This study demonstrates the experimental achievement of 1.056 Tb/s wireless transmission using photonics-aided millimeter-wave (mm-wave) technology at D-band (110–170 GHz). To overcome the bandwidth limitations of electronic components and the severe path loss at high frequencies, the system employs a 4×4 Multiple-Input Multiple-Output (MIMO) architecture combined with advanced modulation and digital signal processing (DSP) techniques. Specifically, Probabilistic Shaping 64-QAM (PS-64QAM), Nyquist shaping, and Look-Up Table (LUT) predistortion were utilized to maximize spectral efficiency and mitigate hardware impairments. The signals were successfully delivered over a 3.1-meter wireless distance with a bit-error ratio (BER) below the hard-decision forward-error-correction (HD-FEC) threshold. This work provides a critical technological roadmap for ultra-high-capacity wireless backhaul and fronthaul in future 6G networks.