“…Originally explored in the Bell Lab in 1990 [2], with the most successful commercialization in SOI (silicon on insulator), crystalline NMs have been experimentally transferred and stacked onto foreign substrates, including both rigid (e.g., silicon and glass) and flexible (e.g., plastics and polymers) substrates [3][4][5][6][7][8][9][10][11][12][13][14][15]. Over the past few years, a polydimethylsiloxane (PDMS) stamp transfer printing process, pioneered by Rogers et al [3,16], has been developed for the transfer of crystalline semiconductor NMs onto any substrates, for multi-layer stacking and integration onto silicon, glass, or polymer substrates [3,4,14,[17][18][19]. Based on this disruptive NM platform, a new class of photonic structures and devices has been demonstrated [3,4,8,12,14,[17][18][19][20][21][22][23][24][25][26].…”