They've also stated, "This will be the first dinner for a foreign dignitary at the White House under the Trump administration and we think that's very significant".
Speaking on collaboration in cutting-edge technology, Modi announced the setting up of a joint science and technology fund of four million euros.
He also addressed the Indian community and presented the Overseas Citizen of India card to Costa.
Mr Modi will also meet USA secretary of state Rex Tillerson and U.S. secretary of defence James Mattis.
In a development that will provide a boost to India's maritime security, the Trump administration has authorised the sale of unarmed surveillance drones to India, the manufacturer said on Friday, as the two nations' leaders prepare for their first face-to-face meeting.
The Prime Minister visited the facilities at the Foundation, and interacted briefly with Indian researchers. The Washington meeting between two of the most important global statespersons is certain to have important and beneficial consequences, given the strong determination on both sides to ensure that India and the U.S. form a partnership that is essential to meet the geopolitical challenges of the 21st century.
"The White House is every interested in making this a special visit", the senior administration official said.
India's Prime Minister Narendra Modi waves while walking with Portuguese Prime Minister Antonio Costa, right, during a visit to the Radha Krishna Temple in Lisbon, Portugal, Saturday June 24, 2017. Both countries also focussed on cooperation in areas like counter-terrorism, space and climate studies. He reached Portugal on Saturday ahead of his visit to the United States on June 26 and will visit the Netherlands on June 27 on the way back home.
"I look forward to meeting Prime Minister Rutte and reviewing our bilateral relations", Modi said.
Indian diplomats in Washington emphasised the commonalities between the leaders, citing Modi's business sensibilities and populist appeal.
The Prime Minister said he will meet CEOs of major Dutch companies and will encourage them to join the Indian growth story.
Modi said the Netherlands is India's sixth largest trading partner in the European Union and fifth largest investment partner globally.
Defense cooperation, the United States trade deficit with India, counter-terrorism efforts and regional tensions are expected to be discussed between the two leaders.
The Foundation represents multiple synergies between India and Portugal.
"Indians have carried their cultural heritage with them and have always been proud of them", Modi said addressing the diaspora Indians in Lisbon.