This is a sources sought notice from NIST for market research to identify vendors capable of supplying one 145 GHz Photodiode. No solicitation is currently available, and the government will not pay for any information received. The notice aims to determine if a small business set-aside opportunity exists, with the NAICS code 334413 and a size standard of 1,250 employees. No budget amount, submission timeline, or performance location is specified. Interested firms should submit a capability statement limited to five pages.