Light converter assemblies with enhanced heat dissipation

A light converter assembly comprising:

• a first substrate and a second substrate, the first and second substrates comprising a light transmissive, thermally conductive material;
• a phosphor material disposed between the first and second substrates;
• a confinement material disposed between the first and second substrates, the confinement material surrounding the phosphor material and bonding the first and second substrates together to hermetically seal the phosphor material between the first and second substrates,
• wherein the confinement material has a thermal conductivity greater than 10 W/m*K,
• wherein the confinement material comprises two layers, and
• wherein a first layer of the confinement material is deposited on a surface of the first substrate and a second layer of the confinement material is deposited on a surface of the second substrate;
• and
• a heat sink attached to the second substrate and the first layer of the confinement material on the first substrate, wherein the first substrate is larger than the second substrate such that an interfacial area of the first substrate and the heat sink is increased, and wherein the heat sink comprises an aperture positioned so that an excitation beam is able to impinge on the phosphor material.