Monolithic manufacturing of an electrically addressable quasi-suspended nanophotonic aperture.

At the nanoscale, electrically injecting carriers into photonic structures remains fundamentally challenging because the conductive pathways required for electrical operation perturb the optical environment needed for strong light-matter interaction. Here we demonstrate a monolithic architecture that overcomes this fundamental trade-off by enabling unit-cell-resolved electrical injection into extended nanophotonic modes while preserving the full semiconductor-air index contrast and the symmetry of the optical cavity. Our approach employs a quasi-suspended photonic crystal aperture supported by an array of subwavelength nanoposts positioned at electromagnetic field nodes of a bound-state-in-continuum mode. This configuration enables uniform carrier injection across hundreds of unit cells without perturbing the optical mode. We show that the transition from single-point to distributed injection introduces a new regime in which the uniformity of electrical properties, not optical properties, becomes the dominant constraint, requiring precise control of nanopost uniformity to achieve lasing. Room-temperature electrically pumped lasing at telecommunication wavelengths demonstrates the viability of this architecture. Our results establish a general framework for decoupling electronic transport from nanophotonic mode engineering.