses due to strong mode mismatch. The particular geometry of the waveguide prevents the use of conventional linear tapering from a wide input region, and a novel concept is proposed. A branch-based edge coupler in which the wide input region is replaced by multiple closely spaced segments that satisfy the fabrication constraints, together with the waveguide geometry. The optical field is first distributed across the branches, then gradually confined toward the outermost branch, and finally recombined in a merging section to form a single confined waveguide mode.

We demonstrate the first realization of hybrid silicon nitride-semiconductor carbon nanotube (CNTs) waveguides exhibiting a negative 3rd order nonlinear coefficient around 1580 nm. The negative nonlinear refractive index of the CNT layer is measured 100 times higher in absolute value than that of silicon.

This work demonstrates an on-chip, pulsed terahertz emitter based on optical rectification in thin-film lithium niobate, pumped at 1.03 µm, that achieves 2× higher output for a given device length than a comparable design optimized for 1.55 µm pump, while requiring up to 2.5× shorter lengths to reach a given amplitude.

We theoretically investigate the collective emission of one and two

circular arrays of two-level atoms surrounding an optical nanofiber (ONF). Our

study reveals that the radiation eigenmodes (REMs) of a single ring selectively

couple to specific guided modes of the fiber, depending on their symmetry. By

tuning the physical parameters of the system, we demonstrate that the emis-

sion towards radiation modes can be highly suppressed, thereby enhancing the

lifetime of the atomic excitation. Two identical rings positioned at a distance

from each other along the nanofiber can exchange an excitation even at large

separations through nanofiber guided modes. This results in enhanced sub-

and super-radiance compared to the single-ring case. The selective coupling of

REMs to specific guided modes and the enhanced sub- and super-radiance in a

two-ring system suggest that the ring configuration is promising for implement-

ing efficient and versatile light-matter nanofiber-based interfaces and achieving

waveguide quantum electrodynamics (WQED).