Devices, systems, and methods for fabricating alkali vapor cells

A method comprising:

• flowing a fluid from an inlet to an outlet of a lumen of a main conduit of a device, the device comprising:
• a first layer having a top surface and a bottom surface opposite and spaced apart from the top surface;
• a second layer having a top surface and a bottom surface opposite and spaced apart from the top surface;
• the second layer comprising a set of first cavities, a groove, and a set of second cavities;
• wherein the set of first cavities comprise an inlet shaft and an outlet shaft, wherein the inlet shaft and the outlet shaft each perforates the second layer from the top surface to the bottom surface;
• wherein each of the second cavities perforates the second layer from the top surface to the bottom surface;
• wherein the groove extends from the inlet shaft to the outlet shaft along the bottom surface of the second layer;
• wherein the inlet shaft, the outlet shaft, and each of the second cavities are in fluid communication with the groove;
• wherein the second layer is disposed on the first layer, such that the bottom surface of the second layer is disposed on the top surface of the first layer;
• wherein the inlet shaft, the outlet shaft, and the groove together with the top surface of the first layer defines the main conduit having a longitudinal axis, the inlet, the outlet axially spaced apart from the inlet, and the lumen for fluid flow extending from the inlet to the outlet;
• wherein the set of second cavities together with the top surface of the first layer defines a set of receptacles;
• and wherein each of the receptacles is in fluid communication with the lumen of the main conduit;
• such that, when the fluid flows from the inlet to the outlet through the lumen of the main conduit, the fluid further flows into each of the receptacles via capillary action, such that the fluid at least partially fills each of the receptacles;
• wherein the fluid comprises an alkali metal precursor and a solvent.