Using Dried Rhodamine B Fluorescence for Temperature Characterization of Sub-Micron Scale Devices

We present here preliminary investigations on the use of dried Rhodamine B as a probe for micrometer scale and submicrometer scale temperature measurements. It is shown that even in dry conditions, Rhodamine B maintains a temperature dependent fluorescent intensity. Investigations on its photostability as well as its thermal stability in dry conditions are presented. It is concluded that Rhodamine B holds good promise for temperature mapping with submicrometer spatial resolution when confined to the vicinity of a sample surface.