Optically activated object mass transfer using multiple optical energy sources

A transfer system, comprising:

• first and second optical energy sources operable to provide a respective first optical energy and second optical energy at a respective first wavelength and a second wavelength;
• a chiplet having a bonding feature configured to interface with a corresponding bonding feature of a target substrate, at least one of the bonding feature and the corresponding bonding feature absorbing at the first wavelength such that applying the first optical energy bonds the chiplet to the target substrate or removes a bond between the chiplet and the target substrate;
• a transfer layer formed of a thermally switchable material that undergoes a phase change when heated, the transfer layer being placed in contact with the chiplet during a transfer operation;
• and
• an optical absorber material on at least one of the transfer layer and the chiplet, the optical absorber material absorbing at the second wavelength such that applying the second optical energy heats a region of the transfer layer that corresponds to a location of the chiplet causing the region to adhere to the chiplet when removing the chiplet from a source substrate during the transfer operation, the transfer layer being reusable for repeated transfer operations.